diff --git a/pkg/front_end/lib/src/fasta/builder/library_builder.dart b/pkg/front_end/lib/src/fasta/builder/library_builder.dart
index 75fd906..3f91bc5 100644
--- a/pkg/front_end/lib/src/fasta/builder/library_builder.dart
+++ b/pkg/front_end/lib/src/fasta/builder/library_builder.dart
@@ -100,10 +100,15 @@
   void addProblem(Message message, int charOffset, int length, Uri fileUri,
       {bool wasHandled: false,
       List<LocatedMessage> context,
-      Severity severity}) {
+      Severity severity,
+      bool problemOnLibrary: false}) {
     fileUri ??= this.fileUri;
+
     loader.addProblem(message, charOffset, length, fileUri,
-        wasHandled: wasHandled, context: context, severity: severity);
+        wasHandled: wasHandled,
+        context: context,
+        severity: severity,
+        problemOnLibrary: true);
   }
 
   /// Returns true if the export scope was modified.
diff --git a/pkg/front_end/lib/src/fasta/fasta_codes.dart b/pkg/front_end/lib/src/fasta/fasta_codes.dart
index 2fe4551..fb721dd 100644
--- a/pkg/front_end/lib/src/fasta/fasta_codes.dart
+++ b/pkg/front_end/lib/src/fasta/fasta_codes.dart
@@ -4,6 +4,8 @@
 
 library fasta.codes;
 
+import 'dart:convert' show JsonEncoder;
+
 import 'package:kernel/ast.dart'
     show Constant, DartType, demangleMixinApplicationName;
 
@@ -181,6 +183,19 @@
     // TODO(ahe): Implement this correctly.
     return ansiFormatted;
   }
+
+  Map<String, Object> toJson() {
+    // The should be kept in sync with package:kernel/problems.md
+    return <String, Object>{
+      "ansiFormatted": ansiFormatted.toList(),
+      "plainTextFormatted": plainTextFormatted.toList(),
+    };
+  }
+
+  String toJsonString() {
+    JsonEncoder encoder = new JsonEncoder.withIndent("  ");
+    return encoder.convert(this);
+  }
 }
 
 String relativizeUri(Uri uri) {
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart
index 96f2460..9fc7db0 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart
@@ -60,6 +60,7 @@
 
 import '../fasta_codes.dart'
     show
+        FormattedMessage,
         LocatedMessage,
         Message,
         messageConflictsWithTypeVariableCause,
@@ -103,6 +104,8 @@
 
 import '../problems.dart' show unexpected, unhandled;
 
+import '../severity.dart' show Severity;
+
 import '../source/source_class_builder.dart' show SourceClassBuilder;
 
 import '../source/source_library_builder.dart'
@@ -237,6 +240,25 @@
           const VoidType(), this, charOffset));
   }
 
+  @override
+  void addProblem(Message message, int charOffset, int length, Uri fileUri,
+      {bool wasHandled: false,
+      List<LocatedMessage> context,
+      Severity severity,
+      bool problemOnLibrary: false}) {
+    fileUri ??= this.fileUri;
+    FormattedMessage formattedMessage = loader.target.createFormattedMessage(
+        message, charOffset, length, fileUri, context, severity);
+    if (formattedMessage != null) {
+      target.problemsAsJson.add(formattedMessage.toJsonString());
+    }
+    super.addProblem(message, charOffset, length, fileUri,
+        wasHandled: wasHandled,
+        context: context,
+        severity: severity,
+        problemOnLibrary: true);
+  }
+
   void addClass(
       String documentationComment,
       List<MetadataBuilder> metadata,
@@ -1310,6 +1332,7 @@
     super.includePart(part, usedParts);
     nativeMethods.addAll(part.nativeMethods);
     boundlessTypeVariables.addAll(part.boundlessTypeVariables);
+    target.problemsAsJson.addAll(part.target.problemsAsJson);
   }
 
   @override
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
index 8949eae..f1b78d6 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
@@ -23,14 +23,12 @@
         InterfaceType,
         InvalidInitializer,
         Library,
-        ListLiteral,
         Name,
         NamedExpression,
         NullLiteral,
         Procedure,
         RedirectingInitializer,
         Source,
-        StringLiteral,
         SuperInitializer,
         TypeParameter,
         TypeParameterType,
@@ -58,7 +56,7 @@
 
 import '../messages.dart'
     show
-        LocatedMessage,
+        FormattedMessage,
         messageConstConstructorNonFinalField,
         messageConstConstructorNonFinalFieldCause,
         messageConstConstructorRedirectionToNonConst,
@@ -71,10 +69,10 @@
 
 import '../problems.dart' show unhandled, unimplemented;
 
-import '../severity.dart' show Severity;
-
 import '../scope.dart' show AmbiguousBuilder;
 
+import '../severity.dart' show Severity;
+
 import '../source/source_class_builder.dart' show SourceClassBuilder;
 
 import '../source/source_loader.dart' show SourceLoader;
@@ -266,6 +264,8 @@
       loader.checkRedirectingFactories(myClasses);
       loader.addNoSuchMethodForwarders(myClasses);
       loader.checkMixins(myClasses);
+      installAllComponentProblems(loader.allComponentProblems);
+      loader.allComponentProblems.clear();
       return component;
     }, () => loader?.currentUriForCrashReporting);
   }
@@ -294,27 +294,19 @@
       runBuildTransformations();
 
       if (verify) this.verify();
-      handleRecoverableErrors(loader.unhandledErrors);
+      installAllComponentProblems(loader.allComponentProblems);
       return component;
     }, () => loader?.currentUriForCrashReporting);
   }
 
-  /// Adds a synthetic field named `#errors` to the main library that contains
-  /// [recoverableErrors] formatted.
-  ///
-  /// If [recoverableErrors] is empty, this method does nothing.
-  void handleRecoverableErrors(List<LocatedMessage> recoverableErrors) {
-    if (recoverableErrors.isEmpty) return;
-    KernelLibraryBuilder mainLibrary = loader.first;
-    if (mainLibrary == null) return;
-    List<Expression> expressions = <Expression>[];
-    for (LocatedMessage error in recoverableErrors) {
-      expressions.add(new StringLiteral(context.format(error, Severity.error)));
+  void installAllComponentProblems(
+      List<FormattedMessage> allComponentProblems) {
+    for (int i = 0; i < allComponentProblems.length; i++) {
+      FormattedMessage formattedMessage = allComponentProblems[i];
+      if (formattedMessage.severity != Severity.ignored) {
+        component.problemsAsJson.add(formattedMessage.toJsonString());
+      }
     }
-    mainLibrary.library.addMember(new Field(new Name("#errors"),
-        initializer: new ListLiteral(expressions, isConst: true),
-        isConst: true,
-        isStatic: true));
   }
 
   /// Creates a component by combining [libraries] with the libraries of
diff --git a/pkg/front_end/lib/src/fasta/kernel/utils.dart b/pkg/front_end/lib/src/fasta/kernel/utils.dart
index 392c061..80118b6 100644
--- a/pkg/front_end/lib/src/fasta/kernel/utils.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/utils.dart
@@ -34,6 +34,7 @@
   if (component == null) return;
   StringBuffer sb = new StringBuffer();
   Printer printer = new Printer(sb);
+  printer.writeComponentProblems(component);
   for (Library library in component.libraries) {
     if (libraryFilter != null && !libraryFilter(library)) continue;
     printer.writeLibraryFile(library);
diff --git a/pkg/front_end/lib/src/fasta/loader.dart b/pkg/front_end/lib/src/fasta/loader.dart
index 8823bfa..04e0028 100644
--- a/pkg/front_end/lib/src/fasta/loader.dart
+++ b/pkg/front_end/lib/src/fasta/loader.dart
@@ -14,6 +14,7 @@
 
 import 'messages.dart'
     show
+        FormattedMessage,
         LocatedMessage,
         Message,
         noLength,
@@ -25,8 +26,6 @@
 
 import 'problems.dart' show internalProblem, unhandled;
 
-import 'rewrite_severity.dart' show rewriteSeverity;
-
 import 'severity.dart' show Severity;
 
 import 'target_implementation.dart' show TargetImplementation;
@@ -58,6 +57,10 @@
   /// [handledErrors].
   final List<LocatedMessage> unhandledErrors = <LocatedMessage>[];
 
+  /// List of all problems seen so far by libraries loaded by this loader that
+  /// does not belong directly to a library.
+  final List<FormattedMessage> allComponentProblems = <FormattedMessage>[];
+
   final Set<String> seenMessages = new Set<String>();
 
   LibraryBuilder coreLibrary;
@@ -216,14 +219,12 @@
   void addProblem(Message message, int charOffset, int length, Uri fileUri,
       {bool wasHandled: false,
       List<LocatedMessage> context,
-      Severity severity}) {
-    severity ??= message.code.severity;
-    if (severity == Severity.errorLegacyWarning) {
-      severity =
-          target.backendTarget.legacyMode ? Severity.warning : Severity.error;
-    }
+      Severity severity,
+      bool problemOnLibrary: false}) {
     addMessage(message, charOffset, length, fileUri, severity,
-        wasHandled: wasHandled, context: context);
+        wasHandled: wasHandled,
+        context: context,
+        problemOnLibrary: problemOnLibrary);
   }
 
   /// All messages reported by the compiler (errors, warnings, etc.) are routed
@@ -238,8 +239,10 @@
   /// [wasHandled] is false.
   bool addMessage(Message message, int charOffset, int length, Uri fileUri,
       Severity severity,
-      {bool wasHandled: false, List<LocatedMessage> context}) {
-    severity = rewriteSeverity(severity, message.code, fileUri);
+      {bool wasHandled: false,
+      List<LocatedMessage> context,
+      bool problemOnLibrary: false}) {
+    severity = target.fixSeverity(severity, message, fileUri);
     if (severity == Severity.ignored) return false;
     String trace = """
 message: ${message.message}
@@ -275,6 +278,10 @@
       (wasHandled ? handledErrors : unhandledErrors)
           .add(message.withLocation(fileUri, charOffset, length));
     }
+    if (!problemOnLibrary) {
+      allComponentProblems.add(target.createFormattedMessage(
+          message, charOffset, length, fileUri, context, severity));
+    }
     return true;
   }
 
diff --git a/pkg/front_end/lib/src/fasta/target_implementation.dart b/pkg/front_end/lib/src/fasta/target_implementation.dart
index 2705f16..0ea68c0 100644
--- a/pkg/front_end/lib/src/fasta/target_implementation.dart
+++ b/pkg/front_end/lib/src/fasta/target_implementation.dart
@@ -6,12 +6,20 @@
 
 import 'package:kernel/target/targets.dart' as backend show Target;
 
+import '../base/processed_options.dart' show ProcessedOptions;
+
 import 'builder/builder.dart' show Declaration, ClassBuilder, LibraryBuilder;
 
 import 'compiler_context.dart' show CompilerContext;
 
 import 'loader.dart' show Loader;
 
+import 'messages.dart' show FormattedMessage, LocatedMessage, Message;
+
+import 'rewrite_severity.dart' show rewriteSeverity;
+
+import 'severity.dart' show Severity;
+
 import 'target.dart' show Target;
 
 import 'ticker.dart' show Ticker;
@@ -115,4 +123,30 @@
       Uri uri, List<int> lineStarts, List<int> sourceCode);
 
   void readPatchFiles(covariant LibraryBuilder library) {}
+
+  /// Create a FormattedMessage and return it, or return [null] if [severity] is
+  /// [Severity.ignored].
+  FormattedMessage createFormattedMessage(
+      Message message,
+      int charOffset,
+      int length,
+      Uri fileUri,
+      List<LocatedMessage> messageContext,
+      Severity severity) {
+    severity = fixSeverity(severity, message, fileUri);
+    if (severity == Severity.ignored) return null;
+    ProcessedOptions processedOptions = context.options;
+    return processedOptions.format(
+        message.withLocation(fileUri, charOffset, length),
+        severity,
+        messageContext);
+  }
+
+  Severity fixSeverity(Severity severity, Message message, Uri fileUri) {
+    severity ??= message.code.severity;
+    if (severity == Severity.errorLegacyWarning) {
+      severity = backendTarget.legacyMode ? Severity.warning : Severity.error;
+    }
+    return rewriteSeverity(severity, message.code, fileUri);
+  }
 }
diff --git a/pkg/front_end/lib/src/fasta/testing/kernel_chain.dart b/pkg/front_end/lib/src/fasta/testing/kernel_chain.dart
index 62b149f..336a72d 100644
--- a/pkg/front_end/lib/src/fasta/testing/kernel_chain.dart
+++ b/pkg/front_end/lib/src/fasta/testing/kernel_chain.dart
@@ -10,8 +10,7 @@
 
 import 'dart:typed_data' show Uint8List;
 
-import 'package:kernel/ast.dart'
-    show Component, Field, Library, ListLiteral, StringLiteral;
+import 'package:kernel/ast.dart' show Component, Library;
 
 import 'package:kernel/binary/ast_to_binary.dart' show BinaryPrinter;
 
@@ -153,29 +152,10 @@
     Uri base = uri.resolve(".");
     Uri dartBase = Uri.base;
     StringBuffer buffer = new StringBuffer();
-    if (messages.isNotEmpty) {
-      buffer.write("// Formatted problems:\n//");
-      for (String line in "${messages}".split("\n")) {
-        buffer.write("\n// $line".trimRight());
-      }
-      buffer.write("\n\n");
-      messages.clear();
-    }
-    for (Field field in library.fields) {
-      if (field.name.name != "#errors") continue;
-      ListLiteral list = field.initializer;
-      buffer.write("// Unhandled errors:");
-      for (StringLiteral string in list.expressions) {
-        buffer.write("\n//");
-        for (String line in string.value.split("\n")) {
-          buffer.write("\n// $line");
-        }
-      }
-      buffer.write("\n\n");
-    }
-    ErrorPrinter printer = new ErrorPrinter(buffer);
-    printer.writeLibraryFile(library);
-    printer.writeConstantTable(component);
+    messages.clear();
+    new Printer(buffer)
+      ..writeProblemsAsJson("Problems in component", component.problemsAsJson)
+      ..writeLibraryFile(library);
     String actual = "$buffer".replaceAll("$base", "org-dartlang-testcase:///");
     actual = actual.replaceAll("$dartBase", "org-dartlang-testcase-sdk:///");
     actual = actual.replaceAll("\\n", "\n");
@@ -378,30 +358,3 @@
   }
   print("Wrote $uri");
 }
-
-class ErrorPrinter extends Printer {
-  ErrorPrinter(StringSink sink, {Object importTable, Object metadata})
-      : super(sink, importTable: importTable, metadata: metadata);
-
-  ErrorPrinter._inner(ErrorPrinter parent, Object importTable, Object metadata)
-      : super(parent.sink,
-            importTable: importTable,
-            metadata: metadata,
-            syntheticNames: parent.syntheticNames,
-            annotator: parent.annotator,
-            showExternal: parent.showExternal,
-            showOffsets: parent.showOffsets,
-            showMetadata: parent.showMetadata);
-
-  @override
-  ErrorPrinter createInner(importTable, metadata) {
-    return new ErrorPrinter._inner(this, importTable, metadata);
-  }
-
-  @override
-  visitField(Field node) {
-    if (node.name.name != "#errors") {
-      super.visitField(node);
-    }
-  }
-}
diff --git a/pkg/front_end/testcases/abstract_members.dart.legacy.expect b/pkg/front_end/testcases/abstract_members.dart.legacy.expect
index 6c8df37..3852086 100644
--- a/pkg/front_end/testcases/abstract_members.dart.legacy.expect
+++ b/pkg/front_end/testcases/abstract_members.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/abstract_members.dart:19:16: Error: Can't inherit members that conflict with each other.
 // abstract class A implements Interface1, Interface2, Interface3 {
@@ -129,65 +131,7 @@
 // pkg/front_end/testcases/abstract_members.dart:91:10: Context: This is the other inherited member.
 //   Object foo() {}
 //          ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/abstract_members.dart:19:16: Error: Can't inherit members that conflict with each other.
-// abstract class A implements Interface1, Interface2, Interface3 {
-//                ^
-//
-// pkg/front_end/testcases/abstract_members.dart:33:7: Error: The non-abstract class 'MyClass' is missing implementations for these members:
-//  - A.abstractMethod
-//  - A.property1=
-//  - A.property3=
-//  - Interface1.interfaceMethod1
-//  - Interface2.interfaceMethod1
-//  - Interface2.interfaceMethod2
-//  - Interface3.interfaceMethod3
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class MyClass extends B {
-//       ^^^^^^^
-//
-// pkg/front_end/testcases/abstract_members.dart:54:7: Error: The non-abstract class 'MyMock3' is missing implementations for these members:
-//  - A.abstractMethod
-//  - A.property1=
-//  - A.property2=
-//  - A.property3=
-//  - Interface1.interfaceMethod1
-//  - Interface2.interfaceMethod1
-//  - Interface2.interfaceMethod2
-//  - Interface3.interfaceMethod3
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class MyMock3 extends B {
-//       ^^^^^^^
-//
-// pkg/front_end/testcases/abstract_members.dart:64:16: Error: Can't inherit members that conflict with each other.
-// abstract class D extends C implements Interface2 {}
-//                ^
-//
-// pkg/front_end/testcases/abstract_members.dart:72:16: Error: Can't inherit members that conflict with each other.
-// abstract class F extends E implements Interface1 {}
-//                ^
-//
-// pkg/front_end/testcases/abstract_members.dart:84:16: Error: Can't inherit members that conflict with each other.
-// abstract class H extends G implements Foo {}
-//                ^
-//
-// pkg/front_end/testcases/abstract_members.dart:96:16: Error: Can't inherit members that conflict with each other.
-// abstract class J extends I implements Bar {}
-//                ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/abstract_members.dart.legacy.transformed.expect b/pkg/front_end/testcases/abstract_members.dart.legacy.transformed.expect
index 9c3e181..3852086 100644
--- a/pkg/front_end/testcases/abstract_members.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/abstract_members.dart.legacy.transformed.expect
@@ -1,8 +1,16 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/abstract_members.dart:19:16: Error: Can't inherit members that conflict with each other.
 // abstract class A implements Interface1, Interface2, Interface3 {
 //                ^
+// pkg/front_end/testcases/abstract_members.dart:6:8: Context: This is one inherited member.
+//   void interfaceMethod1() {}
+//        ^^^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:12:7: Context: This is the other inherited member.
+//   var interfaceMethod1;
+//       ^^^^^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/abstract_members.dart:33:7: Error: The non-abstract class 'MyClass' is missing implementations for these members:
 //  - A.abstractMethod
@@ -17,9 +25,30 @@
 //  - inherit an implementation from a superclass or mixin,
 //  - mark the class as abstract, or
 //  - provide a 'noSuchMethod' implementation.
-// 
+//
 // class MyClass extends B {
 //       ^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:21:3: Context: 'A.abstractMethod' is defined here.
+//   abstractMethod();
+//   ^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:22:12: Context: 'A.property1=' is defined here.
+//   void set property1(_);
+//            ^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:24:12: Context: 'A.property3=' is defined here.
+//   void set property3(_);
+//            ^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:6:8: Context: 'Interface1.interfaceMethod1' is defined here.
+//   void interfaceMethod1() {}
+//        ^^^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:12:7: Context: 'Interface2.interfaceMethod1' is defined here.
+//   var interfaceMethod1;
+//       ^^^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:10:8: Context: 'Interface2.interfaceMethod2' is defined here.
+//   void interfaceMethod2() {}
+//        ^^^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:16:8: Context: 'Interface3.interfaceMethod3' is defined here.
+//   void interfaceMethod3() {}
+//        ^^^^^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/abstract_members.dart:54:7: Error: The non-abstract class 'MyMock3' is missing implementations for these members:
 //  - A.abstractMethod
@@ -35,27 +64,74 @@
 //  - inherit an implementation from a superclass or mixin,
 //  - mark the class as abstract, or
 //  - provide a 'noSuchMethod' implementation.
-// 
+//
 // class MyMock3 extends B {
 //       ^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:21:3: Context: 'A.abstractMethod' is defined here.
+//   abstractMethod();
+//   ^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:22:12: Context: 'A.property1=' is defined here.
+//   void set property1(_);
+//            ^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:23:12: Context: 'A.property2=' is defined here.
+//   void set property2(_);
+//            ^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:24:12: Context: 'A.property3=' is defined here.
+//   void set property3(_);
+//            ^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:6:8: Context: 'Interface1.interfaceMethod1' is defined here.
+//   void interfaceMethod1() {}
+//        ^^^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:12:7: Context: 'Interface2.interfaceMethod1' is defined here.
+//   var interfaceMethod1;
+//       ^^^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:10:8: Context: 'Interface2.interfaceMethod2' is defined here.
+//   void interfaceMethod2() {}
+//        ^^^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:16:8: Context: 'Interface3.interfaceMethod3' is defined here.
+//   void interfaceMethod3() {}
+//        ^^^^^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/abstract_members.dart:64:16: Error: Can't inherit members that conflict with each other.
 // abstract class D extends C implements Interface2 {}
 //                ^
+// pkg/front_end/testcases/abstract_members.dart:12:7: Context: This is one inherited member.
+//   var interfaceMethod1;
+//       ^^^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:59:8: Context: This is the other inherited member.
+//   void interfaceMethod1(_) {}
+//        ^^^^^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/abstract_members.dart:72:16: Error: Can't inherit members that conflict with each other.
 // abstract class F extends E implements Interface1 {}
 //                ^
+// pkg/front_end/testcases/abstract_members.dart:6:8: Context: This is one inherited member.
+//   void interfaceMethod1() {}
+//        ^^^^^^^^^^^^^^^^
+// pkg/front_end/testcases/abstract_members.dart:67:12: Context: This is the other inherited member.
+//   void set interfaceMethod1(_) {}
+//            ^^^^^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/abstract_members.dart:84:16: Error: Can't inherit members that conflict with each other.
 // abstract class H extends G implements Foo {}
 //                ^
+// pkg/front_end/testcases/abstract_members.dart:75:8: Context: This is one inherited member.
+//   void foo() {}
+//        ^^^
+// pkg/front_end/testcases/abstract_members.dart:79:12: Context: This is the other inherited member.
+//   void set foo(_) {}
+//            ^^^
 //
 // pkg/front_end/testcases/abstract_members.dart:96:16: Error: Can't inherit members that conflict with each other.
 // abstract class J extends I implements Bar {}
 //                ^
-
-library;
+// pkg/front_end/testcases/abstract_members.dart:87:14: Context: This is one inherited member.
+//   Object get foo => null;
+//              ^^^
+// pkg/front_end/testcases/abstract_members.dart:91:10: Context: This is the other inherited member.
+//   Object foo() {}
+//          ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/abstract_members.dart.outline.expect b/pkg/front_end/testcases/abstract_members.dart.outline.expect
index 4c05c55..88a97a9 100644
--- a/pkg/front_end/testcases/abstract_members.dart.outline.expect
+++ b/pkg/front_end/testcases/abstract_members.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/abstract_members.dart:19:16: Error: Can't inherit members that conflict with each other.
 // abstract class A implements Interface1, Interface2, Interface3 {
@@ -129,8 +131,7 @@
 // pkg/front_end/testcases/abstract_members.dart:91:10: Context: This is the other inherited member.
 //   Object foo() {}
 //          ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/abstract_members.dart.strong.expect b/pkg/front_end/testcases/abstract_members.dart.strong.expect
index a83ae7e..db234c4 100644
--- a/pkg/front_end/testcases/abstract_members.dart.strong.expect
+++ b/pkg/front_end/testcases/abstract_members.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/abstract_members.dart:19:16: Error: Can't inherit members that conflict with each other.
 // abstract class A implements Interface1, Interface2, Interface3 {
@@ -129,65 +131,7 @@
 // pkg/front_end/testcases/abstract_members.dart:91:10: Context: This is the other inherited member.
 //   Object foo() {}
 //          ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/abstract_members.dart:19:16: Error: Can't inherit members that conflict with each other.
-// abstract class A implements Interface1, Interface2, Interface3 {
-//                ^
-//
-// pkg/front_end/testcases/abstract_members.dart:33:7: Error: The non-abstract class 'MyClass' is missing implementations for these members:
-//  - A.abstractMethod
-//  - A.property1=
-//  - A.property3=
-//  - Interface1.interfaceMethod1
-//  - Interface2.interfaceMethod1
-//  - Interface2.interfaceMethod2
-//  - Interface3.interfaceMethod3
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class MyClass extends B {
-//       ^^^^^^^
-//
-// pkg/front_end/testcases/abstract_members.dart:54:7: Error: The non-abstract class 'MyMock3' is missing implementations for these members:
-//  - A.abstractMethod
-//  - A.property1=
-//  - A.property2=
-//  - A.property3=
-//  - Interface1.interfaceMethod1
-//  - Interface2.interfaceMethod1
-//  - Interface2.interfaceMethod2
-//  - Interface3.interfaceMethod3
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class MyMock3 extends B {
-//       ^^^^^^^
-//
-// pkg/front_end/testcases/abstract_members.dart:64:16: Error: Can't inherit members that conflict with each other.
-// abstract class D extends C implements Interface2 {}
-//                ^
-//
-// pkg/front_end/testcases/abstract_members.dart:72:16: Error: Can't inherit members that conflict with each other.
-// abstract class F extends E implements Interface1 {}
-//                ^
-//
-// pkg/front_end/testcases/abstract_members.dart:84:16: Error: Can't inherit members that conflict with each other.
-// abstract class H extends G implements Foo {}
-//                ^
-//
-// pkg/front_end/testcases/abstract_members.dart:96:16: Error: Can't inherit members that conflict with each other.
-// abstract class J extends I implements Bar {}
-//                ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/accessors.dart.legacy.expect b/pkg/front_end/testcases/accessors.dart.legacy.expect
index 9d3bdd4..7de21a4 100644
--- a/pkg/front_end/testcases/accessors.dart.legacy.expect
+++ b/pkg/front_end/testcases/accessors.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/accessors.dart:16:13: Warning: Getter not found: 'onlySetter'.
 //       print(onlySetter);
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/accessors.dart:40:11: Warning: Getter not found: 'onlySetter'.
 //     print(onlySetter);
 //           ^^^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/accessors.dart.legacy.transformed.expect b/pkg/front_end/testcases/accessors.dart.legacy.transformed.expect
index c6c025f..7de21a4 100644
--- a/pkg/front_end/testcases/accessors.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/accessors.dart.legacy.transformed.expect
@@ -1,4 +1,19 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/accessors.dart:16:13: Warning: Getter not found: 'onlySetter'.
+//       print(onlySetter);
+//             ^^^^^^^^^^
+//
+// pkg/front_end/testcases/accessors.dart:25:11: Warning: Getter not found: 'onlySetter'.
+//     print(onlySetter);
+//           ^^^^^^^^^^
+//
+// pkg/front_end/testcases/accessors.dart:40:11: Warning: Getter not found: 'onlySetter'.
+//     print(onlySetter);
+//           ^^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/accessors.dart.strong.expect b/pkg/front_end/testcases/accessors.dart.strong.expect
index 866b083..01820b8 100644
--- a/pkg/front_end/testcases/accessors.dart.strong.expect
+++ b/pkg/front_end/testcases/accessors.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/accessors.dart:16:13: Error: Getter not found: 'onlySetter'.
 //       print(onlySetter);
@@ -23,18 +25,7 @@
 // pkg/front_end/testcases/accessors.dart:40:11: Error: Getter not found: 'onlySetter'.
 //     print(onlySetter);
 //           ^^^^^^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/accessors.dart:16:13: Error: Getter not found: 'onlySetter'.
-//       print(onlySetter);
-//             ^^^^^^^^^^
-//
-// pkg/front_end/testcases/accessors.dart:25:11: Error: Getter not found: 'onlySetter'.
-//     print(onlySetter);
-//           ^^^^^^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/accessors.dart.strong.transformed.expect b/pkg/front_end/testcases/accessors.dart.strong.transformed.expect
index 69ee9a5..77ef07b 100644
--- a/pkg/front_end/testcases/accessors.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/accessors.dart.strong.transformed.expect
@@ -1,14 +1,31 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/accessors.dart:16:13: Error: Getter not found: 'onlySetter'.
 //       print(onlySetter);
 //             ^^^^^^^^^^
 //
+// pkg/front_end/testcases/accessors.dart:16:13: Error: The getter 'onlySetter' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/accessors.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'onlySetter'.
+//       print(onlySetter);
+//             ^^^^^^^^^^
+//
 // pkg/front_end/testcases/accessors.dart:25:11: Error: Getter not found: 'onlySetter'.
 //     print(onlySetter);
 //           ^^^^^^^^^^
-
-library;
+//
+// pkg/front_end/testcases/accessors.dart:25:11: Error: The getter 'onlySetter' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/accessors.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'onlySetter'.
+//     print(onlySetter);
+//           ^^^^^^^^^^
+//
+// pkg/front_end/testcases/accessors.dart:40:11: Error: Getter not found: 'onlySetter'.
+//     print(onlySetter);
+//           ^^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/ambiguous_exports.dart.legacy.expect b/pkg/front_end/testcases/ambiguous_exports.dart.legacy.expect
index c3c8517..9aadb02 100644
--- a/pkg/front_end/testcases/ambiguous_exports.dart.legacy.expect
+++ b/pkg/front_end/testcases/ambiguous_exports.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/ambiguous_exports.dart:7:1: Error: 'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.
-// export 'map.dart' show main;
-// ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/ambiguous_exports.dart:7:1: Error: 'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.
-// export 'map.dart' show main;
-// ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/ambiguous_exports.dart:7:1: Error: 'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.
+// export 'map.dart' show main;
+// ^
+//
 import self as self;
 
 static const field dynamic _exports# = "{\"main\":\"'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.\"}" /* from null */;
diff --git a/pkg/front_end/testcases/ambiguous_exports.dart.legacy.transformed.expect b/pkg/front_end/testcases/ambiguous_exports.dart.legacy.transformed.expect
index b993c56..9aadb02 100644
--- a/pkg/front_end/testcases/ambiguous_exports.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/ambiguous_exports.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/ambiguous_exports.dart:7:1: Error: 'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.
 // export 'map.dart' show main;
 // ^
-
-library;
+//
 import self as self;
 
 static const field dynamic _exports# = "{\"main\":\"'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.\"}" /* from null */;
diff --git a/pkg/front_end/testcases/ambiguous_exports.dart.outline.expect b/pkg/front_end/testcases/ambiguous_exports.dart.outline.expect
index dc412d7..9aadb02 100644
--- a/pkg/front_end/testcases/ambiguous_exports.dart.outline.expect
+++ b/pkg/front_end/testcases/ambiguous_exports.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/ambiguous_exports.dart:7:1: Error: 'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.
 // export 'map.dart' show main;
 // ^
-
-library;
+//
 import self as self;
 
 static const field dynamic _exports# = "{\"main\":\"'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.\"}" /* from null */;
diff --git a/pkg/front_end/testcases/ambiguous_exports.dart.strong.expect b/pkg/front_end/testcases/ambiguous_exports.dart.strong.expect
index c3c8517..9aadb02 100644
--- a/pkg/front_end/testcases/ambiguous_exports.dart.strong.expect
+++ b/pkg/front_end/testcases/ambiguous_exports.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/ambiguous_exports.dart:7:1: Error: 'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.
-// export 'map.dart' show main;
-// ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/ambiguous_exports.dart:7:1: Error: 'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.
-// export 'map.dart' show main;
-// ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/ambiguous_exports.dart:7:1: Error: 'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.
+// export 'map.dart' show main;
+// ^
+//
 import self as self;
 
 static const field dynamic _exports# = "{\"main\":\"'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.\"}" /* from null */;
diff --git a/pkg/front_end/testcases/ambiguous_exports.dart.strong.transformed.expect b/pkg/front_end/testcases/ambiguous_exports.dart.strong.transformed.expect
index b993c56..9aadb02 100644
--- a/pkg/front_end/testcases/ambiguous_exports.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/ambiguous_exports.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/ambiguous_exports.dart:7:1: Error: 'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.
 // export 'map.dart' show main;
 // ^
-
-library;
+//
 import self as self;
 
 static const field dynamic _exports# = "{\"main\":\"'main' is exported from both 'pkg/front_end/testcases/hello.dart' and 'pkg/front_end/testcases/map.dart'.\"}" /* from null */;
diff --git a/pkg/front_end/testcases/annotation_eof.dart.legacy.expect b/pkg/front_end/testcases/annotation_eof.dart.legacy.expect
index 5acfc4b..b1392cc 100644
--- a/pkg/front_end/testcases/annotation_eof.dart.legacy.expect
+++ b/pkg/front_end/testcases/annotation_eof.dart.legacy.expect
@@ -1,12 +1,9 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/annotation_eof.dart:10:1: Error: Expected a declaration, but got ''.
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/annotation_eof.dart:10:1: Error: Expected a declaration, but got ''.
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/annotation_eof.dart:10:1: Error: Expected a declaration, but got ''.
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/annotation_eof.dart.legacy.transformed.expect b/pkg/front_end/testcases/annotation_eof.dart.legacy.transformed.expect
index 1be62d2..b1392cc 100644
--- a/pkg/front_end/testcases/annotation_eof.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/annotation_eof.dart.legacy.transformed.expect
@@ -1,8 +1,9 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/annotation_eof.dart:10:1: Error: Expected a declaration, but got ''.
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/annotation_eof.dart.outline.expect b/pkg/front_end/testcases/annotation_eof.dart.outline.expect
index 464bbee..92138e7 100644
--- a/pkg/front_end/testcases/annotation_eof.dart.outline.expect
+++ b/pkg/front_end/testcases/annotation_eof.dart.outline.expect
@@ -1,8 +1,9 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/annotation_eof.dart:10:1: Error: Expected a declaration, but got ''.
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/annotation_eof.dart.strong.expect b/pkg/front_end/testcases/annotation_eof.dart.strong.expect
index 5acfc4b..b1392cc 100644
--- a/pkg/front_end/testcases/annotation_eof.dart.strong.expect
+++ b/pkg/front_end/testcases/annotation_eof.dart.strong.expect
@@ -1,12 +1,9 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/annotation_eof.dart:10:1: Error: Expected a declaration, but got ''.
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/annotation_eof.dart:10:1: Error: Expected a declaration, but got ''.
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/annotation_eof.dart:10:1: Error: Expected a declaration, but got ''.
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/annotation_eof.dart.strong.transformed.expect b/pkg/front_end/testcases/annotation_eof.dart.strong.transformed.expect
index 1be62d2..b1392cc 100644
--- a/pkg/front_end/testcases/annotation_eof.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/annotation_eof.dart.strong.transformed.expect
@@ -1,8 +1,9 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/annotation_eof.dart:10:1: Error: Expected a declaration, but got ''.
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/argument_mismatch.dart.legacy.expect b/pkg/front_end/testcases/argument_mismatch.dart.legacy.expect
index 3716c84..d836fc0 100644
--- a/pkg/front_end/testcases/argument_mismatch.dart.legacy.expect
+++ b/pkg/front_end/testcases/argument_mismatch.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/argument_mismatch.dart:10:34: Warning: Too many positional arguments: 0 allowed, but 1 found.
 // Try removing the extra positional arguments.
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/argument_mismatch.dart:7:29: Context: Found this candidate, but the arguments don't match.
 // /*@context=CandidateFound*/ foo() {}
 //                             ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/argument_mismatch.dart.legacy.transformed.expect b/pkg/front_end/testcases/argument_mismatch.dart.legacy.transformed.expect
index 5f3f9aa..d836fc0 100644
--- a/pkg/front_end/testcases/argument_mismatch.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/argument_mismatch.dart.legacy.transformed.expect
@@ -1,4 +1,15 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/argument_mismatch.dart:10:34: Warning: Too many positional arguments: 0 allowed, but 1 found.
+// Try removing the extra positional arguments.
+//   /*@warning=MethodNotFound*/ foo(null);
+//                                  ^
+// pkg/front_end/testcases/argument_mismatch.dart:7:29: Context: Found this candidate, but the arguments don't match.
+// /*@context=CandidateFound*/ foo() {}
+//                             ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bad_setter_abstract.dart.legacy.expect b/pkg/front_end/testcases/bad_setter_abstract.dart.legacy.expect
index 80e3471..e84ce6f 100644
--- a/pkg/front_end/testcases/bad_setter_abstract.dart.legacy.expect
+++ b/pkg/front_end/testcases/bad_setter_abstract.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bad_setter_abstract.dart:5:8: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -37,20 +39,7 @@
 // pkg/front_end/testcases/bad_setter_abstract.dart:66:9: Warning: The class 'B' is abstract and can't be instantiated.
 //     new B();
 //         ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/bad_setter_abstract.dart:5:8: Error: Expected a function body or '=>'.
-// Try adding {}.
-// set b();
-//        ^
-//
-// pkg/front_end/testcases/bad_setter_abstract.dart:7:12: Error: Expected a function body or '=>'.
-// Try adding {}.
-// set c(x, y);
-//            ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bad_setter_abstract.dart.legacy.transformed.expect b/pkg/front_end/testcases/bad_setter_abstract.dart.legacy.transformed.expect
index cd9945f..e84ce6f 100644
--- a/pkg/front_end/testcases/bad_setter_abstract.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/bad_setter_abstract.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bad_setter_abstract.dart:5:8: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -9,8 +11,35 @@
 // Try adding {}.
 // set c(x, y);
 //            ^
-
-library;
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:5:6: Error: A setter should have exactly one formal parameter.
+// set b();
+//      ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:7:6: Error: A setter should have exactly one formal parameter.
+// set c(x, y);
+//      ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:10:8: Error: A setter should have exactly one formal parameter.
+//   set a();
+//        ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:11:8: Error: A setter should have exactly one formal parameter.
+//   set d(x, y);
+//        ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:15:8: Error: A setter should have exactly one formal parameter.
+//   set a();
+//        ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:16:8: Error: A setter should have exactly one formal parameter.
+//   set d(x, y);
+//        ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:66:9: Warning: The class 'B' is abstract and can't be instantiated.
+//     new B();
+//         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bad_setter_abstract.dart.outline.expect b/pkg/front_end/testcases/bad_setter_abstract.dart.outline.expect
index a9bb871..68dcc4d 100644
--- a/pkg/front_end/testcases/bad_setter_abstract.dart.outline.expect
+++ b/pkg/front_end/testcases/bad_setter_abstract.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bad_setter_abstract.dart:5:8: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -9,8 +11,7 @@
 // Try adding {}.
 // set c(x, y);
 //            ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bad_setter_abstract.dart.strong.expect b/pkg/front_end/testcases/bad_setter_abstract.dart.strong.expect
index 0334820..493d45f 100644
--- a/pkg/front_end/testcases/bad_setter_abstract.dart.strong.expect
+++ b/pkg/front_end/testcases/bad_setter_abstract.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bad_setter_abstract.dart:5:8: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -37,24 +39,7 @@
 // pkg/front_end/testcases/bad_setter_abstract.dart:66:9: Error: The class 'B' is abstract and can't be instantiated.
 //     new B();
 //         ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/bad_setter_abstract.dart:5:8: Error: Expected a function body or '=>'.
-// Try adding {}.
-// set b();
-//        ^
-//
-// pkg/front_end/testcases/bad_setter_abstract.dart:7:12: Error: Expected a function body or '=>'.
-// Try adding {}.
-// set c(x, y);
-//            ^
-//
-// pkg/front_end/testcases/bad_setter_abstract.dart:66:9: Error: The class 'B' is abstract and can't be instantiated.
-//     new B();
-//         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bad_setter_abstract.dart.strong.transformed.expect b/pkg/front_end/testcases/bad_setter_abstract.dart.strong.transformed.expect
index a9335aa..493d45f 100644
--- a/pkg/front_end/testcases/bad_setter_abstract.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/bad_setter_abstract.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bad_setter_abstract.dart:5:8: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -10,11 +12,34 @@
 // set c(x, y);
 //            ^
 //
+// pkg/front_end/testcases/bad_setter_abstract.dart:5:6: Error: A setter should have exactly one formal parameter.
+// set b();
+//      ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:7:6: Error: A setter should have exactly one formal parameter.
+// set c(x, y);
+//      ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:10:8: Error: A setter should have exactly one formal parameter.
+//   set a();
+//        ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:11:8: Error: A setter should have exactly one formal parameter.
+//   set d(x, y);
+//        ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:15:8: Error: A setter should have exactly one formal parameter.
+//   set a();
+//        ^
+//
+// pkg/front_end/testcases/bad_setter_abstract.dart:16:8: Error: A setter should have exactly one formal parameter.
+//   set d(x, y);
+//        ^
+//
 // pkg/front_end/testcases/bad_setter_abstract.dart:66:9: Error: The class 'B' is abstract and can't be instantiated.
 //     new B();
 //         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug21938.dart.strong.expect b/pkg/front_end/testcases/bug21938.dart.strong.expect
index 5e1d794..1d9accb 100644
--- a/pkg/front_end/testcases/bug21938.dart.strong.expect
+++ b/pkg/front_end/testcases/bug21938.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug21938.dart:10:4: Error: The method 'call' isn't defined for the class 'Object'.
 //  - 'Object' is from 'dart:core'.
@@ -17,8 +19,7 @@
 // Try correcting the name to the name of an existing method, or defining a method named 'call'.
 //   x. /*@error=UndefinedMethod*/ call();
 //                                 ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug30695.dart.legacy.expect b/pkg/front_end/testcases/bug30695.dart.legacy.expect
index d1a2129..139b859 100644
--- a/pkg/front_end/testcases/bug30695.dart.legacy.expect
+++ b/pkg/front_end/testcases/bug30695.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug30695.dart:11:3: Error: Can't declare a member that conflicts with an inherited one.
 //   foo() => 42;
@@ -6,14 +8,7 @@
 // pkg/front_end/testcases/bug30695.dart:6:7: Context: This is the inherited member.
 //   var foo = 42;
 //       ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/bug30695.dart:11:3: Error: Can't declare a member that conflicts with an inherited one.
-//   foo() => 42;
-//   ^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug30695.dart.legacy.transformed.expect b/pkg/front_end/testcases/bug30695.dart.legacy.transformed.expect
index 998f289..139b859 100644
--- a/pkg/front_end/testcases/bug30695.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/bug30695.dart.legacy.transformed.expect
@@ -1,10 +1,14 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug30695.dart:11:3: Error: Can't declare a member that conflicts with an inherited one.
 //   foo() => 42;
 //   ^^^
-
-library;
+// pkg/front_end/testcases/bug30695.dart:6:7: Context: This is the inherited member.
+//   var foo = 42;
+//       ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug30695.dart.outline.expect b/pkg/front_end/testcases/bug30695.dart.outline.expect
index a4ad123..81e64a5 100644
--- a/pkg/front_end/testcases/bug30695.dart.outline.expect
+++ b/pkg/front_end/testcases/bug30695.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug30695.dart:11:3: Error: Can't declare a member that conflicts with an inherited one.
 //   foo() => 42;
@@ -6,8 +8,7 @@
 // pkg/front_end/testcases/bug30695.dart:6:7: Context: This is the inherited member.
 //   var foo = 42;
 //       ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug30695.dart.strong.expect b/pkg/front_end/testcases/bug30695.dart.strong.expect
index 0252117..30a8c8a 100644
--- a/pkg/front_end/testcases/bug30695.dart.strong.expect
+++ b/pkg/front_end/testcases/bug30695.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug30695.dart:11:3: Error: Can't declare a member that conflicts with an inherited one.
 //   foo() => 42;
@@ -6,14 +8,7 @@
 // pkg/front_end/testcases/bug30695.dart:6:7: Context: This is the inherited member.
 //   var foo = 42;
 //       ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/bug30695.dart:11:3: Error: Can't declare a member that conflicts with an inherited one.
-//   foo() => 42;
-//   ^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug31124.dart.legacy.expect b/pkg/front_end/testcases/bug31124.dart.legacy.expect
index 90dd470..2e4b5ac 100644
--- a/pkg/front_end/testcases/bug31124.dart.legacy.expect
+++ b/pkg/front_end/testcases/bug31124.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug31124.dart:1:22: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -11,19 +13,7 @@
 // pkg/front_end/testcases/bug31124.dart:1:5: Context: Previous declaration of 'a'.
 // var a = () => 'b';a();
 //     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/bug31124.dart:1:22: Error: Expected a function body or '=>'.
-// Try adding {}.
-// var a = () => 'b';a();
-//                      ^
-//
-// pkg/front_end/testcases/bug31124.dart:1:19: Error: 'a' is already declared in this scope.
-// var a = () => 'b';a();
-//                   ^
-
-library;
 import self as self;
 
 static field dynamic a;
diff --git a/pkg/front_end/testcases/bug31124.dart.legacy.transformed.expect b/pkg/front_end/testcases/bug31124.dart.legacy.transformed.expect
index b75686c..2e4b5ac 100644
--- a/pkg/front_end/testcases/bug31124.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/bug31124.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug31124.dart:1:22: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -8,8 +10,10 @@
 // pkg/front_end/testcases/bug31124.dart:1:19: Error: 'a' is already declared in this scope.
 // var a = () => 'b';a();
 //                   ^
-
-library;
+// pkg/front_end/testcases/bug31124.dart:1:5: Context: Previous declaration of 'a'.
+// var a = () => 'b';a();
+//     ^
+//
 import self as self;
 
 static field dynamic a;
diff --git a/pkg/front_end/testcases/bug31124.dart.outline.expect b/pkg/front_end/testcases/bug31124.dart.outline.expect
index 6634364..2e4b5ac 100644
--- a/pkg/front_end/testcases/bug31124.dart.outline.expect
+++ b/pkg/front_end/testcases/bug31124.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug31124.dart:1:22: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/bug31124.dart:1:5: Context: Previous declaration of 'a'.
 // var a = () => 'b';a();
 //     ^
-
-library;
+//
 import self as self;
 
 static field dynamic a;
diff --git a/pkg/front_end/testcases/bug31124.dart.strong.expect b/pkg/front_end/testcases/bug31124.dart.strong.expect
index 71f519f..08413bb 100644
--- a/pkg/front_end/testcases/bug31124.dart.strong.expect
+++ b/pkg/front_end/testcases/bug31124.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug31124.dart:1:22: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -11,19 +13,7 @@
 // pkg/front_end/testcases/bug31124.dart:1:5: Context: Previous declaration of 'a'.
 // var a = () => 'b';a();
 //     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/bug31124.dart:1:22: Error: Expected a function body or '=>'.
-// Try adding {}.
-// var a = () => 'b';a();
-//                      ^
-//
-// pkg/front_end/testcases/bug31124.dart:1:19: Error: 'a' is already declared in this scope.
-// var a = () => 'b';a();
-//                   ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug31124.dart.strong.transformed.expect b/pkg/front_end/testcases/bug31124.dart.strong.transformed.expect
index 90fd8c8..08413bb 100644
--- a/pkg/front_end/testcases/bug31124.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/bug31124.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug31124.dart:1:22: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -8,8 +10,10 @@
 // pkg/front_end/testcases/bug31124.dart:1:19: Error: 'a' is already declared in this scope.
 // var a = () => 'b';a();
 //                   ^
-
-library;
+// pkg/front_end/testcases/bug31124.dart:1:5: Context: Previous declaration of 'a'.
+// var a = () => 'b';a();
+//     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug32414a.dart.strong.expect b/pkg/front_end/testcases/bug32414a.dart.strong.expect
index 5b9c638..6a9c726 100644
--- a/pkg/front_end/testcases/bug32414a.dart.strong.expect
+++ b/pkg/front_end/testcases/bug32414a.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug32414a.dart:10:7: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   b = 42;
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug32414a.dart.strong.transformed.expect b/pkg/front_end/testcases/bug32414a.dart.strong.transformed.expect
index 13b27e0..6a9c726 100644
--- a/pkg/front_end/testcases/bug32414a.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/bug32414a.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/bug32414a.dart:10:7: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   b = 42;
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug33298.dart.strong.expect b/pkg/front_end/testcases/bug33298.dart.strong.expect
index ec9f90e..05c9f38 100644
--- a/pkg/front_end/testcases/bug33298.dart.strong.expect
+++ b/pkg/front_end/testcases/bug33298.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/bug33298.dart:28:44: Error: The argument type 'T Function<T>(T)' can't be assigned to the parameter type 'dynamic Function(String)'.
 // Try changing the type of the parameter, or casting the argument to 'dynamic Function(String)'.
 //   List<String> list6 = ['a', 'b', 'c'].map(c).toList();
 //                                            ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/bug33298.dart.strong.transformed.expect b/pkg/front_end/testcases/bug33298.dart.strong.transformed.expect
index dd96420..05c9f38 100644
--- a/pkg/front_end/testcases/bug33298.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/bug33298.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/bug33298.dart:28:44: Error: The argument type 'T Function<T>(T)' can't be assigned to the parameter type 'dynamic Function(String)'.
+// Try changing the type of the parameter, or casting the argument to 'dynamic Function(String)'.
+//   List<String> list6 = ['a', 'b', 'c'].map(c).toList();
+//                                            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/call.dart.strong.expect b/pkg/front_end/testcases/call.dart.strong.expect
index 03a252d..56f00c1 100644
--- a/pkg/front_end/testcases/call.dart.strong.expect
+++ b/pkg/front_end/testcases/call.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/call.dart:29:31: Error: Cannot invoke an instance of 'CallableGetter' because it declares 'call' to be something other than a method.
 //  - 'CallableGetter' is from 'pkg/front_end/testcases/call.dart'.
@@ -43,42 +45,7 @@
 // Try changing 'call' to a method or explicitly invoke 'call'.
 //   var nothing9 = callableGetter();
 //                                ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/call.dart:34:25: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing1 = closure();
-//                         ^
-//
-// pkg/front_end/testcases/call.dart:35:30: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing2 = closure.call();
-//                              ^
-//
-// pkg/front_end/testcases/call.dart:36:35: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing3 = closure.call.call();
-//                                   ^
-//
-// pkg/front_end/testcases/call.dart:37:40: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing4 = closure.call.call.call();
-//                                        ^
-//
-// pkg/front_end/testcases/call.dart:39:26: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing5 = callable();
-//                          ^
-//
-// pkg/front_end/testcases/call.dart:40:31: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing6 = callable.call();
-//                               ^
-//
-// pkg/front_end/testcases/call.dart:41:36: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing7 = callable.call.call();
-//                                    ^
-//
-// pkg/front_end/testcases/call.dart:42:41: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing8 = callable.call.call.call();
-//                                         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/cascade.dart.strong.expect b/pkg/front_end/testcases/cascade.dart.strong.expect
index 9595c80..ad65f1c 100644
--- a/pkg/front_end/testcases/cascade.dart.strong.expect
+++ b/pkg/front_end/testcases/cascade.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/cascade.dart:26:5: Error: A value of type 'List<int>' can't be assigned to a variable of type 'int'.
 //  - 'List' is from 'dart:core'.
@@ -20,8 +22,7 @@
 // Try correcting the name to the name of an existing getter, or defining a getter or field named 'last'.
 //     ..[0].last.toString();
 //           ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/cascade.dart.strong.transformed.expect b/pkg/front_end/testcases/cascade.dart.strong.transformed.expect
index 896f686..65d6f3b 100644
--- a/pkg/front_end/testcases/cascade.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/cascade.dart.strong.transformed.expect
@@ -1,4 +1,28 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/cascade.dart:26:5: Error: A value of type 'List<int>' can't be assigned to a variable of type 'int'.
+//  - 'List' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     [1]
+//     ^
+//
+// pkg/front_end/testcases/cascade.dart:28:13: Error: The getter 'last' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'last'.
+//     ..first.last.toString()
+//             ^^^^
+//
+// pkg/front_end/testcases/cascade.dart:29:12: Error: The method '[]' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing method, or defining a method named '[]'.
+//     ..first[0].toString()
+//            ^^
+//
+// pkg/front_end/testcases/cascade.dart:30:11: Error: The getter 'last' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'last'.
+//     ..[0].last.toString();
+//           ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/check_deferred_as_check.dart.legacy.expect b/pkg/front_end/testcases/check_deferred_as_check.dart.legacy.expect
index e585f88..d82327a 100644
--- a/pkg/front_end/testcases/check_deferred_as_check.dart.legacy.expect
+++ b/pkg/front_end/testcases/check_deferred_as_check.dart.legacy.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/check_deferred_as_check.dart:9:8: Warning: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
 //  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
 // Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
 //   x as lib.C;
 //        ^^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/check_deferred_as_check.dart.legacy.transformed.expect b/pkg/front_end/testcases/check_deferred_as_check.dart.legacy.transformed.expect
index d17f162..d82327a 100644
--- a/pkg/front_end/testcases/check_deferred_as_check.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/check_deferred_as_check.dart.legacy.transformed.expect
@@ -1,4 +1,13 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/check_deferred_as_check.dart:9:8: Warning: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
+//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
+// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
+//   x as lib.C;
+//        ^^^^^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/check_deferred_as_check.dart.strong.expect b/pkg/front_end/testcases/check_deferred_as_check.dart.strong.expect
index 36f0884..9673cd5 100644
--- a/pkg/front_end/testcases/check_deferred_as_check.dart.strong.expect
+++ b/pkg/front_end/testcases/check_deferred_as_check.dart.strong.expect
@@ -1,20 +1,13 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/check_deferred_as_check.dart:9:8: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
-//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
-// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
-//   x as lib.C;
-//        ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/check_deferred_as_check.dart:9:8: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
-//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
-// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
-//   x as lib.C;
-//        ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/check_deferred_as_check.dart:9:8: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
+//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
+// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
+//   x as lib.C;
+//        ^^^^^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/check_deferred_as_check.dart.strong.transformed.expect b/pkg/front_end/testcases/check_deferred_as_check.dart.strong.transformed.expect
index 0535600..9673cd5 100644
--- a/pkg/front_end/testcases/check_deferred_as_check.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/check_deferred_as_check.dart.strong.transformed.expect
@@ -1,12 +1,13 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/check_deferred_as_check.dart:9:8: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
 //  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
 // Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
 //   x as lib.C;
 //        ^^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/check_deferred_is_check.dart.legacy.expect b/pkg/front_end/testcases/check_deferred_is_check.dart.legacy.expect
index 05661c8..5ab626d 100644
--- a/pkg/front_end/testcases/check_deferred_is_check.dart.legacy.expect
+++ b/pkg/front_end/testcases/check_deferred_is_check.dart.legacy.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/check_deferred_is_check.dart:9:14: Warning: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
 //  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
 // Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
 //   print(x is lib.C);
 //              ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/check_deferred_is_check.dart.legacy.transformed.expect b/pkg/front_end/testcases/check_deferred_is_check.dart.legacy.transformed.expect
index 8fa0c48..5ab626d 100644
--- a/pkg/front_end/testcases/check_deferred_is_check.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/check_deferred_is_check.dart.legacy.transformed.expect
@@ -1,4 +1,13 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/check_deferred_is_check.dart:9:14: Warning: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
+//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
+// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
+//   print(x is lib.C);
+//              ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/check_deferred_is_check.dart.strong.expect b/pkg/front_end/testcases/check_deferred_is_check.dart.strong.expect
index 1daf3c3..453749e 100644
--- a/pkg/front_end/testcases/check_deferred_is_check.dart.strong.expect
+++ b/pkg/front_end/testcases/check_deferred_is_check.dart.strong.expect
@@ -1,20 +1,13 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/check_deferred_is_check.dart:9:14: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
-//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
-// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
-//   print(x is lib.C);
-//              ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/check_deferred_is_check.dart:9:14: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
-//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
-// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
-//   print(x is lib.C);
-//              ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/check_deferred_is_check.dart:9:14: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
+//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
+// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
+//   print(x is lib.C);
+//              ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/check_deferred_is_check.dart.strong.transformed.expect b/pkg/front_end/testcases/check_deferred_is_check.dart.strong.transformed.expect
index 8065802..453749e 100644
--- a/pkg/front_end/testcases/check_deferred_is_check.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/check_deferred_is_check.dart.strong.transformed.expect
@@ -1,12 +1,13 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/check_deferred_is_check.dart:9:14: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
 //  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
 // Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
 //   print(x is lib.C);
 //              ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/check_deferred_type_declaration.dart.legacy.expect b/pkg/front_end/testcases/check_deferred_type_declaration.dart.legacy.expect
index a97b88b..c1e12a1 100644
--- a/pkg/front_end/testcases/check_deferred_type_declaration.dart.legacy.expect
+++ b/pkg/front_end/testcases/check_deferred_type_declaration.dart.legacy.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/check_deferred_type_declaration.dart:9:3: Warning: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
 //  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
 // Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
 //   lib.C x = null;
 //   ^^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/check_deferred_type_declaration.dart.legacy.transformed.expect b/pkg/front_end/testcases/check_deferred_type_declaration.dart.legacy.transformed.expect
index fe4fe2e..c1e12a1 100644
--- a/pkg/front_end/testcases/check_deferred_type_declaration.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/check_deferred_type_declaration.dart.legacy.transformed.expect
@@ -1,4 +1,13 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/check_deferred_type_declaration.dart:9:3: Warning: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
+//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
+// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
+//   lib.C x = null;
+//   ^^^^^
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/check_deferred_type_declaration.dart.strong.expect b/pkg/front_end/testcases/check_deferred_type_declaration.dart.strong.expect
index f52f89c..d0fe579 100644
--- a/pkg/front_end/testcases/check_deferred_type_declaration.dart.strong.expect
+++ b/pkg/front_end/testcases/check_deferred_type_declaration.dart.strong.expect
@@ -1,20 +1,13 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/check_deferred_type_declaration.dart:9:3: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
-//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
-// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
-//   lib.C x = null;
-//   ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/check_deferred_type_declaration.dart:9:3: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
-//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
-// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
-//   lib.C x = null;
-//   ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/check_deferred_type_declaration.dart:9:3: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
+//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
+// Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
+//   lib.C x = null;
+//   ^^^^^
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/check_deferred_type_declaration.dart.strong.transformed.expect b/pkg/front_end/testcases/check_deferred_type_declaration.dart.strong.transformed.expect
index 71debcb..d0fe579 100644
--- a/pkg/front_end/testcases/check_deferred_type_declaration.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/check_deferred_type_declaration.dart.strong.transformed.expect
@@ -1,12 +1,13 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/check_deferred_type_declaration.dart:9:3: Error: The type 'C' is deferred loaded via prefix 'lib' and can't be used as a type annotation.
 //  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
 // Try removing 'deferred' from the import of 'lib' or use a supertype of 'C' that isn't deferred.
 //   lib.C x = null;
 //   ^^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/circularity-via-initializing-formal.dart.strong.expect b/pkg/front_end/testcases/circularity-via-initializing-formal.dart.strong.expect
index 4dd15b2..f034fa3 100644
--- a/pkg/front_end/testcases/circularity-via-initializing-formal.dart.strong.expect
+++ b/pkg/front_end/testcases/circularity-via-initializing-formal.dart.strong.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/circularity-via-initializing-formal.dart:15:3: Error: Can't infer the type of 'C._circular': circularity found during type inference.
-// Specify the type explicitly.
-//   C._circular(this.f);
-//   ^^^^^^^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/circularity-via-initializing-formal.dart:15:3: Error: Can't infer the type of 'C._circular': circularity found during type inference.
-// Specify the type explicitly.
-//   C._circular(this.f);
-//   ^^^^^^^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/circularity-via-initializing-formal.dart:15:3: Error: Can't infer the type of 'C._circular': circularity found during type inference.
+// Specify the type explicitly.
+//   C._circular(this.f);
+//   ^^^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/circularity-via-initializing-formal.dart.strong.transformed.expect b/pkg/front_end/testcases/circularity-via-initializing-formal.dart.strong.transformed.expect
index 7ec754c..f034fa3 100644
--- a/pkg/front_end/testcases/circularity-via-initializing-formal.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/circularity-via-initializing-formal.dart.strong.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/circularity-via-initializing-formal.dart:15:3: Error: Can't infer the type of 'C._circular': circularity found during type inference.
 // Specify the type explicitly.
 //   C._circular(this.f);
 //   ^^^^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/clone_function_type.dart.legacy.expect b/pkg/front_end/testcases/clone_function_type.dart.legacy.expect
index ef2a4c6..3b90c1f 100644
--- a/pkg/front_end/testcases/clone_function_type.dart.legacy.expect
+++ b/pkg/front_end/testcases/clone_function_type.dart.legacy.expect
@@ -1,56 +1,31 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/clone_function_type.dart:22:51: Error: Expected an identifier, but got '}'.
-// class Fm1<Z> extends Object with Am1<Function({int}), Z> {}
-//                                                   ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:46:45: Error: Expected an identifier, but got '}'.
-// class Qm1<Z> = Object with Am1<Function({int}), Z>;
-//                                             ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:77:51: Error: Expected an identifier, but got '}'.
-// class Fm2<Z> extends Object with Am2<Function({int}), Z> {}
-//                                                   ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:105:45: Error: Expected an identifier, but got '}'.
-// class Qm2<Z> = Object with Am2<Function({int}), Z>;
-//                                             ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:134:28: Error: Expected an identifier, but got '}'.
-// typedef TdF = Function({int});
-//                            ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:190:34: Error: Expected an identifier, but got '}'.
-// class Ef1<X extends Function({int})> {
-//                                  ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/clone_function_type.dart:22:51: Error: Expected an identifier, but got '}'.
-// class Fm1<Z> extends Object with Am1<Function({int}), Z> {}
-//                                                   ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:46:45: Error: Expected an identifier, but got '}'.
-// class Qm1<Z> = Object with Am1<Function({int}), Z>;
-//                                             ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:77:51: Error: Expected an identifier, but got '}'.
-// class Fm2<Z> extends Object with Am2<Function({int}), Z> {}
-//                                                   ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:105:45: Error: Expected an identifier, but got '}'.
-// class Qm2<Z> = Object with Am2<Function({int}), Z>;
-//                                             ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:134:28: Error: Expected an identifier, but got '}'.
-// typedef TdF = Function({int});
-//                            ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:190:34: Error: Expected an identifier, but got '}'.
-// class Ef1<X extends Function({int})> {
-//                                  ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/clone_function_type.dart:22:51: Error: Expected an identifier, but got '}'.
+// class Fm1<Z> extends Object with Am1<Function({int}), Z> {}
+//                                                   ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:46:45: Error: Expected an identifier, but got '}'.
+// class Qm1<Z> = Object with Am1<Function({int}), Z>;
+//                                             ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:77:51: Error: Expected an identifier, but got '}'.
+// class Fm2<Z> extends Object with Am2<Function({int}), Z> {}
+//                                                   ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:105:45: Error: Expected an identifier, but got '}'.
+// class Qm2<Z> = Object with Am2<Function({int}), Z>;
+//                                             ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:134:28: Error: Expected an identifier, but got '}'.
+// typedef TdF = Function({int});
+//                            ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:190:34: Error: Expected an identifier, but got '}'.
+// class Ef1<X extends Function({int})> {
+//                                  ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/clone_function_type.dart.legacy.transformed.expect b/pkg/front_end/testcases/clone_function_type.dart.legacy.transformed.expect
index 5523c08..69865bd 100644
--- a/pkg/front_end/testcases/clone_function_type.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/clone_function_type.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/clone_function_type.dart:22:51: Error: Expected an identifier, but got '}'.
 // class Fm1<Z> extends Object with Am1<Function({int}), Z> {}
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/clone_function_type.dart:190:34: Error: Expected an identifier, but got '}'.
 // class Ef1<X extends Function({int})> {
 //                                  ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/clone_function_type.dart.outline.expect b/pkg/front_end/testcases/clone_function_type.dart.outline.expect
index 6d46fb3..38d30b8 100644
--- a/pkg/front_end/testcases/clone_function_type.dart.outline.expect
+++ b/pkg/front_end/testcases/clone_function_type.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/clone_function_type.dart:22:51: Error: Expected an identifier, but got '}'.
 // class Fm1<Z> extends Object with Am1<Function({int}), Z> {}
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/clone_function_type.dart:190:34: Error: Expected an identifier, but got '}'.
 // class Ef1<X extends Function({int})> {
 //                                  ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/clone_function_type.dart.strong.expect b/pkg/front_end/testcases/clone_function_type.dart.strong.expect
index 993f5a8..8263903 100644
--- a/pkg/front_end/testcases/clone_function_type.dart.strong.expect
+++ b/pkg/front_end/testcases/clone_function_type.dart.strong.expect
@@ -1,168 +1,99 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/clone_function_type.dart:22:51: Error: Expected an identifier, but got '}'.
-// class Fm1<Z> extends Object with Am1<Function({int}), Z> {}
-//                                                   ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:46:45: Error: Expected an identifier, but got '}'.
-// class Qm1<Z> = Object with Am1<Function({int}), Z>;
-//                                             ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:77:51: Error: Expected an identifier, but got '}'.
-// class Fm2<Z> extends Object with Am2<Function({int}), Z> {}
-//                                                   ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:105:45: Error: Expected an identifier, but got '}'.
-// class Qm2<Z> = Object with Am2<Function({int}), Z>;
-//                                             ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:134:28: Error: Expected an identifier, but got '}'.
-// typedef TdF = Function({int});
-//                            ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:190:34: Error: Expected an identifier, but got '}'.
-// class Ef1<X extends Function({int})> {
-//                                  ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:67:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
-// Try changing type arguments so that they conform to the bounds.
-// class Bm2<Z> extends Object with Am2<Function(int), Z> {}
-//       ^
-// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
-// class Am2<X extends Function(), Y> {}
-//           ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:70:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
-// Try changing type arguments so that they conform to the bounds.
-// class Cm2<Z> extends Object with Am2<Function(int x), Z> {}
-//       ^
-// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
-// class Am2<X extends Function(), Y> {}
-//           ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:86:7: Error: Type argument 'Function' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
-//  - 'Function' is from 'dart:core'.
-// Try changing type arguments so that they conform to the bounds.
-// class Jm2<Z> extends Object with Am2<Function, Z> {}
-//       ^
-// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
-// class Am2<X extends Function(), Y> {}
-//           ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:89:7: Error: Type argument 'dynamic Function(Function)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
-//  - 'Function' is from 'dart:core'.
-// Try changing type arguments so that they conform to the bounds.
-// class Km2<Z> extends Object with Am2<Function(Function Function), Z> {}
-//       ^
-// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
-// class Am2<X extends Function(), Y> {}
-//           ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:95:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Mm2'.
-// Try changing type arguments so that they conform to the bounds.
-// class Mm2<Z> = Object with Am2<Function(int), Z>;
-//       ^
-// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
-// class Am2<X extends Function(), Y> {}
-//           ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:98:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Nm2'.
-// Try changing type arguments so that they conform to the bounds.
-// class Nm2<Z> = Object with Am2<Function(int x), Z>;
-//       ^
-// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
-// class Am2<X extends Function(), Y> {}
-//           ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:114:7: Error: Type argument 'Function' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Um2'.
-//  - 'Function' is from 'dart:core'.
-// Try changing type arguments so that they conform to the bounds.
-// class Um2<Z> = Object with Am2<Function, Z>;
-//       ^
-// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
-// class Am2<X extends Function(), Y> {}
-//           ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:117:7: Error: Type argument 'dynamic Function(Function)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Vm2'.
-//  - 'Function' is from 'dart:core'.
-// Try changing type arguments so that they conform to the bounds.
-// class Vm2<Z> = Object with Am2<Function(Function Function), Z>;
-//       ^
-// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
-// class Am2<X extends Function(), Y> {}
-//           ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/clone_function_type.dart:22:51: Error: Expected an identifier, but got '}'.
-// class Fm1<Z> extends Object with Am1<Function({int}), Z> {}
-//                                                   ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:46:45: Error: Expected an identifier, but got '}'.
-// class Qm1<Z> = Object with Am1<Function({int}), Z>;
-//                                             ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:77:51: Error: Expected an identifier, but got '}'.
-// class Fm2<Z> extends Object with Am2<Function({int}), Z> {}
-//                                                   ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:105:45: Error: Expected an identifier, but got '}'.
-// class Qm2<Z> = Object with Am2<Function({int}), Z>;
-//                                             ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:134:28: Error: Expected an identifier, but got '}'.
-// typedef TdF = Function({int});
-//                            ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:190:34: Error: Expected an identifier, but got '}'.
-// class Ef1<X extends Function({int})> {
-//                                  ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:67:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
-// Try changing type arguments so that they conform to the bounds.
-// class Bm2<Z> extends Object with Am2<Function(int), Z> {}
-//       ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:70:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
-// Try changing type arguments so that they conform to the bounds.
-// class Cm2<Z> extends Object with Am2<Function(int x), Z> {}
-//       ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:86:7: Error: Type argument 'Function' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
-//  - 'Function' is from 'dart:core'.
-// Try changing type arguments so that they conform to the bounds.
-// class Jm2<Z> extends Object with Am2<Function, Z> {}
-//       ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:89:7: Error: Type argument 'dynamic Function(Function)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
-//  - 'Function' is from 'dart:core'.
-// Try changing type arguments so that they conform to the bounds.
-// class Km2<Z> extends Object with Am2<Function(Function Function), Z> {}
-//       ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:95:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Mm2'.
-// Try changing type arguments so that they conform to the bounds.
-// class Mm2<Z> = Object with Am2<Function(int), Z>;
-//       ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:98:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Nm2'.
-// Try changing type arguments so that they conform to the bounds.
-// class Nm2<Z> = Object with Am2<Function(int x), Z>;
-//       ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:114:7: Error: Type argument 'Function' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Um2'.
-//  - 'Function' is from 'dart:core'.
-// Try changing type arguments so that they conform to the bounds.
-// class Um2<Z> = Object with Am2<Function, Z>;
-//       ^
-//
-// pkg/front_end/testcases/clone_function_type.dart:117:7: Error: Type argument 'dynamic Function(Function)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Vm2'.
-//  - 'Function' is from 'dart:core'.
-// Try changing type arguments so that they conform to the bounds.
-// class Vm2<Z> = Object with Am2<Function(Function Function), Z>;
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/clone_function_type.dart:22:51: Error: Expected an identifier, but got '}'.
+// class Fm1<Z> extends Object with Am1<Function({int}), Z> {}
+//                                                   ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:46:45: Error: Expected an identifier, but got '}'.
+// class Qm1<Z> = Object with Am1<Function({int}), Z>;
+//                                             ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:77:51: Error: Expected an identifier, but got '}'.
+// class Fm2<Z> extends Object with Am2<Function({int}), Z> {}
+//                                                   ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:105:45: Error: Expected an identifier, but got '}'.
+// class Qm2<Z> = Object with Am2<Function({int}), Z>;
+//                                             ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:134:28: Error: Expected an identifier, but got '}'.
+// typedef TdF = Function({int});
+//                            ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:190:34: Error: Expected an identifier, but got '}'.
+// class Ef1<X extends Function({int})> {
+//                                  ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:67:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
+// Try changing type arguments so that they conform to the bounds.
+// class Bm2<Z> extends Object with Am2<Function(int), Z> {}
+//       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:70:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
+// Try changing type arguments so that they conform to the bounds.
+// class Cm2<Z> extends Object with Am2<Function(int x), Z> {}
+//       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:86:7: Error: Type argument 'Function' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
+//  - 'Function' is from 'dart:core'.
+// Try changing type arguments so that they conform to the bounds.
+// class Jm2<Z> extends Object with Am2<Function, Z> {}
+//       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:89:7: Error: Type argument 'dynamic Function(Function)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
+//  - 'Function' is from 'dart:core'.
+// Try changing type arguments so that they conform to the bounds.
+// class Km2<Z> extends Object with Am2<Function(Function Function), Z> {}
+//       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:95:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Mm2'.
+// Try changing type arguments so that they conform to the bounds.
+// class Mm2<Z> = Object with Am2<Function(int), Z>;
+//       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:98:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Nm2'.
+// Try changing type arguments so that they conform to the bounds.
+// class Nm2<Z> = Object with Am2<Function(int x), Z>;
+//       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:114:7: Error: Type argument 'Function' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Um2'.
+//  - 'Function' is from 'dart:core'.
+// Try changing type arguments so that they conform to the bounds.
+// class Um2<Z> = Object with Am2<Function, Z>;
+//       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
+//
+// pkg/front_end/testcases/clone_function_type.dart:117:7: Error: Type argument 'dynamic Function(Function)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Vm2'.
+//  - 'Function' is from 'dart:core'.
+// Try changing type arguments so that they conform to the bounds.
+// class Vm2<Z> = Object with Am2<Function(Function Function), Z>;
+//       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/clone_function_type.dart.strong.transformed.expect b/pkg/front_end/testcases/clone_function_type.dart.strong.transformed.expect
index 6c6a057..30416cc 100644
--- a/pkg/front_end/testcases/clone_function_type.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/clone_function_type.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/clone_function_type.dart:22:51: Error: Expected an identifier, but got '}'.
 // class Fm1<Z> extends Object with Am1<Function({int}), Z> {}
@@ -28,47 +30,70 @@
 // Try changing type arguments so that they conform to the bounds.
 // class Bm2<Z> extends Object with Am2<Function(int), Z> {}
 //       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
 //
 // pkg/front_end/testcases/clone_function_type.dart:70:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
 // Try changing type arguments so that they conform to the bounds.
 // class Cm2<Z> extends Object with Am2<Function(int x), Z> {}
 //       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
 //
 // pkg/front_end/testcases/clone_function_type.dart:86:7: Error: Type argument 'Function' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
 //  - 'Function' is from 'dart:core'.
 // Try changing type arguments so that they conform to the bounds.
 // class Jm2<Z> extends Object with Am2<Function, Z> {}
 //       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
 //
 // pkg/front_end/testcases/clone_function_type.dart:89:7: Error: Type argument 'dynamic Function(Function)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Object with Am2'.
 //  - 'Function' is from 'dart:core'.
 // Try changing type arguments so that they conform to the bounds.
 // class Km2<Z> extends Object with Am2<Function(Function Function), Z> {}
 //       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
 //
 // pkg/front_end/testcases/clone_function_type.dart:95:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Mm2'.
 // Try changing type arguments so that they conform to the bounds.
 // class Mm2<Z> = Object with Am2<Function(int), Z>;
 //       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
 //
 // pkg/front_end/testcases/clone_function_type.dart:98:7: Error: Type argument 'dynamic Function(int)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Nm2'.
 // Try changing type arguments so that they conform to the bounds.
 // class Nm2<Z> = Object with Am2<Function(int x), Z>;
 //       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
 //
 // pkg/front_end/testcases/clone_function_type.dart:114:7: Error: Type argument 'Function' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Um2'.
 //  - 'Function' is from 'dart:core'.
 // Try changing type arguments so that they conform to the bounds.
 // class Um2<Z> = Object with Am2<Function, Z>;
 //       ^
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
 //
 // pkg/front_end/testcases/clone_function_type.dart:117:7: Error: Type argument 'dynamic Function(Function)' doesn't conform to the bound 'dynamic Function()' of the type variable 'X' on 'Am2' in the supertype 'Am2' of class 'Vm2'.
 //  - 'Function' is from 'dart:core'.
 // Try changing type arguments so that they conform to the bounds.
 // class Vm2<Z> = Object with Am2<Function(Function Function), Z>;
 //       ^
-
-library;
+// pkg/front_end/testcases/clone_function_type.dart:64:11: Context: This is the type variable whose bound isn't conformed to.
+// class Am2<X extends Function(), Y> {}
+//           ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.legacy.expect b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.legacy.expect
index 7c45077..519be36 100644
--- a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.legacy.expect
+++ b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:21:1: Error: Expected '{' before this.
 // class B {}
@@ -10,18 +12,7 @@
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:16:7: Context: Previous declaration of 'A'.
 // class A {
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:21:1: Error: Expected '{' before this.
-// class B {}
-// ^^^^^
-//
-// pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:20:1: Error: 'A' is already declared in this scope.
-// A()
-// ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.legacy.transformed.expect b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.legacy.transformed.expect
index df8e79d..519be36 100644
--- a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:21:1: Error: Expected '{' before this.
 // class B {}
@@ -7,8 +9,10 @@
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:20:1: Error: 'A' is already declared in this scope.
 // A()
 // ^
-
-library;
+// pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:16:7: Context: Previous declaration of 'A'.
+// class A {
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.outline.expect b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.outline.expect
index 0091954..ea4f386 100644
--- a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.outline.expect
+++ b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:21:1: Error: Expected '{' before this.
 // class B {}
@@ -10,8 +12,7 @@
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:16:7: Context: Previous declaration of 'A'.
 // class A {
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.strong.expect b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.strong.expect
index 7c45077..519be36 100644
--- a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.strong.expect
+++ b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:21:1: Error: Expected '{' before this.
 // class B {}
@@ -10,18 +12,7 @@
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:16:7: Context: Previous declaration of 'A'.
 // class A {
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:21:1: Error: Expected '{' before this.
-// class B {}
-// ^^^^^
-//
-// pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:20:1: Error: 'A' is already declared in this scope.
-// A()
-// ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.strong.transformed.expect b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.strong.transformed.expect
index df8e79d..519be36 100644
--- a/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:21:1: Error: Expected '{' before this.
 // class B {}
@@ -7,8 +9,10 @@
 // pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:20:1: Error: 'A' is already declared in this scope.
 // A()
 // ^
-
-library;
+// pkg/front_end/testcases/co19_language_metadata_syntax_t04.dart:16:7: Context: Previous declaration of 'A'.
+// class A {
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/constructor_cycle.dart.legacy.expect b/pkg/front_end/testcases/constructor_cycle.dart.legacy.expect
index a2ba137..e972c9c 100644
--- a/pkg/front_end/testcases/constructor_cycle.dart.legacy.expect
+++ b/pkg/front_end/testcases/constructor_cycle.dart.legacy.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/constructor_cycle.dart:7:18: Error: Redirecting constructers can't be cyclic.
-// Try to have all constructors eventually redirect to a non-redirecting constructor.
-//   A.bar() : this.foo();
-//                  ^^^
-//
-// pkg/front_end/testcases/constructor_cycle.dart:9:9: Error: Redirecting constructers can't be cyclic.
-// Try to have all constructors eventually redirect to a non-redirecting constructor.
-//   A() : this();
-//         ^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/constructor_cycle.dart:7:18: Error: Redirecting constructers can't be cyclic.
-// Try to have all constructors eventually redirect to a non-redirecting constructor.
-//   A.bar() : this.foo();
-//                  ^^^
-//
-// pkg/front_end/testcases/constructor_cycle.dart:9:9: Error: Redirecting constructers can't be cyclic.
-// Try to have all constructors eventually redirect to a non-redirecting constructor.
-//   A() : this();
-//         ^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/constructor_cycle.dart:7:18: Error: Redirecting constructers can't be cyclic.
+// Try to have all constructors eventually redirect to a non-redirecting constructor.
+//   A.bar() : this.foo();
+//                  ^^^
+//
+// pkg/front_end/testcases/constructor_cycle.dart:9:9: Error: Redirecting constructers can't be cyclic.
+// Try to have all constructors eventually redirect to a non-redirecting constructor.
+//   A() : this();
+//         ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/constructor_cycle.dart.legacy.transformed.expect b/pkg/front_end/testcases/constructor_cycle.dart.legacy.transformed.expect
index 89c1886..e972c9c 100644
--- a/pkg/front_end/testcases/constructor_cycle.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/constructor_cycle.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/constructor_cycle.dart:7:18: Error: Redirecting constructers can't be cyclic.
 // Try to have all constructors eventually redirect to a non-redirecting constructor.
@@ -9,8 +11,7 @@
 // Try to have all constructors eventually redirect to a non-redirecting constructor.
 //   A() : this();
 //         ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/constructor_cycle.dart.strong.expect b/pkg/front_end/testcases/constructor_cycle.dart.strong.expect
index a2ba137..e972c9c 100644
--- a/pkg/front_end/testcases/constructor_cycle.dart.strong.expect
+++ b/pkg/front_end/testcases/constructor_cycle.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/constructor_cycle.dart:7:18: Error: Redirecting constructers can't be cyclic.
-// Try to have all constructors eventually redirect to a non-redirecting constructor.
-//   A.bar() : this.foo();
-//                  ^^^
-//
-// pkg/front_end/testcases/constructor_cycle.dart:9:9: Error: Redirecting constructers can't be cyclic.
-// Try to have all constructors eventually redirect to a non-redirecting constructor.
-//   A() : this();
-//         ^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/constructor_cycle.dart:7:18: Error: Redirecting constructers can't be cyclic.
-// Try to have all constructors eventually redirect to a non-redirecting constructor.
-//   A.bar() : this.foo();
-//                  ^^^
-//
-// pkg/front_end/testcases/constructor_cycle.dart:9:9: Error: Redirecting constructers can't be cyclic.
-// Try to have all constructors eventually redirect to a non-redirecting constructor.
-//   A() : this();
-//         ^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/constructor_cycle.dart:7:18: Error: Redirecting constructers can't be cyclic.
+// Try to have all constructors eventually redirect to a non-redirecting constructor.
+//   A.bar() : this.foo();
+//                  ^^^
+//
+// pkg/front_end/testcases/constructor_cycle.dart:9:9: Error: Redirecting constructers can't be cyclic.
+// Try to have all constructors eventually redirect to a non-redirecting constructor.
+//   A() : this();
+//         ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/constructor_cycle.dart.strong.transformed.expect b/pkg/front_end/testcases/constructor_cycle.dart.strong.transformed.expect
index 89c1886..e972c9c 100644
--- a/pkg/front_end/testcases/constructor_cycle.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/constructor_cycle.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/constructor_cycle.dart:7:18: Error: Redirecting constructers can't be cyclic.
 // Try to have all constructors eventually redirect to a non-redirecting constructor.
@@ -9,8 +11,7 @@
 // Try to have all constructors eventually redirect to a non-redirecting constructor.
 //   A() : this();
 //         ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/constructor_initializer_invalid.dart.legacy.expect b/pkg/front_end/testcases/constructor_initializer_invalid.dart.legacy.expect
index 6b42a4b..af3c198 100644
--- a/pkg/front_end/testcases/constructor_initializer_invalid.dart.legacy.expect
+++ b/pkg/front_end/testcases/constructor_initializer_invalid.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/constructor_initializer_invalid.dart:5:24: Error: Expected an initializer.
 // class C1 { int f; C1() : ; }
@@ -17,24 +19,7 @@
 // pkg/front_end/testcases/constructor_initializer_invalid.dart:7:26: Error: Can't access 'this' in a field initializer to read 'f'.
 // class C3 { int f; C3() : f++; }
 //                          ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/constructor_initializer_invalid.dart:5:24: Error: Expected an initializer.
-// class C1 { int f; C1() : ; }
-//                        ^
-//
-// pkg/front_end/testcases/constructor_initializer_invalid.dart:6:26: Error: Expected an assignment after the field name.
-// To initialize a field, use the syntax 'name = value'.
-// class C2 { int f; C2() : f; }
-//                          ^
-//
-// pkg/front_end/testcases/constructor_initializer_invalid.dart:7:26: Error: Expected an assignment after the field name.
-// To initialize a field, use the syntax 'name = value'.
-// class C3 { int f; C3() : f++; }
-//                          ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/constructor_initializer_invalid.dart.legacy.transformed.expect b/pkg/front_end/testcases/constructor_initializer_invalid.dart.legacy.transformed.expect
index 8d747d5..af3c198 100644
--- a/pkg/front_end/testcases/constructor_initializer_invalid.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/constructor_initializer_invalid.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/constructor_initializer_invalid.dart:5:24: Error: Expected an initializer.
 // class C1 { int f; C1() : ; }
@@ -13,8 +15,11 @@
 // To initialize a field, use the syntax 'name = value'.
 // class C3 { int f; C3() : f++; }
 //                          ^
-
-library;
+//
+// pkg/front_end/testcases/constructor_initializer_invalid.dart:7:26: Error: Can't access 'this' in a field initializer to read 'f'.
+// class C3 { int f; C3() : f++; }
+//                          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/constructor_initializer_invalid.dart.outline.expect b/pkg/front_end/testcases/constructor_initializer_invalid.dart.outline.expect
index 407b220..38148ab 100644
--- a/pkg/front_end/testcases/constructor_initializer_invalid.dart.outline.expect
+++ b/pkg/front_end/testcases/constructor_initializer_invalid.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/constructor_initializer_invalid.dart:5:24: Error: Expected an initializer.
 // class C1 { int f; C1() : ; }
@@ -13,8 +15,7 @@
 // To initialize a field, use the syntax 'name = value'.
 // class C3 { int f; C3() : f++; }
 //                          ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/constructor_initializer_invalid.dart.strong.expect b/pkg/front_end/testcases/constructor_initializer_invalid.dart.strong.expect
index 5e45093..eb5062e 100644
--- a/pkg/front_end/testcases/constructor_initializer_invalid.dart.strong.expect
+++ b/pkg/front_end/testcases/constructor_initializer_invalid.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/constructor_initializer_invalid.dart:5:24: Error: Expected an initializer.
 // class C1 { int f; C1() : ; }
@@ -17,24 +19,7 @@
 // pkg/front_end/testcases/constructor_initializer_invalid.dart:7:26: Error: Can't access 'this' in a field initializer to read 'f'.
 // class C3 { int f; C3() : f++; }
 //                          ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/constructor_initializer_invalid.dart:5:24: Error: Expected an initializer.
-// class C1 { int f; C1() : ; }
-//                        ^
-//
-// pkg/front_end/testcases/constructor_initializer_invalid.dart:6:26: Error: Expected an assignment after the field name.
-// To initialize a field, use the syntax 'name = value'.
-// class C2 { int f; C2() : f; }
-//                          ^
-//
-// pkg/front_end/testcases/constructor_initializer_invalid.dart:7:26: Error: Expected an assignment after the field name.
-// To initialize a field, use the syntax 'name = value'.
-// class C3 { int f; C3() : f++; }
-//                          ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/constructor_initializer_invalid.dart.strong.transformed.expect b/pkg/front_end/testcases/constructor_initializer_invalid.dart.strong.transformed.expect
index bfe868c..eb5062e 100644
--- a/pkg/front_end/testcases/constructor_initializer_invalid.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/constructor_initializer_invalid.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/constructor_initializer_invalid.dart:5:24: Error: Expected an initializer.
 // class C1 { int f; C1() : ; }
@@ -13,8 +15,11 @@
 // To initialize a field, use the syntax 'name = value'.
 // class C3 { int f; C3() : f++; }
 //                          ^
-
-library;
+//
+// pkg/front_end/testcases/constructor_initializer_invalid.dart:7:26: Error: Can't access 'this' in a field initializer to read 'f'.
+// class C3 { int f; C3() : f++; }
+//                          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/continue_inference_after_error.dart.legacy.expect b/pkg/front_end/testcases/continue_inference_after_error.dart.legacy.expect
index f613c96..736cc06 100644
--- a/pkg/front_end/testcases/continue_inference_after_error.dart.legacy.expect
+++ b/pkg/front_end/testcases/continue_inference_after_error.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/continue_inference_after_error.dart:10:3: Error: A prefix can't be used as an expression.
 //   lib(new C().missing());
 //   ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/continue_inference_after_error.dart.legacy.transformed.expect b/pkg/front_end/testcases/continue_inference_after_error.dart.legacy.transformed.expect
index fab5a56..736cc06 100644
--- a/pkg/front_end/testcases/continue_inference_after_error.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/continue_inference_after_error.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/continue_inference_after_error.dart:10:3: Error: A prefix can't be used as an expression.
+//   lib(new C().missing());
+//   ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/continue_inference_after_error.dart.strong.expect b/pkg/front_end/testcases/continue_inference_after_error.dart.strong.expect
index 861dd2f..0cc9a03 100644
--- a/pkg/front_end/testcases/continue_inference_after_error.dart.strong.expect
+++ b/pkg/front_end/testcases/continue_inference_after_error.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/continue_inference_after_error.dart:10:3: Error: A prefix can't be used as an expression.
 //   lib(new C().missing());
@@ -9,8 +11,7 @@
 // Try correcting the name to the name of an existing method, or defining a method named 'missing'.
 //   lib(new C().missing());
 //               ^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/continue_inference_after_error.dart.strong.transformed.expect b/pkg/front_end/testcases/continue_inference_after_error.dart.strong.transformed.expect
index 80d02fa..3b86ae4 100644
--- a/pkg/front_end/testcases/continue_inference_after_error.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/continue_inference_after_error.dart.strong.transformed.expect
@@ -1,4 +1,17 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/continue_inference_after_error.dart:10:3: Error: A prefix can't be used as an expression.
+//   lib(new C().missing());
+//   ^^^
+//
+// pkg/front_end/testcases/continue_inference_after_error.dart:10:15: Error: The method 'missing' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/continue_inference_after_error.dart'.
+// Try correcting the name to the name of an existing method, or defining a method named 'missing'.
+//   lib(new C().missing());
+//               ^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/cycles.dart.legacy.expect b/pkg/front_end/testcases/cycles.dart.legacy.expect
index 4ee0331..74c43d4 100644
--- a/pkg/front_end/testcases/cycles.dart.legacy.expect
+++ b/pkg/front_end/testcases/cycles.dart.legacy.expect
@@ -1,32 +1,19 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/cycles.dart:5:7: Error: 'A' is a supertype of itself.
-// class A implements C {}
-//       ^
-//
-// pkg/front_end/testcases/cycles.dart:7:7: Error: 'B' is a supertype of itself.
-// class B extends A {}
-//       ^
-//
-// pkg/front_end/testcases/cycles.dart:9:7: Error: 'C' is a supertype of itself.
-// class C extends B implements D {}
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/cycles.dart:5:7: Error: 'A' is a supertype of itself.
-// class A implements C {}
-//       ^
-//
-// pkg/front_end/testcases/cycles.dart:7:7: Error: 'B' is a supertype of itself.
-// class B extends A {}
-//       ^
-//
-// pkg/front_end/testcases/cycles.dart:9:7: Error: 'C' is a supertype of itself.
-// class C extends B implements D {}
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/cycles.dart:5:7: Error: 'A' is a supertype of itself.
+// class A implements C {}
+//       ^
+//
+// pkg/front_end/testcases/cycles.dart:7:7: Error: 'B' is a supertype of itself.
+// class B extends A {}
+//       ^
+//
+// pkg/front_end/testcases/cycles.dart:9:7: Error: 'C' is a supertype of itself.
+// class C extends B implements D {}
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/cycles.dart.legacy.transformed.expect b/pkg/front_end/testcases/cycles.dart.legacy.transformed.expect
index 08a24b3..74c43d4 100644
--- a/pkg/front_end/testcases/cycles.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/cycles.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/cycles.dart:5:7: Error: 'A' is a supertype of itself.
 // class A implements C {}
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/cycles.dart:9:7: Error: 'C' is a supertype of itself.
 // class C extends B implements D {}
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/cycles.dart.outline.expect b/pkg/front_end/testcases/cycles.dart.outline.expect
index b1b0614..6c6bd27 100644
--- a/pkg/front_end/testcases/cycles.dart.outline.expect
+++ b/pkg/front_end/testcases/cycles.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/cycles.dart:5:7: Error: 'A' is a supertype of itself.
 // class A implements C {}
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/cycles.dart:9:7: Error: 'C' is a supertype of itself.
 // class C extends B implements D {}
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/cycles.dart.strong.expect b/pkg/front_end/testcases/cycles.dart.strong.expect
index 4ee0331..74c43d4 100644
--- a/pkg/front_end/testcases/cycles.dart.strong.expect
+++ b/pkg/front_end/testcases/cycles.dart.strong.expect
@@ -1,32 +1,19 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/cycles.dart:5:7: Error: 'A' is a supertype of itself.
-// class A implements C {}
-//       ^
-//
-// pkg/front_end/testcases/cycles.dart:7:7: Error: 'B' is a supertype of itself.
-// class B extends A {}
-//       ^
-//
-// pkg/front_end/testcases/cycles.dart:9:7: Error: 'C' is a supertype of itself.
-// class C extends B implements D {}
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/cycles.dart:5:7: Error: 'A' is a supertype of itself.
-// class A implements C {}
-//       ^
-//
-// pkg/front_end/testcases/cycles.dart:7:7: Error: 'B' is a supertype of itself.
-// class B extends A {}
-//       ^
-//
-// pkg/front_end/testcases/cycles.dart:9:7: Error: 'C' is a supertype of itself.
-// class C extends B implements D {}
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/cycles.dart:5:7: Error: 'A' is a supertype of itself.
+// class A implements C {}
+//       ^
+//
+// pkg/front_end/testcases/cycles.dart:7:7: Error: 'B' is a supertype of itself.
+// class B extends A {}
+//       ^
+//
+// pkg/front_end/testcases/cycles.dart:9:7: Error: 'C' is a supertype of itself.
+// class C extends B implements D {}
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/cycles.dart.strong.transformed.expect b/pkg/front_end/testcases/cycles.dart.strong.transformed.expect
index 08a24b3..74c43d4 100644
--- a/pkg/front_end/testcases/cycles.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/cycles.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/cycles.dart:5:7: Error: 'A' is a supertype of itself.
 // class A implements C {}
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/cycles.dart:9:7: Error: 'C' is a supertype of itself.
 // class C extends B implements D {}
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/deferred_type_annotation.dart.legacy.expect b/pkg/front_end/testcases/deferred_type_annotation.dart.legacy.expect
index a826409..a8167e7 100644
--- a/pkg/front_end/testcases/deferred_type_annotation.dart.legacy.expect
+++ b/pkg/front_end/testcases/deferred_type_annotation.dart.legacy.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/deferred_type_annotation.dart:7:5: Warning: The type 'C' is deferred loaded via prefix 'd' and can't be used as a type annotation.
 //  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
 // Try removing 'deferred' from the import of 'd' or use a supertype of 'C' that isn't deferred.
 // bad(d.C x) {}
 //     ^^^
-
-library;
+//
 import self as self;
 import "./deferred_lib.dart" as def;
 
diff --git a/pkg/front_end/testcases/deferred_type_annotation.dart.legacy.transformed.expect b/pkg/front_end/testcases/deferred_type_annotation.dart.legacy.transformed.expect
index 8e7b027..a8167e7 100644
--- a/pkg/front_end/testcases/deferred_type_annotation.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/deferred_type_annotation.dart.legacy.transformed.expect
@@ -1,4 +1,13 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/deferred_type_annotation.dart:7:5: Warning: The type 'C' is deferred loaded via prefix 'd' and can't be used as a type annotation.
+//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
+// Try removing 'deferred' from the import of 'd' or use a supertype of 'C' that isn't deferred.
+// bad(d.C x) {}
+//     ^^^
+//
 import self as self;
 import "./deferred_lib.dart" as def;
 
diff --git a/pkg/front_end/testcases/deferred_type_annotation.dart.strong.expect b/pkg/front_end/testcases/deferred_type_annotation.dart.strong.expect
index f58ad49..206a2d8 100644
--- a/pkg/front_end/testcases/deferred_type_annotation.dart.strong.expect
+++ b/pkg/front_end/testcases/deferred_type_annotation.dart.strong.expect
@@ -1,20 +1,13 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/deferred_type_annotation.dart:7:5: Error: The type 'C' is deferred loaded via prefix 'd' and can't be used as a type annotation.
-//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
-// Try removing 'deferred' from the import of 'd' or use a supertype of 'C' that isn't deferred.
-// bad(d.C x) {}
-//     ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/deferred_type_annotation.dart:7:5: Error: The type 'C' is deferred loaded via prefix 'd' and can't be used as a type annotation.
-//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
-// Try removing 'deferred' from the import of 'd' or use a supertype of 'C' that isn't deferred.
-// bad(d.C x) {}
-//     ^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/deferred_type_annotation.dart:7:5: Error: The type 'C' is deferred loaded via prefix 'd' and can't be used as a type annotation.
+//  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
+// Try removing 'deferred' from the import of 'd' or use a supertype of 'C' that isn't deferred.
+// bad(d.C x) {}
+//     ^^^
+//
 import self as self;
 import "./deferred_lib.dart" as def;
 
diff --git a/pkg/front_end/testcases/deferred_type_annotation.dart.strong.transformed.expect b/pkg/front_end/testcases/deferred_type_annotation.dart.strong.transformed.expect
index 6bfd545..206a2d8 100644
--- a/pkg/front_end/testcases/deferred_type_annotation.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/deferred_type_annotation.dart.strong.transformed.expect
@@ -1,12 +1,13 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/deferred_type_annotation.dart:7:5: Error: The type 'C' is deferred loaded via prefix 'd' and can't be used as a type annotation.
 //  - 'C' is from 'pkg/front_end/testcases/deferred_lib.dart'.
 // Try removing 'deferred' from the import of 'd' or use a supertype of 'C' that isn't deferred.
 // bad(d.C x) {}
 //     ^^^
-
-library;
+//
 import self as self;
 import "./deferred_lib.dart" as def;
 
diff --git a/pkg/front_end/testcases/duplicated_bad_prefix.dart.legacy.expect b/pkg/front_end/testcases/duplicated_bad_prefix.dart.legacy.expect
index bb80ade..2c360d3 100644
--- a/pkg/front_end/testcases/duplicated_bad_prefix.dart.legacy.expect
+++ b/pkg/front_end/testcases/duplicated_bad_prefix.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:10:7: Error: 'Dupe' is already declared in this scope.
 // class Dupe {}
@@ -18,14 +20,7 @@
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:13:3: Warning: 'Dupe.a' isn't a type.
 //   Dupe.a b;
 //   ^^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/duplicated_bad_prefix.dart:10:7: Error: 'Dupe' is already declared in this scope.
-// class Dupe {}
-//       ^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_bad_prefix.dart.legacy.transformed.expect b/pkg/front_end/testcases/duplicated_bad_prefix.dart.legacy.transformed.expect
index c095d13..2c360d3 100644
--- a/pkg/front_end/testcases/duplicated_bad_prefix.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/duplicated_bad_prefix.dart.legacy.transformed.expect
@@ -1,10 +1,26 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:10:7: Error: 'Dupe' is already declared in this scope.
 // class Dupe {}
 //       ^^^^
-
-library;
+// pkg/front_end/testcases/duplicated_bad_prefix.dart:8:7: Context: Previous declaration of 'Dupe'.
+// class Dupe {}
+//       ^^^^
+//
+// pkg/front_end/testcases/duplicated_bad_prefix.dart:13:3: Warning: Type 'Dupe.a' not found.
+//   Dupe.a b;
+//   ^^^^^^
+//
+// pkg/front_end/testcases/duplicated_bad_prefix.dart:6:45: Warning: 'C' is imported from both 'pkg/front_end/testcases/duplicated_bad_prefix_lib1.dart' and 'pkg/front_end/testcases/duplicated_bad_prefix_lib2.dart'.
+// import 'duplicated_bad_prefix_lib2.dart' as dupe;
+//                                             ^
+//
+// pkg/front_end/testcases/duplicated_bad_prefix.dart:13:3: Warning: 'Dupe.a' isn't a type.
+//   Dupe.a b;
+//   ^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_bad_prefix.dart.outline.expect b/pkg/front_end/testcases/duplicated_bad_prefix.dart.outline.expect
index 28dac21..0b95d4c 100644
--- a/pkg/front_end/testcases/duplicated_bad_prefix.dart.outline.expect
+++ b/pkg/front_end/testcases/duplicated_bad_prefix.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:10:7: Error: 'Dupe' is already declared in this scope.
 // class Dupe {}
@@ -14,8 +16,7 @@
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:6:45: Warning: 'C' is imported from both 'pkg/front_end/testcases/duplicated_bad_prefix_lib1.dart' and 'pkg/front_end/testcases/duplicated_bad_prefix_lib2.dart'.
 // import 'duplicated_bad_prefix_lib2.dart' as dupe;
 //                                             ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_bad_prefix.dart.strong.expect b/pkg/front_end/testcases/duplicated_bad_prefix.dart.strong.expect
index a2b97c5..7f6a69d 100644
--- a/pkg/front_end/testcases/duplicated_bad_prefix.dart.strong.expect
+++ b/pkg/front_end/testcases/duplicated_bad_prefix.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:10:7: Error: 'Dupe' is already declared in this scope.
 // class Dupe {}
@@ -18,26 +20,7 @@
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:13:3: Error: 'Dupe.a' isn't a type.
 //   Dupe.a b;
 //   ^^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/duplicated_bad_prefix.dart:10:7: Error: 'Dupe' is already declared in this scope.
-// class Dupe {}
-//       ^^^^
-//
-// pkg/front_end/testcases/duplicated_bad_prefix.dart:13:3: Error: Type 'Dupe.a' not found.
-//   Dupe.a b;
-//   ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_bad_prefix.dart:6:45: Error: 'C' is imported from both 'pkg/front_end/testcases/duplicated_bad_prefix_lib1.dart' and 'pkg/front_end/testcases/duplicated_bad_prefix_lib2.dart'.
-// import 'duplicated_bad_prefix_lib2.dart' as dupe;
-//                                             ^
-//
-// pkg/front_end/testcases/duplicated_bad_prefix.dart:13:3: Error: 'Dupe.a' isn't a type.
-//   Dupe.a b;
-//   ^^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_bad_prefix.dart.strong.transformed.expect b/pkg/front_end/testcases/duplicated_bad_prefix.dart.strong.transformed.expect
index ff27603..7f6a69d 100644
--- a/pkg/front_end/testcases/duplicated_bad_prefix.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/duplicated_bad_prefix.dart.strong.transformed.expect
@@ -1,8 +1,13 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:10:7: Error: 'Dupe' is already declared in this scope.
 // class Dupe {}
 //       ^^^^
+// pkg/front_end/testcases/duplicated_bad_prefix.dart:8:7: Context: Previous declaration of 'Dupe'.
+// class Dupe {}
+//       ^^^^
 //
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:13:3: Error: Type 'Dupe.a' not found.
 //   Dupe.a b;
@@ -15,8 +20,7 @@
 // pkg/front_end/testcases/duplicated_bad_prefix.dart:13:3: Error: 'Dupe.a' isn't a type.
 //   Dupe.a b;
 //   ^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_declarations.dart.legacy.expect b/pkg/front_end/testcases/duplicated_declarations.dart.legacy.expect
index f387607..6b70b72 100644
--- a/pkg/front_end/testcases/duplicated_declarations.dart.legacy.expect
+++ b/pkg/front_end/testcases/duplicated_declarations.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:7:1: Error: Import directives must preceed part directives.
 // Try moving the import directives before the part directives.
@@ -124,15 +126,12 @@
 // enum AnotherEnum {
 //      ^^^^^^^^^^^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:7:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:9:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
+// typedef Typedef = void Function();
+//         ^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:13:9: Context: Previous declaration of 'Typedef'.
+// typedef Typedef = Object Function();
+//         ^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:13:9: Error: 'Typedef' is already declared in this scope.
 // typedef Typedef = Object Function();
@@ -141,10 +140,12 @@
 // typedef Typedef = void Function();
 //         ^^^^^^^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:15:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
+// typedef void OldTypedef();
+//              ^^^^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:19:16: Context: Previous declaration of 'OldTypedef'.
+// typedef Object OldTypedef();
+//                ^^^^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
 // typedef Object OldTypedef();
@@ -153,6 +154,13 @@
 // typedef void OldTypedef();
 //              ^^^^^^^^^^
 //
+// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
+// var field = "3rd";
+//     ^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:23:5: Context: Previous declaration of 'field'.
+// var field = "2nd";
+//     ^^^^^
+//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:23:5: Error: 'field' is already declared in this scope.
 // var field = 4;
 //     ^^^^^
@@ -167,6 +175,13 @@
 // var field = 4;
 //     ^^^^^
 //
+// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
+// main() {
+// ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:29:1: Context: Previous declaration of 'main'.
+// main() {
+// ^^^^
+//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:31:1: Error: 'main' is already declared in this scope.
 // main() {
 // ^^^^
@@ -181,6 +196,63 @@
 // main() {
 // ^^^^
 //
+// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations.dart:70:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:81:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:7:1: Error: The part-of directive must be the only directive in a part.
+// Try removing the other directives, or moving them to the library for which this is a part.
+// import 'duplicated_declarations_lib.dart' as Typedef;
+// ^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:9:1: Error: The part-of directive must be the only directive in a part.
+// Try removing the other directives, or moving them to the library for which this is a part.
+// import 'duplicated_declarations_lib.dart' as Typedef;
+// ^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:15:1: Error: The part-of directive must be the only directive in a part.
+// Try removing the other directives, or moving them to the library for which this is a part.
+// import 'duplicated_declarations_lib.dart' as Typedef;
+// ^^^^^^
+//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:41:3: Error: 'C' is already declared in this scope.
 //   C(a, b);
 //   ^
@@ -209,20 +281,6 @@
 //   static s() {
 //          ^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Context: Previous declaration of 'C'.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Context: Previous declaration of 'C'.
-// class C {
-//       ^
-//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:74:3: Error: Name of enum constant 'Enum' can't be the same as the enum's own name.
 //   Enum,
 //   ^^^^
@@ -234,62 +292,6 @@
 //   a,
 //   ^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Context: Previous declaration of 'Enum'.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Context: Previous declaration of 'Enum'.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = void Function();
-//         ^^^^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:13:9: Context: Previous declaration of 'Typedef'.
-// typedef Typedef = Object Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
-// typedef void OldTypedef();
-//              ^^^^^^^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:19:16: Context: Previous declaration of 'OldTypedef'.
-// typedef Object OldTypedef();
-//                ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
-// var field = "3rd";
-//     ^^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:23:5: Context: Previous declaration of 'field'.
-// var field = "2nd";
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:29:1: Context: Previous declaration of 'main'.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-// pkg/front_end/testcases/duplicated_declarations.dart:70:7: Context: Previous declaration of 'C'.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:81:6: Context: Previous declaration of 'Enum'.
-// enum Enum {
-//      ^^^^
-//
 // pkg/front_end/testcases/duplicated_declarations.dart:7:46: Error: 'Typedef' is already declared in this scope.
 // import 'duplicated_declarations_lib.dart' as Typedef;
 //                                              ^^^^^^^
@@ -345,200 +347,7 @@
 // pkg/front_end/testcases/duplicated_declarations_part.dart:62:17: Error: Can't use 's' because it is declared more than once.
 //   static f() => s;
 //                 ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/duplicated_declarations.dart:7:1: Error: Import directives must preceed part directives.
-// Try moving the import directives before the part directives.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:9:1: Error: Import directives must preceed part directives.
-// Try moving the import directives before the part directives.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:13:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = Object Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:15:1: Error: Directives must appear before any declarations.
-// Try moving the directive before any declarations.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
-// typedef Object OldTypedef();
-//                ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:23:5: Error: 'field' is already declared in this scope.
-// var field = "2nd";
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:29:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:41:3: Error: 'C' is already declared in this scope.
-//   C(a, b);
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:44:7: Error: 'field' is already declared in this scope.
-//   var field = "2nd";
-//       ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:50:3: Error: 'm' is already declared in this scope.
-//   m() {
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:58:10: Error: 's' is already declared in this scope.
-//   static s() {
-//          ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:70:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:75:3: Error: Name of enum constant 'Enum' can't be the same as the enum's own name.
-//   Enum,
-//   ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:77:3: Error: 'a' is already declared in this scope.
-//   a,
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:81:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:91:3: Error: '_name' is already declared in this scope.
-//   _name,
-//   ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:92:3: Error: 'index' is already declared in this scope.
-//   index,
-//   ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:93:3: Error: 'toString' is already declared in this scope.
-//   toString,
-//   ^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:94:3: Error: 'values' is already declared in this scope.
-//   values,
-//   ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:7:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:9:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:13:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = Object Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:15:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
-// typedef Object OldTypedef();
-//                ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:23:5: Error: 'field' is already declared in this scope.
-// var field = 4;
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:25:5: Error: 'field' is already declared in this scope.
-// var field = 5.0;
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:31:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:35:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:41:3: Error: 'C' is already declared in this scope.
-//   C(a, b);
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:44:7: Error: 'field' is already declared in this scope.
-//   var field = "2nd";
-//       ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:50:3: Error: 'm' is already declared in this scope.
-//   m() {
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:58:10: Error: 's' is already declared in this scope.
-//   static s() {
-//          ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:74:3: Error: Name of enum constant 'Enum' can't be the same as the enum's own name.
-//   Enum,
-//   ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:76:3: Error: 'a' is already declared in this scope.
-//   a,
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = void Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
-// typedef void OldTypedef();
-//              ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
-// var field = "3rd";
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:7:46: Error: 'Typedef' is already declared in this scope.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-//                                              ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:65:19: Error: 'C' isn't a type.
-// class Sub extends C {
-//                   ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_declarations.dart.legacy.transformed.expect b/pkg/front_end/testcases/duplicated_declarations.dart.legacy.transformed.expect
index 50cee56..6b70b72 100644
--- a/pkg/front_end/testcases/duplicated_declarations.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/duplicated_declarations.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:7:1: Error: Import directives must preceed part directives.
 // Try moving the import directives before the part directives.
@@ -13,6 +15,9 @@
 // pkg/front_end/testcases/duplicated_declarations.dart:13:9: Error: 'Typedef' is already declared in this scope.
 // typedef Typedef = Object Function();
 //         ^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:11:9: Context: Previous declaration of 'Typedef'.
+// typedef Typedef = void Function();
+//         ^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:15:1: Error: Directives must appear before any declarations.
 // Try moving the directive before any declarations.
@@ -22,34 +27,58 @@
 // pkg/front_end/testcases/duplicated_declarations.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
 // typedef Object OldTypedef();
 //                ^^^^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:17:14: Context: Previous declaration of 'OldTypedef'.
+// typedef void OldTypedef();
+//              ^^^^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:23:5: Error: 'field' is already declared in this scope.
 // var field = "2nd";
 //     ^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:21:5: Context: Previous declaration of 'field'.
+// var field = "1st";
+//     ^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:29:1: Error: 'main' is already declared in this scope.
 // main() {
 // ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:25:1: Context: Previous declaration of 'main'.
+// main() {
+// ^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:41:3: Error: 'C' is already declared in this scope.
 //   C(a, b);
 //   ^
+// pkg/front_end/testcases/duplicated_declarations.dart:40:3: Context: Previous declaration of 'C'.
+//   C(a);
+//   ^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:44:7: Error: 'field' is already declared in this scope.
 //   var field = "2nd";
 //       ^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:42:7: Context: Previous declaration of 'field'.
+//   var field = "1st";
+//       ^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:50:3: Error: 'm' is already declared in this scope.
 //   m() {
 //   ^
+// pkg/front_end/testcases/duplicated_declarations.dart:46:3: Context: Previous declaration of 'm'.
+//   m() {
+//   ^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:58:10: Error: 's' is already declared in this scope.
 //   static s() {
 //          ^
+// pkg/front_end/testcases/duplicated_declarations.dart:54:10: Context: Previous declaration of 's'.
+//   static s() {
+//          ^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:70:7: Error: 'C' is already declared in this scope.
 // class C {
 //       ^
+// pkg/front_end/testcases/duplicated_declarations.dart:39:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:75:3: Error: Name of enum constant 'Enum' can't be the same as the enum's own name.
 //   Enum,
@@ -58,26 +87,156 @@
 // pkg/front_end/testcases/duplicated_declarations.dart:77:3: Error: 'a' is already declared in this scope.
 //   a,
 //   ^
+// pkg/front_end/testcases/duplicated_declarations.dart:76:3: Context: Previous declaration of 'a'.
+//   a,
+//   ^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:81:6: Error: 'Enum' is already declared in this scope.
 // enum Enum {
 //      ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:74:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:91:3: Error: '_name' is already declared in this scope.
 //   _name,
 //   ^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:87:6: Context: Previous declaration of '_name' is implied by this definition.
+// enum AnotherEnum {
+//      ^^^^^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:92:3: Error: 'index' is already declared in this scope.
 //   index,
 //   ^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:87:6: Context: Previous declaration of 'index' is implied by this definition.
+// enum AnotherEnum {
+//      ^^^^^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:93:3: Error: 'toString' is already declared in this scope.
 //   toString,
 //   ^^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:87:6: Context: Previous declaration of 'toString' is implied by this definition.
+// enum AnotherEnum {
+//      ^^^^^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:94:3: Error: 'values' is already declared in this scope.
 //   values,
 //   ^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:87:6: Context: Previous declaration of 'values' is implied by this definition.
+// enum AnotherEnum {
+//      ^^^^^^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
+// typedef Typedef = void Function();
+//         ^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:13:9: Context: Previous declaration of 'Typedef'.
+// typedef Typedef = Object Function();
+//         ^^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:13:9: Error: 'Typedef' is already declared in this scope.
+// typedef Typedef = Object Function();
+//         ^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Context: Previous declaration of 'Typedef'.
+// typedef Typedef = void Function();
+//         ^^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
+// typedef void OldTypedef();
+//              ^^^^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:19:16: Context: Previous declaration of 'OldTypedef'.
+// typedef Object OldTypedef();
+//                ^^^^^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
+// typedef Object OldTypedef();
+//                ^^^^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Context: Previous declaration of 'OldTypedef'.
+// typedef void OldTypedef();
+//              ^^^^^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
+// var field = "3rd";
+//     ^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:23:5: Context: Previous declaration of 'field'.
+// var field = "2nd";
+//     ^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:23:5: Error: 'field' is already declared in this scope.
+// var field = 4;
+//     ^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Context: Previous declaration of 'field'.
+// var field = "3rd";
+//     ^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:25:5: Error: 'field' is already declared in this scope.
+// var field = 5.0;
+//     ^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:23:5: Context: Previous declaration of 'field'.
+// var field = 4;
+//     ^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
+// main() {
+// ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:29:1: Context: Previous declaration of 'main'.
+// main() {
+// ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:31:1: Error: 'main' is already declared in this scope.
+// main() {
+// ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Context: Previous declaration of 'main'.
+// main() {
+// ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:35:1: Error: 'main' is already declared in this scope.
+// main() {
+// ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:31:1: Context: Previous declaration of 'main'.
+// main() {
+// ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations.dart:70:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:81:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:7:1: Error: The part-of directive must be the only directive in a part.
 // Try removing the other directives, or moving them to the library for which this is a part.
@@ -89,58 +248,38 @@
 // import 'duplicated_declarations_lib.dart' as Typedef;
 // ^^^^^^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:13:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = Object Function();
-//         ^^^^^^^
-//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:15:1: Error: The part-of directive must be the only directive in a part.
 // Try removing the other directives, or moving them to the library for which this is a part.
 // import 'duplicated_declarations_lib.dart' as Typedef;
 // ^^^^^^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
-// typedef Object OldTypedef();
-//                ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:23:5: Error: 'field' is already declared in this scope.
-// var field = 4;
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:25:5: Error: 'field' is already declared in this scope.
-// var field = 5.0;
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:31:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:35:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:41:3: Error: 'C' is already declared in this scope.
 //   C(a, b);
 //   ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:40:3: Context: Previous declaration of 'C'.
+//   C(a);
+//   ^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:44:7: Error: 'field' is already declared in this scope.
 //   var field = "2nd";
 //       ^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:42:7: Context: Previous declaration of 'field'.
+//   var field = "1st";
+//       ^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:50:3: Error: 'm' is already declared in this scope.
 //   m() {
 //   ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:46:3: Context: Previous declaration of 'm'.
+//   m() {
+//   ^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:58:10: Error: 's' is already declared in this scope.
 //   static s() {
 //          ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:54:10: Context: Previous declaration of 's'.
+//   static s() {
+//          ^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:74:3: Error: Name of enum constant 'Enum' can't be the same as the enum's own name.
 //   Enum,
@@ -149,48 +288,66 @@
 // pkg/front_end/testcases/duplicated_declarations_part.dart:76:3: Error: 'a' is already declared in this scope.
 //   a,
 //   ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = void Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
-// typedef void OldTypedef();
-//              ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
-// var field = "3rd";
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:75:3: Context: Previous declaration of 'a'.
+//   a,
+//   ^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:7:46: Error: 'Typedef' is already declared in this scope.
 // import 'duplicated_declarations_lib.dart' as Typedef;
 //                                              ^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:13:9: Context: Previous declaration of 'Typedef'.
+// typedef Typedef = Object Function();
+//         ^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:65:19: Error: 'C' isn't a type.
 // class Sub extends C {
 //                   ^
-
-library;
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:34:3: Error: Can't use 'main' because it is declared more than once.
+//   main();
+//   ^
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:35:9: Error: Can't use 'field' because it is declared more than once.
+//   print(field);
+//         ^
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:36:3: Error: Can't use 'C' because it is declared more than once.
+//   C.s();
+//   ^
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:62:17: Error: Can't use 's' because it is declared more than once.
+//   static f() => s;
+//                 ^
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:66:16: Warning: Too many positional arguments: 0 allowed, but 1 found.
+// Try removing the extra positional arguments.
+//   Sub() : super(null);
+//                ^
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:67:16: Warning: Superclass has no method named 'm'.
+//   m() => super.m();
+//                ^
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:102:38: Error: Can't use '_name' because it is declared more than once.
+//     "AnotherEnum._name": AnotherEnum._name,
+//                                      ^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:103:38: Error: Can't use 'index' because it is declared more than once.
+//     "AnotherEnum.index": AnotherEnum.index,
+//                                      ^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:104:41: Error: Can't use 'toString' because it is declared more than once.
+//     "AnotherEnum.toString": AnotherEnum.toString,
+//                                         ^^^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations.dart:105:39: Error: Can't use 'values' because it is declared more than once.
+//     "AnotherEnum.values": AnotherEnum.values,
+//                                       ^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:62:17: Error: Can't use 's' because it is declared more than once.
+//   static f() => s;
+//                 ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_declarations.dart.outline.expect b/pkg/front_end/testcases/duplicated_declarations.dart.outline.expect
index 4aebbb6..82639ee 100644
--- a/pkg/front_end/testcases/duplicated_declarations.dart.outline.expect
+++ b/pkg/front_end/testcases/duplicated_declarations.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:7:1: Error: Import directives must preceed part directives.
 // Try moving the import directives before the part directives.
@@ -124,15 +126,12 @@
 // enum AnotherEnum {
 //      ^^^^^^^^^^^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:7:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:9:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
+// typedef Typedef = void Function();
+//         ^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:13:9: Context: Previous declaration of 'Typedef'.
+// typedef Typedef = Object Function();
+//         ^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:13:9: Error: 'Typedef' is already declared in this scope.
 // typedef Typedef = Object Function();
@@ -141,10 +140,12 @@
 // typedef Typedef = void Function();
 //         ^^^^^^^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:15:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
+// typedef void OldTypedef();
+//              ^^^^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:19:16: Context: Previous declaration of 'OldTypedef'.
+// typedef Object OldTypedef();
+//                ^^^^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
 // typedef Object OldTypedef();
@@ -153,6 +154,13 @@
 // typedef void OldTypedef();
 //              ^^^^^^^^^^
 //
+// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
+// var field = "3rd";
+//     ^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:23:5: Context: Previous declaration of 'field'.
+// var field = "2nd";
+//     ^^^^^
+//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:23:5: Error: 'field' is already declared in this scope.
 // var field = 4;
 //     ^^^^^
@@ -167,6 +175,13 @@
 // var field = 4;
 //     ^^^^^
 //
+// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
+// main() {
+// ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:29:1: Context: Previous declaration of 'main'.
+// main() {
+// ^^^^
+//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:31:1: Error: 'main' is already declared in this scope.
 // main() {
 // ^^^^
@@ -181,6 +196,63 @@
 // main() {
 // ^^^^
 //
+// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations.dart:70:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:81:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:7:1: Error: The part-of directive must be the only directive in a part.
+// Try removing the other directives, or moving them to the library for which this is a part.
+// import 'duplicated_declarations_lib.dart' as Typedef;
+// ^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:9:1: Error: The part-of directive must be the only directive in a part.
+// Try removing the other directives, or moving them to the library for which this is a part.
+// import 'duplicated_declarations_lib.dart' as Typedef;
+// ^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:15:1: Error: The part-of directive must be the only directive in a part.
+// Try removing the other directives, or moving them to the library for which this is a part.
+// import 'duplicated_declarations_lib.dart' as Typedef;
+// ^^^^^^
+//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:41:3: Error: 'C' is already declared in this scope.
 //   C(a, b);
 //   ^
@@ -209,20 +281,6 @@
 //   static s() {
 //          ^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Context: Previous declaration of 'C'.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Context: Previous declaration of 'C'.
-// class C {
-//       ^
-//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:74:3: Error: Name of enum constant 'Enum' can't be the same as the enum's own name.
 //   Enum,
 //   ^^^^
@@ -234,62 +292,6 @@
 //   a,
 //   ^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Context: Previous declaration of 'Enum'.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Context: Previous declaration of 'Enum'.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = void Function();
-//         ^^^^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:13:9: Context: Previous declaration of 'Typedef'.
-// typedef Typedef = Object Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
-// typedef void OldTypedef();
-//              ^^^^^^^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:19:16: Context: Previous declaration of 'OldTypedef'.
-// typedef Object OldTypedef();
-//                ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
-// var field = "3rd";
-//     ^^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:23:5: Context: Previous declaration of 'field'.
-// var field = "2nd";
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:29:1: Context: Previous declaration of 'main'.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-// pkg/front_end/testcases/duplicated_declarations.dart:70:7: Context: Previous declaration of 'C'.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:81:6: Context: Previous declaration of 'Enum'.
-// enum Enum {
-//      ^^^^
-//
 // pkg/front_end/testcases/duplicated_declarations.dart:7:46: Error: 'Typedef' is already declared in this scope.
 // import 'duplicated_declarations_lib.dart' as Typedef;
 //                                              ^^^^^^^
@@ -300,8 +302,7 @@
 // pkg/front_end/testcases/duplicated_declarations.dart:65:19: Error: 'C' isn't a type.
 // class Sub extends C {
 //                   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_declarations.dart.strong.expect b/pkg/front_end/testcases/duplicated_declarations.dart.strong.expect
index 99a1f04..98e2cc1 100644
--- a/pkg/front_end/testcases/duplicated_declarations.dart.strong.expect
+++ b/pkg/front_end/testcases/duplicated_declarations.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_declarations.dart:7:1: Error: Import directives must preceed part directives.
 // Try moving the import directives before the part directives.
@@ -124,15 +126,12 @@
 // enum AnotherEnum {
 //      ^^^^^^^^^^^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:7:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:9:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
+// typedef Typedef = void Function();
+//         ^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:13:9: Context: Previous declaration of 'Typedef'.
+// typedef Typedef = Object Function();
+//         ^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:13:9: Error: 'Typedef' is already declared in this scope.
 // typedef Typedef = Object Function();
@@ -141,10 +140,12 @@
 // typedef Typedef = void Function();
 //         ^^^^^^^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:15:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
+// typedef void OldTypedef();
+//              ^^^^^^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:19:16: Context: Previous declaration of 'OldTypedef'.
+// typedef Object OldTypedef();
+//                ^^^^^^^^^^
 //
 // pkg/front_end/testcases/duplicated_declarations_part.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
 // typedef Object OldTypedef();
@@ -153,6 +154,13 @@
 // typedef void OldTypedef();
 //              ^^^^^^^^^^
 //
+// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
+// var field = "3rd";
+//     ^^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:23:5: Context: Previous declaration of 'field'.
+// var field = "2nd";
+//     ^^^^^
+//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:23:5: Error: 'field' is already declared in this scope.
 // var field = 4;
 //     ^^^^^
@@ -167,6 +175,13 @@
 // var field = 4;
 //     ^^^^^
 //
+// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
+// main() {
+// ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:29:1: Context: Previous declaration of 'main'.
+// main() {
+// ^^^^
+//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:31:1: Error: 'main' is already declared in this scope.
 // main() {
 // ^^^^
@@ -181,6 +196,63 @@
 // main() {
 // ^^^^
 //
+// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations.dart:70:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
+// class C {
+//       ^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Context: Previous declaration of 'C'.
+// class C {
+//       ^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations.dart:81:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
+// enum Enum {
+//      ^^^^
+// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Context: Previous declaration of 'Enum'.
+// enum Enum {
+//      ^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:7:1: Error: The part-of directive must be the only directive in a part.
+// Try removing the other directives, or moving them to the library for which this is a part.
+// import 'duplicated_declarations_lib.dart' as Typedef;
+// ^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:9:1: Error: The part-of directive must be the only directive in a part.
+// Try removing the other directives, or moving them to the library for which this is a part.
+// import 'duplicated_declarations_lib.dart' as Typedef;
+// ^^^^^^
+//
+// pkg/front_end/testcases/duplicated_declarations_part.dart:15:1: Error: The part-of directive must be the only directive in a part.
+// Try removing the other directives, or moving them to the library for which this is a part.
+// import 'duplicated_declarations_lib.dart' as Typedef;
+// ^^^^^^
+//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:41:3: Error: 'C' is already declared in this scope.
 //   C(a, b);
 //   ^
@@ -209,20 +281,6 @@
 //   static s() {
 //          ^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Context: Previous declaration of 'C'.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Context: Previous declaration of 'C'.
-// class C {
-//       ^
-//
 // pkg/front_end/testcases/duplicated_declarations_part.dart:74:3: Error: Name of enum constant 'Enum' can't be the same as the enum's own name.
 //   Enum,
 //   ^^^^
@@ -234,62 +292,6 @@
 //   a,
 //   ^
 //
-// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Context: Previous declaration of 'Enum'.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Context: Previous declaration of 'Enum'.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = void Function();
-//         ^^^^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:13:9: Context: Previous declaration of 'Typedef'.
-// typedef Typedef = Object Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
-// typedef void OldTypedef();
-//              ^^^^^^^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:19:16: Context: Previous declaration of 'OldTypedef'.
-// typedef Object OldTypedef();
-//                ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
-// var field = "3rd";
-//     ^^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:23:5: Context: Previous declaration of 'field'.
-// var field = "2nd";
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:29:1: Context: Previous declaration of 'main'.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-// pkg/front_end/testcases/duplicated_declarations.dart:70:7: Context: Previous declaration of 'C'.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-// pkg/front_end/testcases/duplicated_declarations.dart:81:6: Context: Previous declaration of 'Enum'.
-// enum Enum {
-//      ^^^^
-//
 // pkg/front_end/testcases/duplicated_declarations.dart:7:46: Error: 'Typedef' is already declared in this scope.
 // import 'duplicated_declarations_lib.dart' as Typedef;
 //                                              ^^^^^^^
@@ -345,204 +347,7 @@
 // pkg/front_end/testcases/duplicated_declarations_part.dart:62:17: Error: Can't use 's' because it is declared more than once.
 //   static f() => s;
 //                 ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/duplicated_declarations.dart:7:1: Error: Import directives must preceed part directives.
-// Try moving the import directives before the part directives.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:9:1: Error: Import directives must preceed part directives.
-// Try moving the import directives before the part directives.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:13:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = Object Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:15:1: Error: Directives must appear before any declarations.
-// Try moving the directive before any declarations.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
-// typedef Object OldTypedef();
-//                ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:23:5: Error: 'field' is already declared in this scope.
-// var field = "2nd";
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:29:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:41:3: Error: 'C' is already declared in this scope.
-//   C(a, b);
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:44:7: Error: 'field' is already declared in this scope.
-//   var field = "2nd";
-//       ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:50:3: Error: 'm' is already declared in this scope.
-//   m() {
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:58:10: Error: 's' is already declared in this scope.
-//   static s() {
-//          ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:70:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:75:3: Error: Name of enum constant 'Enum' can't be the same as the enum's own name.
-//   Enum,
-//   ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:77:3: Error: 'a' is already declared in this scope.
-//   a,
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:81:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:91:3: Error: '_name' is already declared in this scope.
-//   _name,
-//   ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:92:3: Error: 'index' is already declared in this scope.
-//   index,
-//   ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:93:3: Error: 'toString' is already declared in this scope.
-//   toString,
-//   ^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:94:3: Error: 'values' is already declared in this scope.
-//   values,
-//   ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:7:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:9:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:13:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = Object Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:15:1: Error: The part-of directive must be the only directive in a part.
-// Try removing the other directives, or moving them to the library for which this is a part.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-// ^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:19:16: Error: 'OldTypedef' is already declared in this scope.
-// typedef Object OldTypedef();
-//                ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:23:5: Error: 'field' is already declared in this scope.
-// var field = 4;
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:25:5: Error: 'field' is already declared in this scope.
-// var field = 5.0;
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:31:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:35:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:41:3: Error: 'C' is already declared in this scope.
-//   C(a, b);
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:44:7: Error: 'field' is already declared in this scope.
-//   var field = "2nd";
-//       ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:50:3: Error: 'm' is already declared in this scope.
-//   m() {
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:58:10: Error: 's' is already declared in this scope.
-//   static s() {
-//          ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:65:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:69:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:74:3: Error: Name of enum constant 'Enum' can't be the same as the enum's own name.
-//   Enum,
-//   ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:76:3: Error: 'a' is already declared in this scope.
-//   a,
-//   ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:80:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:86:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:11:9: Error: 'Typedef' is already declared in this scope.
-// typedef Typedef = void Function();
-//         ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:17:14: Error: 'OldTypedef' is already declared in this scope.
-// typedef void OldTypedef();
-//              ^^^^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:21:5: Error: 'field' is already declared in this scope.
-// var field = "3rd";
-//     ^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:27:1: Error: 'main' is already declared in this scope.
-// main() {
-// ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:39:7: Error: 'C' is already declared in this scope.
-// class C {
-//       ^
-//
-// pkg/front_end/testcases/duplicated_declarations_part.dart:73:6: Error: 'Enum' is already declared in this scope.
-// enum Enum {
-//      ^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:7:46: Error: 'Typedef' is already declared in this scope.
-// import 'duplicated_declarations_lib.dart' as Typedef;
-//                                              ^^^^^^^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:65:19: Error: 'C' isn't a type.
-// class Sub extends C {
-//                   ^
-//
-// pkg/front_end/testcases/duplicated_declarations.dart:67:16: Error: Superclass has no method named 'm'.
-//   m() => super.m();
-//                ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_field_initializer.dart.legacy.expect b/pkg/front_end/testcases/duplicated_field_initializer.dart.legacy.expect
index a61a36d..9be85c0 100644
--- a/pkg/front_end/testcases/duplicated_field_initializer.dart.legacy.expect
+++ b/pkg/front_end/testcases/duplicated_field_initializer.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_field_initializer.dart:7:7: Error: 'a' is already declared in this scope.
 //   int a;
@@ -10,14 +12,7 @@
 // pkg/front_end/testcases/duplicated_field_initializer.dart:8:10: Error: Can't use 'a' because it is declared more than once.
 //   A(this.a);
 //          ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/duplicated_field_initializer.dart:7:7: Error: 'a' is already declared in this scope.
-//   int a;
-//       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_field_initializer.dart.legacy.transformed.expect b/pkg/front_end/testcases/duplicated_field_initializer.dart.legacy.transformed.expect
index 97c35dc..9be85c0 100644
--- a/pkg/front_end/testcases/duplicated_field_initializer.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/duplicated_field_initializer.dart.legacy.transformed.expect
@@ -1,10 +1,18 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_field_initializer.dart:7:7: Error: 'a' is already declared in this scope.
 //   int a;
 //       ^
-
-library;
+// pkg/front_end/testcases/duplicated_field_initializer.dart:6:7: Context: Previous declaration of 'a'.
+//   int a;
+//       ^
+//
+// pkg/front_end/testcases/duplicated_field_initializer.dart:8:10: Error: Can't use 'a' because it is declared more than once.
+//   A(this.a);
+//          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_field_initializer.dart.outline.expect b/pkg/front_end/testcases/duplicated_field_initializer.dart.outline.expect
index 230dc5e..dd9b512 100644
--- a/pkg/front_end/testcases/duplicated_field_initializer.dart.outline.expect
+++ b/pkg/front_end/testcases/duplicated_field_initializer.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_field_initializer.dart:7:7: Error: 'a' is already declared in this scope.
 //   int a;
@@ -6,8 +8,7 @@
 // pkg/front_end/testcases/duplicated_field_initializer.dart:6:7: Context: Previous declaration of 'a'.
 //   int a;
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_field_initializer.dart.strong.expect b/pkg/front_end/testcases/duplicated_field_initializer.dart.strong.expect
index 2c39c5e..f272e6c 100644
--- a/pkg/front_end/testcases/duplicated_field_initializer.dart.strong.expect
+++ b/pkg/front_end/testcases/duplicated_field_initializer.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_field_initializer.dart:7:7: Error: 'a' is already declared in this scope.
 //   int a;
@@ -10,14 +12,7 @@
 // pkg/front_end/testcases/duplicated_field_initializer.dart:8:10: Error: Can't use 'a' because it is declared more than once.
 //   A(this.a);
 //          ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/duplicated_field_initializer.dart:7:7: Error: 'a' is already declared in this scope.
-//   int a;
-//       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_field_initializer.dart.strong.transformed.expect b/pkg/front_end/testcases/duplicated_field_initializer.dart.strong.transformed.expect
index b3fa279..f272e6c 100644
--- a/pkg/front_end/testcases/duplicated_field_initializer.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/duplicated_field_initializer.dart.strong.transformed.expect
@@ -1,10 +1,18 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_field_initializer.dart:7:7: Error: 'a' is already declared in this scope.
 //   int a;
 //       ^
-
-library;
+// pkg/front_end/testcases/duplicated_field_initializer.dart:6:7: Context: Previous declaration of 'a'.
+//   int a;
+//       ^
+//
+// pkg/front_end/testcases/duplicated_field_initializer.dart:8:10: Error: Can't use 'a' because it is declared more than once.
+//   A(this.a);
+//          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_named_args_3.dart.strong.expect b/pkg/front_end/testcases/duplicated_named_args_3.dart.strong.expect
index 6ff96e9..42c312a 100644
--- a/pkg/front_end/testcases/duplicated_named_args_3.dart.strong.expect
+++ b/pkg/front_end/testcases/duplicated_named_args_3.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/duplicated_named_args_3.dart:13:13: Error: Duplicated named argument 'a'.
 //   C.m(a: 1, a: 2, a: 3);
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/duplicated_named_args_3.dart:13:19: Error: Duplicated named argument 'a'.
 //   C.m(a: 1, a: 2, a: 3);
 //                   ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/duplicated_named_args_3.dart.strong.transformed.expect b/pkg/front_end/testcases/duplicated_named_args_3.dart.strong.transformed.expect
index e65bd84..42c312a 100644
--- a/pkg/front_end/testcases/duplicated_named_args_3.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/duplicated_named_args_3.dart.strong.transformed.expect
@@ -1,4 +1,15 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/duplicated_named_args_3.dart:13:13: Error: Duplicated named argument 'a'.
+//   C.m(a: 1, a: 2, a: 3);
+//             ^
+//
+// pkg/front_end/testcases/duplicated_named_args_3.dart:13:19: Error: Duplicated named argument 'a'.
+//   C.m(a: 1, a: 2, a: 3);
+//                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/dynamic_and_void.dart.legacy.expect b/pkg/front_end/testcases/dynamic_and_void.dart.legacy.expect
index 81f6e95..9039990 100644
--- a/pkg/front_end/testcases/dynamic_and_void.dart.legacy.expect
+++ b/pkg/front_end/testcases/dynamic_and_void.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/dynamic_and_void.dart:12:27: Warning: Type 'dynamic' not found.
 // /*@warning=TypeNotFound*/ dynamic testDynamic() => 0;
 //                           ^^^^^^^
-
-library;
+//
 import self as self;
 
 static method testDynamic() → invalid-type
diff --git a/pkg/front_end/testcases/dynamic_and_void.dart.legacy.transformed.expect b/pkg/front_end/testcases/dynamic_and_void.dart.legacy.transformed.expect
index 4b7b5f6..9039990 100644
--- a/pkg/front_end/testcases/dynamic_and_void.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/dynamic_and_void.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/dynamic_and_void.dart:12:27: Warning: Type 'dynamic' not found.
+// /*@warning=TypeNotFound*/ dynamic testDynamic() => 0;
+//                           ^^^^^^^
+//
 import self as self;
 
 static method testDynamic() → invalid-type
diff --git a/pkg/front_end/testcases/dynamic_and_void.dart.outline.expect b/pkg/front_end/testcases/dynamic_and_void.dart.outline.expect
index 593529d..c589a50 100644
--- a/pkg/front_end/testcases/dynamic_and_void.dart.outline.expect
+++ b/pkg/front_end/testcases/dynamic_and_void.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/dynamic_and_void.dart:12:27: Warning: Type 'dynamic' not found.
 // /*@warning=TypeNotFound*/ dynamic testDynamic() => 0;
 //                           ^^^^^^^
-
-library;
+//
 import self as self;
 
 static method testDynamic() → invalid-type
diff --git a/pkg/front_end/testcases/expressions.dart.legacy.expect b/pkg/front_end/testcases/expressions.dart.legacy.expect
index 158f1ec..5676a4d 100644
--- a/pkg/front_end/testcases/expressions.dart.legacy.expect
+++ b/pkg/front_end/testcases/expressions.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/expressions.dart:74:16: Warning: Method not found: 'int.toString'.
 //     print(int?.toString());
 //                ^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/expressions.dart.legacy.transformed.expect b/pkg/front_end/testcases/expressions.dart.legacy.transformed.expect
index 04022a3..5a549bb 100644
--- a/pkg/front_end/testcases/expressions.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/expressions.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/expressions.dart:74:16: Warning: Method not found: 'int.toString'.
+//     print(int?.toString());
+//                ^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/expressions.dart.strong.expect b/pkg/front_end/testcases/expressions.dart.strong.expect
index 4b86fde..2a658a7 100644
--- a/pkg/front_end/testcases/expressions.dart.strong.expect
+++ b/pkg/front_end/testcases/expressions.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/expressions.dart:74:16: Error: Method not found: 'int.toString'.
 //     print(int?.toString());
 //                ^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/expressions.dart.strong.transformed.expect b/pkg/front_end/testcases/expressions.dart.strong.transformed.expect
index 65212a2..2732cf4 100644
--- a/pkg/front_end/testcases/expressions.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/expressions.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/expressions.dart:74:16: Error: Method not found: 'int.toString'.
+//     print(int?.toString());
+//                ^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/for_in_without_declaration.dart.legacy.expect b/pkg/front_end/testcases/for_in_without_declaration.dart.legacy.expect
index 2aab6ce..3f38f4c 100644
--- a/pkg/front_end/testcases/for_in_without_declaration.dart.legacy.expect
+++ b/pkg/front_end/testcases/for_in_without_declaration.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/for_in_without_declaration.dart:32:10: Error: Expected an identifier, but got 'super'.
 //     for (super.superInstanceField in []) {}
@@ -47,42 +49,7 @@
 // pkg/front_end/testcases/for_in_without_declaration.dart:41:10: Error: A for-in loop can't have more than one loop variable.
 //     for (var x, y in <int>[]) {
 //          ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/for_in_without_declaration.dart:32:10: Error: Expected an identifier, but got 'super'.
-//     for (super.superInstanceField in []) {}
-//          ^^^^^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:33:10: Error: Expected an identifier, but got 'super'.
-//     for (super.untypedSuperInstanceField in []) {}
-//          ^^^^^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:35:11: Error: Unexpected token '.'.
-//     for (c.instanceField in []) {}
-//           ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:36:11: Error: Unexpected token '.'.
-//     for (c.untypedSuperInstanceField in []) {}
-//           ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:38:20: Error: Unexpected token '.'.
-//     for (unresolved.foo in []) {}
-//                    ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:39:11: Error: Unexpected token '.'.
-//     for (c.unresolved in []) {}
-//           ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:40:14: Error: Unexpected token '('.
-//     for (main() in []) {}
-//              ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:41:15: Error: Unexpected token ','.
-//     for (var x, y in <int>[]) {
-//               ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/for_in_without_declaration.dart.legacy.transformed.expect b/pkg/front_end/testcases/for_in_without_declaration.dart.legacy.transformed.expect
index 88f2996..3f38f4c 100644
--- a/pkg/front_end/testcases/for_in_without_declaration.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/for_in_without_declaration.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/for_in_without_declaration.dart:32:10: Error: Expected an identifier, but got 'super'.
 //     for (super.superInstanceField in []) {}
@@ -16,6 +18,14 @@
 //     for (c.untypedSuperInstanceField in []) {}
 //           ^
 //
+// pkg/front_end/testcases/for_in_without_declaration.dart:37:10: Warning: Setter not found: 'unresolved'.
+//     for (unresolved in []) {}
+//          ^^^^^^^^^^
+//
+// pkg/front_end/testcases/for_in_without_declaration.dart:38:10: Warning: Getter not found: 'unresolved'.
+//     for (unresolved.foo in []) {}
+//          ^^^^^^^^^^
+//
 // pkg/front_end/testcases/for_in_without_declaration.dart:38:20: Error: Unexpected token '.'.
 //     for (unresolved.foo in []) {}
 //                    ^
@@ -28,11 +38,18 @@
 //     for (main() in []) {}
 //              ^
 //
+// pkg/front_end/testcases/for_in_without_declaration.dart:40:10: Error: Can't assign to this, so it can't be used in a for-in loop.
+//     for (main() in []) {}
+//          ^^^^
+//
 // pkg/front_end/testcases/for_in_without_declaration.dart:41:15: Error: Unexpected token ','.
 //     for (var x, y in <int>[]) {
 //               ^
-
-library;
+//
+// pkg/front_end/testcases/for_in_without_declaration.dart:41:10: Error: A for-in loop can't have more than one loop variable.
+//     for (var x, y in <int>[]) {
+//          ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/for_in_without_declaration.dart.strong.expect b/pkg/front_end/testcases/for_in_without_declaration.dart.strong.expect
index e672743..85d9a51 100644
--- a/pkg/front_end/testcases/for_in_without_declaration.dart.strong.expect
+++ b/pkg/front_end/testcases/for_in_without_declaration.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/for_in_without_declaration.dart:32:10: Error: Expected an identifier, but got 'super'.
 //     for (super.superInstanceField in []) {}
@@ -65,50 +67,7 @@
 // Try correcting the name to the name of an existing setter, or defining a setter or field named 'unresolved'.
 //     for (c.unresolved in []) {}
 //            ^^^^^^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/for_in_without_declaration.dart:32:10: Error: Expected an identifier, but got 'super'.
-//     for (super.superInstanceField in []) {}
-//          ^^^^^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:33:10: Error: Expected an identifier, but got 'super'.
-//     for (super.untypedSuperInstanceField in []) {}
-//          ^^^^^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:35:11: Error: Unexpected token '.'.
-//     for (c.instanceField in []) {}
-//           ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:36:11: Error: Unexpected token '.'.
-//     for (c.untypedSuperInstanceField in []) {}
-//           ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:37:10: Error: Setter not found: 'unresolved'.
-//     for (unresolved in []) {}
-//          ^^^^^^^^^^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:38:10: Error: Getter not found: 'unresolved'.
-//     for (unresolved.foo in []) {}
-//          ^^^^^^^^^^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:38:20: Error: Unexpected token '.'.
-//     for (unresolved.foo in []) {}
-//                    ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:39:11: Error: Unexpected token '.'.
-//     for (c.unresolved in []) {}
-//           ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:40:14: Error: Unexpected token '('.
-//     for (main() in []) {}
-//              ^
-//
-// pkg/front_end/testcases/for_in_without_declaration.dart:41:15: Error: Unexpected token ','.
-//     for (var x, y in <int>[]) {
-//               ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/function_type_assignments.dart.strong.expect b/pkg/front_end/testcases/function_type_assignments.dart.strong.expect
index a7d04c0..47dadba 100644
--- a/pkg/front_end/testcases/function_type_assignments.dart.strong.expect
+++ b/pkg/front_end/testcases/function_type_assignments.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/function_type_assignments.dart:11:12: Error: A value of type 'T Function<T>(T)' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
@@ -16,8 +18,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 // String z = identityList; // List<T> bound
 //            ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/function_type_assignments.dart.strong.transformed.expect b/pkg/front_end/testcases/function_type_assignments.dart.strong.transformed.expect
index f945f65..47dadba 100644
--- a/pkg/front_end/testcases/function_type_assignments.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/function_type_assignments.dart.strong.transformed.expect
@@ -1,4 +1,24 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/function_type_assignments.dart:11:12: Error: A value of type 'T Function<T>(T)' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+// String x = identity; // No bound
+//            ^
+//
+// pkg/front_end/testcases/function_type_assignments.dart:12:12: Error: A value of type 'T Function<T extends Object>(T)' can't be assigned to a variable of type 'String'.
+//  - 'Object' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+// String y = identityObject; // Object bound
+//            ^
+//
+// pkg/front_end/testcases/function_type_assignments.dart:13:12: Error: A value of type 'T Function<T extends List<T>>(T)' can't be assigned to a variable of type 'String'.
+//  - 'List' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+// String z = identityList; // List<T> bound
+//            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/function_type_default_value.dart.legacy.expect b/pkg/front_end/testcases/function_type_default_value.dart.legacy.expect
index ba53ef3..17bf98f 100644
--- a/pkg/front_end/testcases/function_type_default_value.dart.legacy.expect
+++ b/pkg/front_end/testcases/function_type_default_value.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Expected an identifier, but got ':'.
 // void Function({obj: Object}) x;
@@ -11,18 +13,7 @@
 // pkg/front_end/testcases/function_type_default_value.dart:5:16: Warning: 'obj' isn't a type.
 // void Function({obj: Object}) x;
 //                ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Expected an identifier, but got ':'.
-// void Function({obj: Object}) x;
-//                   ^
-//
-// pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Can't have a default value in a function type.
-// void Function({obj: Object}) x;
-//                   ^
-
-library;
 import self as self;
 
 static field () → void x;
diff --git a/pkg/front_end/testcases/function_type_default_value.dart.legacy.transformed.expect b/pkg/front_end/testcases/function_type_default_value.dart.legacy.transformed.expect
index 1e5f712..17bf98f 100644
--- a/pkg/front_end/testcases/function_type_default_value.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/function_type_default_value.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Expected an identifier, but got ':'.
 // void Function({obj: Object}) x;
@@ -7,8 +9,11 @@
 // pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Can't have a default value in a function type.
 // void Function({obj: Object}) x;
 //                   ^
-
-library;
+//
+// pkg/front_end/testcases/function_type_default_value.dart:5:16: Warning: 'obj' isn't a type.
+// void Function({obj: Object}) x;
+//                ^^^
+//
 import self as self;
 
 static field () → void x;
diff --git a/pkg/front_end/testcases/function_type_default_value.dart.outline.expect b/pkg/front_end/testcases/function_type_default_value.dart.outline.expect
index 8512a58..ce8fac7 100644
--- a/pkg/front_end/testcases/function_type_default_value.dart.outline.expect
+++ b/pkg/front_end/testcases/function_type_default_value.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Expected an identifier, but got ':'.
 // void Function({obj: Object}) x;
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Can't have a default value in a function type.
 // void Function({obj: Object}) x;
 //                   ^
-
-library;
+//
 import self as self;
 
 static field () → void x;
diff --git a/pkg/front_end/testcases/function_type_default_value.dart.strong.expect b/pkg/front_end/testcases/function_type_default_value.dart.strong.expect
index 1d5c09e..dd48e08 100644
--- a/pkg/front_end/testcases/function_type_default_value.dart.strong.expect
+++ b/pkg/front_end/testcases/function_type_default_value.dart.strong.expect
@@ -1,32 +1,19 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Expected an identifier, but got ':'.
-// void Function({obj: Object}) x;
-//                   ^
-//
-// pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Can't have a default value in a function type.
-// void Function({obj: Object}) x;
-//                   ^
-//
-// pkg/front_end/testcases/function_type_default_value.dart:5:16: Error: 'obj' isn't a type.
-// void Function({obj: Object}) x;
-//                ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Expected an identifier, but got ':'.
-// void Function({obj: Object}) x;
-//                   ^
-//
-// pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Can't have a default value in a function type.
-// void Function({obj: Object}) x;
-//                   ^
-//
-// pkg/front_end/testcases/function_type_default_value.dart:5:16: Error: 'obj' isn't a type.
-// void Function({obj: Object}) x;
-//                ^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Expected an identifier, but got ':'.
+// void Function({obj: Object}) x;
+//                   ^
+//
+// pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Can't have a default value in a function type.
+// void Function({obj: Object}) x;
+//                   ^
+//
+// pkg/front_end/testcases/function_type_default_value.dart:5:16: Error: 'obj' isn't a type.
+// void Function({obj: Object}) x;
+//                ^^^
+//
 import self as self;
 
 static field () → void x;
diff --git a/pkg/front_end/testcases/function_type_default_value.dart.strong.transformed.expect b/pkg/front_end/testcases/function_type_default_value.dart.strong.transformed.expect
index de199db..dd48e08 100644
--- a/pkg/front_end/testcases/function_type_default_value.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/function_type_default_value.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/function_type_default_value.dart:5:19: Error: Expected an identifier, but got ':'.
 // void Function({obj: Object}) x;
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/function_type_default_value.dart:5:16: Error: 'obj' isn't a type.
 // void Function({obj: Object}) x;
 //                ^^^
-
-library;
+//
 import self as self;
 
 static field () → void x;
diff --git a/pkg/front_end/testcases/function_type_recovery.dart.outline.expect b/pkg/front_end/testcases/function_type_recovery.dart.outline.expect
index 244b4eb..ec474f1 100644
--- a/pkg/front_end/testcases/function_type_recovery.dart.outline.expect
+++ b/pkg/front_end/testcases/function_type_recovery.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/function_type_recovery.dart:8:31: Error: Inline function types cannot be used for parameters in a generic function type.
 // Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').
 // typedef F = int Function(int f(String x));
 //                               ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/function_type_recovery.dart.strong.expect b/pkg/front_end/testcases/function_type_recovery.dart.strong.expect
index ff7a407..4d646a1 100644
--- a/pkg/front_end/testcases/function_type_recovery.dart.strong.expect
+++ b/pkg/front_end/testcases/function_type_recovery.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/function_type_recovery.dart:8:31: Error: Inline function types cannot be used for parameters in a generic function type.
-// Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').
-// typedef F = int Function(int f(String x));
-//                               ^
-//
-// pkg/front_end/testcases/function_type_recovery.dart:12:27: Error: Inline function types cannot be used for parameters in a generic function type.
-// Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').
-//   String Function(String g(int y)) g = null;
-//                           ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/function_type_recovery.dart:8:31: Error: Inline function types cannot be used for parameters in a generic function type.
-// Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').
-// typedef F = int Function(int f(String x));
-//                               ^
-//
-// pkg/front_end/testcases/function_type_recovery.dart:12:27: Error: Inline function types cannot be used for parameters in a generic function type.
-// Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').
-//   String Function(String g(int y)) g = null;
-//                           ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/function_type_recovery.dart:8:31: Error: Inline function types cannot be used for parameters in a generic function type.
+// Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').
+// typedef F = int Function(int f(String x));
+//                               ^
+//
+// pkg/front_end/testcases/function_type_recovery.dart:12:27: Error: Inline function types cannot be used for parameters in a generic function type.
+// Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').
+//   String Function(String g(int y)) g = null;
+//                           ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/function_type_recovery.dart.strong.transformed.expect b/pkg/front_end/testcases/function_type_recovery.dart.strong.transformed.expect
index cc3bac0..4d646a1 100644
--- a/pkg/front_end/testcases/function_type_recovery.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/function_type_recovery.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/function_type_recovery.dart:8:31: Error: Inline function types cannot be used for parameters in a generic function type.
 // Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').
@@ -9,8 +11,7 @@
 // Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').
 //   String Function(String g(int y)) g = null;
 //                           ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/illegal_named_function_expression.dart.legacy.expect b/pkg/front_end/testcases/illegal_named_function_expression.dart.legacy.expect
index 79cb600..725841d 100644
--- a/pkg/front_end/testcases/illegal_named_function_expression.dart.legacy.expect
+++ b/pkg/front_end/testcases/illegal_named_function_expression.dart.legacy.expect
@@ -1,24 +1,15 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/illegal_named_function_expression.dart:6:16: Error: A function expression can't have a name.
-//   var x = void f<T>(T t) {};
-//                ^
-//
-// pkg/front_end/testcases/illegal_named_function_expression.dart:8:14: Error: A function expression can't have a name.
-//   print(void g<T>(T t) {});
-//              ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/illegal_named_function_expression.dart:6:16: Error: A function expression can't have a name.
-//   var x = void f<T>(T t) {};
-//                ^
-//
-// pkg/front_end/testcases/illegal_named_function_expression.dart:8:14: Error: A function expression can't have a name.
-//   print(void g<T>(T t) {});
-//              ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/illegal_named_function_expression.dart:6:16: Error: A function expression can't have a name.
+//   var x = void f<T>(T t) {};
+//                ^
+//
+// pkg/front_end/testcases/illegal_named_function_expression.dart:8:14: Error: A function expression can't have a name.
+//   print(void g<T>(T t) {});
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/illegal_named_function_expression.dart.legacy.transformed.expect b/pkg/front_end/testcases/illegal_named_function_expression.dart.legacy.transformed.expect
index 9627a6e8..725841d 100644
--- a/pkg/front_end/testcases/illegal_named_function_expression.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/illegal_named_function_expression.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/illegal_named_function_expression.dart:6:16: Error: A function expression can't have a name.
 //   var x = void f<T>(T t) {};
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/illegal_named_function_expression.dart:8:14: Error: A function expression can't have a name.
 //   print(void g<T>(T t) {});
 //              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/illegal_named_function_expression.dart.strong.expect b/pkg/front_end/testcases/illegal_named_function_expression.dart.strong.expect
index 0fbf026..0be54a8 100644
--- a/pkg/front_end/testcases/illegal_named_function_expression.dart.strong.expect
+++ b/pkg/front_end/testcases/illegal_named_function_expression.dart.strong.expect
@@ -1,24 +1,15 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/illegal_named_function_expression.dart:6:16: Error: A function expression can't have a name.
-//   var x = void f<T>(T t) {};
-//                ^
-//
-// pkg/front_end/testcases/illegal_named_function_expression.dart:8:14: Error: A function expression can't have a name.
-//   print(void g<T>(T t) {});
-//              ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/illegal_named_function_expression.dart:6:16: Error: A function expression can't have a name.
-//   var x = void f<T>(T t) {};
-//                ^
-//
-// pkg/front_end/testcases/illegal_named_function_expression.dart:8:14: Error: A function expression can't have a name.
-//   print(void g<T>(T t) {});
-//              ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/illegal_named_function_expression.dart:6:16: Error: A function expression can't have a name.
+//   var x = void f<T>(T t) {};
+//                ^
+//
+// pkg/front_end/testcases/illegal_named_function_expression.dart:8:14: Error: A function expression can't have a name.
+//   print(void g<T>(T t) {});
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/illegal_named_function_expression.dart.strong.transformed.expect b/pkg/front_end/testcases/illegal_named_function_expression.dart.strong.transformed.expect
index 0f485bc..0be54a8 100644
--- a/pkg/front_end/testcases/illegal_named_function_expression.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/illegal_named_function_expression.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/illegal_named_function_expression.dart:6:16: Error: A function expression can't have a name.
 //   var x = void f<T>(T t) {};
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/illegal_named_function_expression.dart:8:14: Error: A function expression can't have a name.
 //   print(void g<T>(T t) {});
 //              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.legacy.expect b/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.legacy.expect
index a8247f6..8469fb4 100644
--- a/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.legacy.expect
+++ b/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/illegal_named_function_expression_scope.dart:7:14: Error: A function expression can't have a name.
-//   print(void f() {});
-//              ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/illegal_named_function_expression_scope.dart:7:14: Error: A function expression can't have a name.
-//   print(void f() {});
-//              ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/illegal_named_function_expression_scope.dart:7:14: Error: A function expression can't have a name.
+//   print(void f() {});
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.legacy.transformed.expect b/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.legacy.transformed.expect
index 9df8705..8469fb4 100644
--- a/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/illegal_named_function_expression_scope.dart:7:14: Error: A function expression can't have a name.
 //   print(void f() {});
 //              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.strong.expect b/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.strong.expect
index eb14ed2..bb2aa3b 100644
--- a/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.strong.expect
+++ b/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/illegal_named_function_expression_scope.dart:7:14: Error: A function expression can't have a name.
-//   print(void f() {});
-//              ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/illegal_named_function_expression_scope.dart:7:14: Error: A function expression can't have a name.
-//   print(void f() {});
-//              ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/illegal_named_function_expression_scope.dart:7:14: Error: A function expression can't have a name.
+//   print(void f() {});
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.strong.transformed.expect b/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.strong.transformed.expect
index 546d092..bb2aa3b 100644
--- a/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/illegal_named_function_expression_scope.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/illegal_named_function_expression_scope.dart:7:14: Error: A function expression can't have a name.
 //   print(void f() {});
 //              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/implicit_new.dart.legacy.expect b/pkg/front_end/testcases/implicit_new.dart.legacy.expect
index d2fd4b41..3d8eba3 100644
--- a/pkg/front_end/testcases/implicit_new.dart.legacy.expect
+++ b/pkg/front_end/testcases/implicit_new.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/implicit_new.dart:18:18: Warning: Method not found: 'Bar'.
 //   var y = prefix.Bar();
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/implicit_new.dart:19:10: Warning: Method not found: 'Bar'.
 //   prefix.Bar();
 //          ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/implicit_new.dart.legacy.transformed.expect b/pkg/front_end/testcases/implicit_new.dart.legacy.transformed.expect
index 5a42d71..3d8eba3 100644
--- a/pkg/front_end/testcases/implicit_new.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/implicit_new.dart.legacy.transformed.expect
@@ -1,4 +1,15 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/implicit_new.dart:18:18: Warning: Method not found: 'Bar'.
+//   var y = prefix.Bar();
+//                  ^^^
+//
+// pkg/front_end/testcases/implicit_new.dart:19:10: Warning: Method not found: 'Bar'.
+//   prefix.Bar();
+//          ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/implicit_new.dart.strong.expect b/pkg/front_end/testcases/implicit_new.dart.strong.expect
index 1ca7013..b6dbe37 100644
--- a/pkg/front_end/testcases/implicit_new.dart.strong.expect
+++ b/pkg/front_end/testcases/implicit_new.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/implicit_new.dart:18:18: Error: Method not found: 'Bar'.
 //   var y = prefix.Bar();
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/implicit_new.dart:19:10: Error: Method not found: 'Bar'.
 //   prefix.Bar();
 //          ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/implicit_new.dart.strong.transformed.expect b/pkg/front_end/testcases/implicit_new.dart.strong.transformed.expect
index 4a56e31..b6dbe37 100644
--- a/pkg/front_end/testcases/implicit_new.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/implicit_new.dart.strong.transformed.expect
@@ -1,4 +1,15 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/implicit_new.dart:18:18: Error: Method not found: 'Bar'.
+//   var y = prefix.Bar();
+//                  ^^^
+//
+// pkg/front_end/testcases/implicit_new.dart:19:10: Error: Method not found: 'Bar'.
+//   prefix.Bar();
+//          ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/incomplete_field_formal_parameter.dart.strong.expect b/pkg/front_end/testcases/incomplete_field_formal_parameter.dart.strong.expect
index 9b7ba9d..47ea45a 100644
--- a/pkg/front_end/testcases/incomplete_field_formal_parameter.dart.strong.expect
+++ b/pkg/front_end/testcases/incomplete_field_formal_parameter.dart.strong.expect
@@ -1,56 +1,31 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:6:11: Error: Expected '.' before this.
-//   C.a(this);
-//           ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:6:11: Error: Expected an identifier, but got ')'.
-//   C.a(this);
-//           ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:7:12: Error: Expected an identifier, but got ')'.
-//   C.b(this.);
-//            ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:8:11: Error: Expected '.' before this.
-//   C.c(this, p);
-//           ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:8:11: Error: Expected an identifier, but got ','.
-//   C.c(this, p);
-//           ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:9:12: Error: Expected an identifier, but got ','.
-//   C.d(this., p);
-//            ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:6:11: Error: Expected '.' before this.
-//   C.a(this);
-//           ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:6:11: Error: Expected an identifier, but got ')'.
-//   C.a(this);
-//           ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:7:12: Error: Expected an identifier, but got ')'.
-//   C.b(this.);
-//            ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:8:11: Error: Expected '.' before this.
-//   C.c(this, p);
-//           ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:8:11: Error: Expected an identifier, but got ','.
-//   C.c(this, p);
-//           ^
-//
-// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:9:12: Error: Expected an identifier, but got ','.
-//   C.d(this., p);
-//            ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:6:11: Error: Expected '.' before this.
+//   C.a(this);
+//           ^
+//
+// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:6:11: Error: Expected an identifier, but got ')'.
+//   C.a(this);
+//           ^
+//
+// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:7:12: Error: Expected an identifier, but got ')'.
+//   C.b(this.);
+//            ^
+//
+// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:8:11: Error: Expected '.' before this.
+//   C.c(this, p);
+//           ^
+//
+// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:8:11: Error: Expected an identifier, but got ','.
+//   C.c(this, p);
+//           ^
+//
+// pkg/front_end/testcases/incomplete_field_formal_parameter.dart:9:12: Error: Expected an identifier, but got ','.
+//   C.d(this., p);
+//            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/incomplete_field_formal_parameter.dart.strong.transformed.expect b/pkg/front_end/testcases/incomplete_field_formal_parameter.dart.strong.transformed.expect
index 6bcd2e6..47ea45a 100644
--- a/pkg/front_end/testcases/incomplete_field_formal_parameter.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/incomplete_field_formal_parameter.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/incomplete_field_formal_parameter.dart:6:11: Error: Expected '.' before this.
 //   C.a(this);
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/incomplete_field_formal_parameter.dart:9:12: Error: Expected an identifier, but got ','.
 //   C.d(this., p);
 //            ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/incremental_bulk_compiler_full.status b/pkg/front_end/testcases/incremental_bulk_compiler_full.status
index 9ceffba..abce6e7 100644
--- a/pkg/front_end/testcases/incremental_bulk_compiler_full.status
+++ b/pkg/front_end/testcases/incremental_bulk_compiler_full.status
@@ -1,13 +1,8 @@
 # Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE.md file.
-language_2/deferred_super_dependency_test: Crash # missing "#errors"
-language_2/duplicate_export_collision_test: Crash # missing '#errors'
-language_2/import_nonexisting_dart_uri_test: Crash # missing '#errors'
 language_2/internal_library_test: Crash # non-identical '#errors'
 language_2/missing_part_of_tag_test: Crash # missing empty library that shouldn't have been there in the first place
-language_2/mixin_type_parameter_inference_error_test: Crash # non-identical '#errors'
-language_2/part_of_multiple_libs_test: Crash # missing "#errors"
 language_2/part_refers_to_core_library_test: Crash # non-identical '#errors'
-language_2/script1_negative_test: Crash # missing "#errors", missing empty library that shouldn't have been there in the first place
-language_2/script2_negative_test: Crash # missing "#errors", missing empty library that shouldn't have been there in the first place
+language_2/script1_negative_test: Crash # missing empty library that shouldn't have been there in the first place
+language_2/script2_negative_test: Crash # missing empty library that shouldn't have been there in the first place
diff --git a/pkg/front_end/testcases/incremental_bulk_compiler_smoke.status b/pkg/front_end/testcases/incremental_bulk_compiler_smoke.status
index 959cc51..f47d8ec 100644
--- a/pkg/front_end/testcases/incremental_bulk_compiler_smoke.status
+++ b/pkg/front_end/testcases/incremental_bulk_compiler_smoke.status
@@ -1,8 +1,6 @@
 # Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE.md file.
-
-language_2/deferred_super_dependency_test: Crash # missing "#errors"
 language_2/missing_part_of_tag_test: Crash # missing empty library that shouldn't have been there in the first place
-language_2/script1_negative_test: Crash # missing "#errors", missing empty library that shouldn't have been there in the first place
-language_2/script2_negative_test: Crash # missing "#errors", missing empty library that shouldn't have been there in the first place
+language_2/script1_negative_test: Crash # missing empty library that shouldn't have been there in the first place
+language_2/script2_negative_test: Crash # missing empty library that shouldn't have been there in the first place
diff --git a/pkg/front_end/testcases/inference/abstract_class_instantiation.dart.legacy.expect b/pkg/front_end/testcases/inference/abstract_class_instantiation.dart.legacy.expect
index 1f9b70e..a9fa8e3 100644
--- a/pkg/front_end/testcases/inference/abstract_class_instantiation.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/abstract_class_instantiation.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/abstract_class_instantiation.dart:15:27: Warning: The class 'C' is abstract and can't be instantiated.
 //   var /*@type=C*/ x = new C();
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/inference/abstract_class_instantiation.dart:17:48: Warning: The class 'D' is abstract and can't be instantiated.
 //   D<List<int>> z = new /*@typeArgs=List<int>*/ D(/*@typeArgs=int*/ []);
 //                                                ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/abstract_class_instantiation.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/abstract_class_instantiation.dart.legacy.transformed.expect
index 50af77d..a9fa8e3 100644
--- a/pkg/front_end/testcases/inference/abstract_class_instantiation.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/abstract_class_instantiation.dart.legacy.transformed.expect
@@ -1,4 +1,19 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/abstract_class_instantiation.dart:15:27: Warning: The class 'C' is abstract and can't be instantiated.
+//   var /*@type=C*/ x = new C();
+//                           ^
+//
+// pkg/front_end/testcases/inference/abstract_class_instantiation.dart:16:50: Warning: The class 'D' is abstract and can't be instantiated.
+//   var /*@type=D<int>*/ y = new /*@typeArgs=int*/ D(1);
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/abstract_class_instantiation.dart:17:48: Warning: The class 'D' is abstract and can't be instantiated.
+//   D<List<int>> z = new /*@typeArgs=List<int>*/ D(/*@typeArgs=int*/ []);
+//                                                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart.strong.expect b/pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart.strong.expect
index 664ce90..c5376ec 100644
--- a/pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart:12:45: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //     return /*error:RETURN_OF_INVALID_TYPE*/ 1;
 //                                             ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart.strong.transformed.expect
index 373dc38..c5376ec 100644
--- a/pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/block_bodied_lambdas_downwards_incompatible_with_upwards_inference.dart:12:45: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//     return /*error:RETURN_OF_INVALID_TYPE*/ 1;
+//                                             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart.strong.expect b/pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart.strong.expect
index 30ce298..a4231bb 100644
--- a/pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart:35:44: Warning: Must explicitly return a value from a non-void function.
 //       /*@warning=ReturnWithoutExpression*/ return;
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart:65:44: Warning: Must explicitly return a value from a non-void function.
 //       /*@warning=ReturnWithoutExpression*/ return;
 //                                            ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart.strong.transformed.expect
index 5e2379c..a4231bb 100644
--- a/pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart.strong.transformed.expect
@@ -1,4 +1,15 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart:35:44: Warning: Must explicitly return a value from a non-void function.
+//       /*@warning=ReturnWithoutExpression*/ return;
+//                                            ^
+//
+// pkg/front_end/testcases/inference/block_bodied_lambdas_returns.dart:65:44: Warning: Must explicitly return a value from a non-void function.
+//       /*@warning=ReturnWithoutExpression*/ return;
+//                                            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/call_corner_cases.dart.strong.expect b/pkg/front_end/testcases/inference/call_corner_cases.dart.strong.expect
index b088986..3c29fc6 100644
--- a/pkg/front_end/testcases/inference/call_corner_cases.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/call_corner_cases.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/call_corner_cases.dart:27:69: Error: 'fieldB' isn't a function or method and can't be invoked.
 //   var /*@type=dynamic*/ callFieldB = new D(). /*@target=D::fieldB*/ fieldB();
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/inference/call_corner_cases.dart:28:65: Error: 'getB' isn't a function or method and can't be invoked.
 //   var /*@type=dynamic*/ callGetB = new D(). /*@target=D::getB*/ getB();
 //                                                                 ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/call_corner_cases.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/call_corner_cases.dart.strong.transformed.expect
index 3bcb5f4..3c29fc6 100644
--- a/pkg/front_end/testcases/inference/call_corner_cases.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/call_corner_cases.dart.strong.transformed.expect
@@ -1,4 +1,15 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/call_corner_cases.dart:27:69: Error: 'fieldB' isn't a function or method and can't be invoked.
+//   var /*@type=dynamic*/ callFieldB = new D(). /*@target=D::fieldB*/ fieldB();
+//                                                                     ^
+//
+// pkg/front_end/testcases/inference/call_corner_cases.dart:28:65: Error: 'getB' isn't a function or method and can't be invoked.
+//   var /*@type=dynamic*/ callGetB = new D(). /*@target=D::getB*/ getB();
+//                                                                 ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/circular_method_inference.dart.legacy.expect b/pkg/front_end/testcases/inference/circular_method_inference.dart.legacy.expect
index 658bd51..f6fc387 100644
--- a/pkg/front_end/testcases/inference/circular_method_inference.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/circular_method_inference.dart.legacy.expect
@@ -1,24 +1,15 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/circular_method_inference.dart:12:16: Error: 'A' is a supertype of itself.
-// abstract class A extends B {
-//                ^
-//
-// pkg/front_end/testcases/inference/circular_method_inference.dart:16:16: Error: 'B' is a supertype of itself.
-// abstract class B extends A {
-//                ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/circular_method_inference.dart:12:16: Error: 'A' is a supertype of itself.
-// abstract class A extends B {
-//                ^
-//
-// pkg/front_end/testcases/inference/circular_method_inference.dart:16:16: Error: 'B' is a supertype of itself.
-// abstract class B extends A {
-//                ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/circular_method_inference.dart:12:16: Error: 'A' is a supertype of itself.
+// abstract class A extends B {
+//                ^
+//
+// pkg/front_end/testcases/inference/circular_method_inference.dart:16:16: Error: 'B' is a supertype of itself.
+// abstract class B extends A {
+//                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/circular_method_inference.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/circular_method_inference.dart.legacy.transformed.expect
index fa9873c..f6fc387 100644
--- a/pkg/front_end/testcases/inference/circular_method_inference.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/circular_method_inference.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/circular_method_inference.dart:12:16: Error: 'A' is a supertype of itself.
 // abstract class A extends B {
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/inference/circular_method_inference.dart:16:16: Error: 'B' is a supertype of itself.
 // abstract class B extends A {
 //                ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/circular_method_inference.dart.outline.expect b/pkg/front_end/testcases/inference/circular_method_inference.dart.outline.expect
index bd72e73..10e9611 100644
--- a/pkg/front_end/testcases/inference/circular_method_inference.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/circular_method_inference.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/circular_method_inference.dart:12:16: Error: 'A' is a supertype of itself.
 // abstract class A extends B {
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/inference/circular_method_inference.dart:16:16: Error: 'B' is a supertype of itself.
 // abstract class B extends A {
 //                ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/circular_method_inference.dart.strong.expect b/pkg/front_end/testcases/inference/circular_method_inference.dart.strong.expect
index 658bd51..f6fc387 100644
--- a/pkg/front_end/testcases/inference/circular_method_inference.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/circular_method_inference.dart.strong.expect
@@ -1,24 +1,15 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/circular_method_inference.dart:12:16: Error: 'A' is a supertype of itself.
-// abstract class A extends B {
-//                ^
-//
-// pkg/front_end/testcases/inference/circular_method_inference.dart:16:16: Error: 'B' is a supertype of itself.
-// abstract class B extends A {
-//                ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/circular_method_inference.dart:12:16: Error: 'A' is a supertype of itself.
-// abstract class A extends B {
-//                ^
-//
-// pkg/front_end/testcases/inference/circular_method_inference.dart:16:16: Error: 'B' is a supertype of itself.
-// abstract class B extends A {
-//                ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/circular_method_inference.dart:12:16: Error: 'A' is a supertype of itself.
+// abstract class A extends B {
+//                ^
+//
+// pkg/front_end/testcases/inference/circular_method_inference.dart:16:16: Error: 'B' is a supertype of itself.
+// abstract class B extends A {
+//                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/circular_method_inference.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/circular_method_inference.dart.strong.transformed.expect
index fa9873c..f6fc387 100644
--- a/pkg/front_end/testcases/inference/circular_method_inference.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/circular_method_inference.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/circular_method_inference.dart:12:16: Error: 'A' is a supertype of itself.
 // abstract class A extends B {
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/inference/circular_method_inference.dart:16:16: Error: 'B' is a supertype of itself.
 // abstract class B extends A {
 //                ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/circular_reference_via_closures.dart.strong.expect b/pkg/front_end/testcases/inference/circular_reference_via_closures.dart.strong.expect
index a71159f..5b3b71c 100644
--- a/pkg/front_end/testcases/inference/circular_reference_via_closures.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/circular_reference_via_closures.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/circular_reference_via_closures.dart:10:67: Error: Can't infer the type of 'y': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ y = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference/circular_reference_via_closures.dart:8:67: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/circular_reference_via_closures.dart:10:67: Error: Can't infer the type of 'y': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ y = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference/circular_reference_via_closures.dart:8:67: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/circular_reference_via_closures.dart:10:67: Error: Can't infer the type of 'y': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ y = /*@returnType=dynamic*/ () =>
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/circular_reference_via_closures.dart:8:67: Error: Can't infer the type of 'x': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
+//                                                                   ^
+//
 import self as self;
 
 static field dynamic x = () → dynamic => self::y;
diff --git a/pkg/front_end/testcases/inference/circular_reference_via_closures.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/circular_reference_via_closures.dart.strong.transformed.expect
index adfe785..5b3b71c 100644
--- a/pkg/front_end/testcases/inference/circular_reference_via_closures.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/circular_reference_via_closures.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/circular_reference_via_closures.dart:10:67: Error: Can't infer the type of 'y': circularity found during type inference.
 // Specify the type explicitly.
@@ -9,8 +11,7 @@
 // Specify the type explicitly.
 // var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
 //                                                                   ^
-
-library test;
+//
 import self as self;
 
 static field dynamic x = () → dynamic => self::y;
diff --git a/pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart.strong.expect b/pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart.strong.expect
index 3bf5411..a4e4a26 100644
--- a/pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart:10:67: Error: Can't infer the type of 'y': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ y = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart:8:67: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart:10:67: Error: Can't infer the type of 'y': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ y = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart:8:67: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart:10:67: Error: Can't infer the type of 'y': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ y = /*@returnType=dynamic*/ () =>
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart:8:67: Error: Can't infer the type of 'x': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
+//                                                                   ^
+//
 import self as self;
 
 static field dynamic x = () → dynamic => self::y;
diff --git a/pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart.strong.transformed.expect
index 6ac80a6..a4e4a26 100644
--- a/pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/circular_reference_via_closures_initializer_types.dart:10:67: Error: Can't infer the type of 'y': circularity found during type inference.
 // Specify the type explicitly.
@@ -9,8 +11,7 @@
 // Specify the type explicitly.
 // var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
 //                                                                   ^
-
-library test;
+//
 import self as self;
 
 static field dynamic x = () → dynamic => self::y;
diff --git a/pkg/front_end/testcases/inference/conflicts_can_happen.dart.strong.expect b/pkg/front_end/testcases/inference/conflicts_can_happen.dart.strong.expect
index 94fb0d1..1812788 100644
--- a/pkg/front_end/testcases/inference/conflicts_can_happen.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/conflicts_can_happen.dart.strong.expect
@@ -1,88 +1,53 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:25:163: Error: Can't infer the type of 'a': overridden members must all have the same type.
-// Specify the type explicitly.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:31:163: Error: Can't infer the type of 'a': overridden members must all have the same type.
-// Specify the type explicitly.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:25:163: Error: The return type of the method 'C1.a' is 'dynamic', which does not match the return type of the overridden method, 'I1'.
-//  - 'I1' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
-// Change to a subtype of 'I1'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:17:12: Context: This is the overridden method ('a').
-//   final I1 a = null;
-//            ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:25:163: Error: The return type of the method 'C1.a' is 'dynamic', which does not match the return type of the overridden method, 'I2'.
-//  - 'I2' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
-// Change to a subtype of 'I2'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:21:12: Context: This is the overridden method ('a').
-//   final I2 a = null;
-//            ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:31:163: Error: The return type of the method 'C2.a' is 'dynamic', which does not match the return type of the overridden method, 'I2'.
-//  - 'I2' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
-// Change to a subtype of 'I2'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:21:12: Context: This is the overridden method ('a').
-//   final I2 a = null;
-//            ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:31:163: Error: The return type of the method 'C2.a' is 'dynamic', which does not match the return type of the overridden method, 'I1'.
-//  - 'I1' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
-// Change to a subtype of 'I1'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:17:12: Context: This is the overridden method ('a').
-//   final I1 a = null;
-//            ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:25:163: Error: Can't infer the type of 'a': overridden members must all have the same type.
-// Specify the type explicitly.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:31:163: Error: Can't infer the type of 'a': overridden members must all have the same type.
-// Specify the type explicitly.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:25:163: Error: The return type of the method 'C1.a' is 'dynamic', which does not match the return type of the overridden method, 'I1'.
-//  - 'I1' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
-// Change to a subtype of 'I1'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:25:163: Error: The return type of the method 'C1.a' is 'dynamic', which does not match the return type of the overridden method, 'I2'.
-//  - 'I2' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
-// Change to a subtype of 'I2'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:31:163: Error: The return type of the method 'C2.a' is 'dynamic', which does not match the return type of the overridden method, 'I2'.
-//  - 'I2' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
-// Change to a subtype of 'I2'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen.dart:31:163: Error: The return type of the method 'C2.a' is 'dynamic', which does not match the return type of the overridden method, 'I1'.
-//  - 'I1' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
-// Change to a subtype of 'I1'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:25:163: Error: Can't infer the type of 'a': overridden members must all have the same type.
+// Specify the type explicitly.
+//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
+//                                                                                                                                                                   ^
+//
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:31:163: Error: Can't infer the type of 'a': overridden members must all have the same type.
+// Specify the type explicitly.
+//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
+//                                                                                                                                                                   ^
+//
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:25:163: Error: The return type of the method 'C1.a' is 'dynamic', which does not match the return type of the overridden method, 'I1'.
+//  - 'I1' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
+// Change to a subtype of 'I1'.
+//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:17:12: Context: This is the overridden method ('a').
+//   final I1 a = null;
+//            ^
+//
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:25:163: Error: The return type of the method 'C1.a' is 'dynamic', which does not match the return type of the overridden method, 'I2'.
+//  - 'I2' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
+// Change to a subtype of 'I2'.
+//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:21:12: Context: This is the overridden method ('a').
+//   final I2 a = null;
+//            ^
+//
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:31:163: Error: The return type of the method 'C2.a' is 'dynamic', which does not match the return type of the overridden method, 'I2'.
+//  - 'I2' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
+// Change to a subtype of 'I2'.
+//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:21:12: Context: This is the overridden method ('a').
+//   final I2 a = null;
+//            ^
+//
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:31:163: Error: The return type of the method 'C2.a' is 'dynamic', which does not match the return type of the overridden method, 'I1'.
+//  - 'I1' is from 'pkg/front_end/testcases/inference/conflicts_can_happen.dart'.
+// Change to a subtype of 'I1'.
+//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/conflicts_can_happen.dart:17:12: Context: This is the overridden method ('a').
+//   final I1 a = null;
+//            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/conflicts_can_happen2.dart.strong.expect b/pkg/front_end/testcases/inference/conflicts_can_happen2.dart.strong.expect
index 1231802..9b5a480 100644
--- a/pkg/front_end/testcases/inference/conflicts_can_happen2.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/conflicts_can_happen2.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/conflicts_can_happen2.dart:34:163: Error: Can't infer the type of 'a': overridden members must all have the same type.
 // Specify the type explicitly.
@@ -22,27 +24,7 @@
 // pkg/front_end/testcases/inference/conflicts_can_happen2.dart:26:12: Context: This is the overridden method ('a').
 //   final I2 a = null;
 //            ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/conflicts_can_happen2.dart:34:163: Error: Can't infer the type of 'a': overridden members must all have the same type.
-// Specify the type explicitly.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen2.dart:34:163: Error: The return type of the method 'C2.a' is 'dynamic', which does not match the return type of the overridden method, 'I1'.
-//  - 'I1' is from 'pkg/front_end/testcases/inference/conflicts_can_happen2.dart'.
-// Change to a subtype of 'I1'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/conflicts_can_happen2.dart:34:163: Error: The return type of the method 'C2.a' is 'dynamic', which does not match the return type of the overridden method, 'I2'.
-//  - 'I2' is from 'pkg/front_end/testcases/inference/conflicts_can_happen2.dart'.
-// Change to a subtype of 'I2'.
-//   get /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ a =>
-//                                                                                                                                                                   ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart.strong.expect b/pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart.strong.expect
index 511aafd..eff3c30 100644
--- a/pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart:26:56: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   x. /*@target=C::t*/ t = /*error:INVALID_ASSIGNMENT*/ 'hello';
 //                                                        ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart.strong.transformed.expect
index 67464db..daed8df 100644
--- a/pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/constructors_infer_from_arguments.dart:26:56: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   x. /*@target=C::t*/ t = /*error:INVALID_ASSIGNMENT*/ 'hello';
+//                                                        ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart.strong.expect b/pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart.strong.expect
index be82a2e..d1fa08b 100644
--- a/pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart.strong.expect
@@ -1,42 +1,27 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:22:56: Error: Inferred type argument 'NotA' doesn't conform to the bound 'A' of the type variable 'T' on 'C'.
-//  - 'NotA' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//       new /*error:COULD_NOT_INFER*/ /*@typeArgs=NotA*/ C(myF);
-//                                                        ^
-// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:12:9: Context: This is the type variable whose bound isn't conformed to.
-// class C<T extends A> {
-//         ^
-//
-// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:21:25: Error: Inferred type argument 'NotA' doesn't conform to the bound 'A' of the type variable 'T' on 'C'.
-//  - 'NotA' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//   var /*@type=C<NotA>*/ x =
-//                         ^
-// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:12:9: Context: This is the type variable whose bound isn't conformed to.
-// class C<T extends A> {
-//         ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:22:56: Error: Inferred type argument 'NotA' doesn't conform to the bound 'A' of the type variable 'T' on 'C'.
-//  - 'NotA' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//       new /*error:COULD_NOT_INFER*/ /*@typeArgs=NotA*/ C(myF);
-//                                                        ^
-//
-// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:21:25: Error: Inferred type argument 'NotA' doesn't conform to the bound 'A' of the type variable 'T' on 'C'.
-//  - 'NotA' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//   var /*@type=C<NotA>*/ x =
-//                         ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:22:56: Error: Inferred type argument 'NotA' doesn't conform to the bound 'A' of the type variable 'T' on 'C'.
+//  - 'NotA' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
+// Try specifying type arguments explicitly so that they conform to the bounds.
+//       new /*error:COULD_NOT_INFER*/ /*@typeArgs=NotA*/ C(myF);
+//                                                        ^
+// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:12:9: Context: This is the type variable whose bound isn't conformed to.
+// class C<T extends A> {
+//         ^
+//
+// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:21:25: Error: Inferred type argument 'NotA' doesn't conform to the bound 'A' of the type variable 'T' on 'C'.
+//  - 'NotA' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart'.
+// Try specifying type arguments explicitly so that they conform to the bounds.
+//   var /*@type=C<NotA>*/ x =
+//                         ^
+// pkg/front_end/testcases/inference/constructors_infer_from_arguments_argument_not_assignable.dart:12:9: Context: This is the type variable whose bound isn't conformed to.
+// class C<T extends A> {
+//         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart.strong.expect b/pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart.strong.expect
index db3029e..0593a65 100644
--- a/pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart:22:56: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   x. /*@target=C::t*/ t = /*error:INVALID_ASSIGNMENT*/ 'hello';
 //                                                        ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart.strong.transformed.expect
index 203627e..0593a65 100644
--- a/pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/constructors_infer_from_arguments_factory.dart:22:56: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   x. /*@target=C::t*/ t = /*error:INVALID_ASSIGNMENT*/ 'hello';
+//                                                        ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart.strong.expect b/pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart.strong.expect
index ae1f9cc..fa12dec 100644
--- a/pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart:22:110: Error: Inferred type argument 'Clonable<dynamic>' doesn't conform to the bound 'Clonable<T>' of the type variable 'T' on 'Pair'.
 //  - 'Clonable' is from 'pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart'.
@@ -17,22 +19,7 @@
 // pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart:10:35: Context: This is the type variable whose bound isn't conformed to.
 // class Pair<T extends Clonable<T>, U extends Clonable<U>> {
 //                                   ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart:22:110: Error: Inferred type argument 'Clonable<dynamic>' doesn't conform to the bound 'Clonable<T>' of the type variable 'T' on 'Pair'.
-//  - 'Clonable' is from 'pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//       new /*error:COULD_NOT_INFER,error:COULD_NOT_INFER*/ /*@typeArgs=Clonable<dynamic>, Clonable<dynamic>*/ Pair
-//                                                                                                              ^
-//
-// pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart:22:110: Error: Inferred type argument 'Clonable<dynamic>' doesn't conform to the bound 'Clonable<U>' of the type variable 'U' on 'Pair'.
-//  - 'Clonable' is from 'pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//       new /*error:COULD_NOT_INFER,error:COULD_NOT_INFER*/ /*@typeArgs=Clonable<dynamic>, Clonable<dynamic>*/ Pair
-//                                                                                                              ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart.strong.transformed.expect
index b56a3a6..fa12dec 100644
--- a/pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart.strong.transformed.expect
@@ -1,18 +1,25 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart:22:110: Error: Inferred type argument 'Clonable<dynamic>' doesn't conform to the bound 'Clonable<T>' of the type variable 'T' on 'Pair'.
 //  - 'Clonable' is from 'pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
 //       new /*error:COULD_NOT_INFER,error:COULD_NOT_INFER*/ /*@typeArgs=Clonable<dynamic>, Clonable<dynamic>*/ Pair
 //                                                                                                              ^
+// pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart:10:12: Context: This is the type variable whose bound isn't conformed to.
+// class Pair<T extends Clonable<T>, U extends Clonable<U>> {
+//            ^
 //
 // pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart:22:110: Error: Inferred type argument 'Clonable<dynamic>' doesn't conform to the bound 'Clonable<U>' of the type variable 'U' on 'Pair'.
 //  - 'Clonable' is from 'pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
 //       new /*error:COULD_NOT_INFER,error:COULD_NOT_INFER*/ /*@typeArgs=Clonable<dynamic>, Clonable<dynamic>*/ Pair
 //                                                                                                              ^
-
-library test;
+// pkg/front_end/testcases/inference/constructors_inference_f_bounded.dart:10:35: Context: This is the type variable whose bound isn't conformed to.
+// class Pair<T extends Clonable<T>, U extends Clonable<U>> {
+//                                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/do_not_infer_overridden_fields_that_explicitly_say_dynamic_infer.dart.strong.expect b/pkg/front_end/testcases/inference/do_not_infer_overridden_fields_that_explicitly_say_dynamic_infer.dart.strong.expect
index 50b1b8c..a20bdce 100644
--- a/pkg/front_end/testcases/inference/do_not_infer_overridden_fields_that_explicitly_say_dynamic_infer.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/do_not_infer_overridden_fields_that_explicitly_say_dynamic_infer.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/do_not_infer_overridden_fields_that_explicitly_say_dynamic_infer.dart:13:49: Error: The return type of the method 'B.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
 // Change to a subtype of 'int'.
@@ -7,15 +9,7 @@
 // pkg/front_end/testcases/inference/do_not_infer_overridden_fields_that_explicitly_say_dynamic_infer.dart:9:13: Context: This is the overridden method ('x').
 //   final int x = 2;
 //             ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/do_not_infer_overridden_fields_that_explicitly_say_dynamic_infer.dart:13:49: Error: The return type of the method 'B.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
-// Change to a subtype of 'int'.
-//   /*error:INVALID_METHOD_OVERRIDE*/ dynamic get x => 3;
-//                                                 ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart.strong.expect b/pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart.strong.expect
index 1a9cd62..c556866 100644
--- a/pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart:21:63: Error: Inferred type argument 'dynamic' doesn't conform to the bound 'num' of the type variable 'T' on 'max'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//   dynamic c = /*error:COULD_NOT_INFER*/ /*@typeArgs=dynamic*/ max(x, y);
-//                                                               ^
-//
-// pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart:22:77: Error: Inferred type argument 'dynamic' doesn't conform to the bound 'num' of the type variable 'T' on 'max'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//   var /*@type=dynamic*/ d = /*error:COULD_NOT_INFER*/ /*@typeArgs=dynamic*/ max(
-//                                                                             ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart:21:63: Error: Inferred type argument 'dynamic' doesn't conform to the bound 'num' of the type variable 'T' on 'max'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//   dynamic c = /*error:COULD_NOT_INFER*/ /*@typeArgs=dynamic*/ max(x, y);
-//                                                               ^
-//
-// pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart:22:77: Error: Inferred type argument 'dynamic' doesn't conform to the bound 'num' of the type variable 'T' on 'max'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//   var /*@type=dynamic*/ d = /*error:COULD_NOT_INFER*/ /*@typeArgs=dynamic*/ max(
-//                                                                             ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart:21:63: Error: Inferred type argument 'dynamic' doesn't conform to the bound 'num' of the type variable 'T' on 'max'.
+// Try specifying type arguments explicitly so that they conform to the bounds.
+//   dynamic c = /*error:COULD_NOT_INFER*/ /*@typeArgs=dynamic*/ max(x, y);
+//                                                               ^
+//
+// pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart:22:77: Error: Inferred type argument 'dynamic' doesn't conform to the bound 'num' of the type variable 'T' on 'max'.
+// Try specifying type arguments explicitly so that they conform to the bounds.
+//   var /*@type=dynamic*/ d = /*error:COULD_NOT_INFER*/ /*@typeArgs=dynamic*/ max(
+//                                                                             ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:math" as math;
diff --git a/pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart.strong.transformed.expect
index 77c4e5f..c556866 100644
--- a/pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downward_inference_fixes_no_upwards_errors.dart:21:63: Error: Inferred type argument 'dynamic' doesn't conform to the bound 'num' of the type variable 'T' on 'max'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
@@ -9,8 +11,7 @@
 // Try specifying type arguments explicitly so that they conform to the bounds.
 //   var /*@type=dynamic*/ d = /*error:COULD_NOT_INFER*/ /*@typeArgs=dynamic*/ max(
 //                                                                             ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:math" as math;
diff --git a/pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart.strong.expect
index 32b1bb8..c65e4ae 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart:10:69: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   l = /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"];
 //                                                                     ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart.strong.transformed.expect
index 4acd615..c65e4ae 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_assignment_statements.dart:10:69: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   l = /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"];
+//                                                                     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart.strong.expect
index 2e45dc8..9eda7db 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:32:69: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -49,8 +51,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"],
 //                                                                   ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart.strong.transformed.expect
index 7a852a4..9eda7db 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart.strong.transformed.expect
@@ -1,4 +1,57 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:32:69: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]);
+//                                                                     ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:34:48: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:41:48: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:44:48: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:51:69: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]);
+//                                                                     ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:53:48: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:62:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:65:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"],
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:74:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_constructor_arguments_infer_downwards.dart:77:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"],
+//                                                                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart.strong.expect
index c4111f5..00e805a 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:16:68: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -49,8 +51,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"],
 //                                                                   ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart.strong.transformed.expect
index fbf4cc4..00e805a 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart.strong.transformed.expect
@@ -1,4 +1,57 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:16:68: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   f0(/*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]);
+//                                                                    ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:17:68: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   f0(/*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello", 3]);
+//                                                                    ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:21:71: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   f1(a: /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]);
+//                                                                       ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:23:48: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:29:68: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   f2(/*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]);
+//                                                                    ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:30:68: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   f2(/*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello", 3]);
+//                                                                    ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:37:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:40:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"],
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:49:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_arguments_infer_downwards.dart:52:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"],
+//                                                                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart.strong.expect
index 979504b..225aa59 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:15:66: Error: A value of type 'String Function(String)' can't be assigned to a variable of type 'String Function(int)'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String Function(int)'.
@@ -55,8 +57,7 @@
 // Try correcting the name to the name of an existing method, or defining a method named 'substring'.
 //             .substring(3);
 //              ^^^^^^^^^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart.strong.transformed.expect
index 3d5f44a..1d1b281 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart.strong.transformed.expect
@@ -1,4 +1,63 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:15:66: Error: A value of type 'String Function(String)' can't be assigned to a variable of type 'String Function(int)'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String Function(int)'.
+//         l2 = /*error:INVALID_ASSIGNMENT*/ /*@returnType=String*/ (String x) =>
+//                                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:18:77: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//         l3 = /*error:INVALID_ASSIGNMENT*/ /*@returnType=String*/ (int x) => 3;
+//                                                                             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:20:47: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       return /*error:RETURN_OF_INVALID_TYPE*/ 3;
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:29:13: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//             3;
+//             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:31:47: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       return /*error:RETURN_OF_INVALID_TYPE*/ 3;
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:34:47: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       return /*error:RETURN_OF_INVALID_TYPE*/ x;
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:42:72: Error: A value of type 'List<String> Function(String)' can't be assigned to a variable of type 'List<String> Function(int)'.
+//  - 'List' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'List<String> Function(int)'.
+//         l2 = /*error:INVALID_ASSIGNMENT*/ /*@returnType=List<String>*/ (String
+//                                                                        ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:46:58: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//               /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                          ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:50:52: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//         /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                    ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:60:13: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//             x;
+//             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_function_expressions.dart:63:14: Error: The method 'substring' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing method, or defining a method named 'substring'.
+//             .substring(3);
+//              ^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart.strong.expect
index 1098360..7a7d29f 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:32:69: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -49,8 +51,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"],
 //                                                                   ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart.strong.transformed.expect
index 6578cb4..7a7d29f 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart.strong.transformed.expect
@@ -1,4 +1,57 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:32:69: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]);
+//                                                                     ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:34:48: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:41:48: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:44:48: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:51:69: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]);
+//                                                                     ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:53:48: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:62:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:65:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"],
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:74:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"]
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_constructor_arguments_infer_downwards.dart:77:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     /*@typeArgs=int*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"],
+//                                                                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart.strong.expect
index 734c5ca..22ce919 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:14:65: Error: A value of type 'String Function<T>(String)' can't be assigned to a variable of type 'String Function<S>(int)'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String Function<S>(int)'.
@@ -55,8 +57,7 @@
 // Try correcting the name to the name of an existing method, or defining a method named 'substring'.
 //         .substring(3);
 //          ^^^^^^^^^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart.strong.transformed.expect
index 0df8be8..77683db 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart.strong.transformed.expect
@@ -1,4 +1,63 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:14:65: Error: A value of type 'String Function<T>(String)' can't be assigned to a variable of type 'String Function<S>(int)'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String Function<S>(int)'.
+//     v = /*error:INVALID_ASSIGNMENT*/ <T> /*@returnType=String*/ (String x) =>
+//                                                                 ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:16:76: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//     v = /*error:INVALID_ASSIGNMENT*/ <T> /*@returnType=String*/ (int x) => 3;
+//                                                                            ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:18:47: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       return /*error:RETURN_OF_INVALID_TYPE*/ 3;
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:28:9: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//         3;
+//         ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:30:47: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       return /*error:RETURN_OF_INVALID_TYPE*/ 3;
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:33:47: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       return /*error:RETURN_OF_INVALID_TYPE*/ x;
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:43:71: Error: A value of type 'List<String> Function<T>(String)' can't be assigned to a variable of type 'List<String> Function<S>(int)'.
+//  - 'List' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'List<String> Function<S>(int)'.
+//     v = /*error:INVALID_ASSIGNMENT*/ <T> /*@returnType=List<String>*/ (String
+//                                                                       ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:46:54: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//           /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                      ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:50:52: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//         /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                    ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:64:9: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//         x;
+//         ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_generic_function_expressions.dart:66:10: Error: The method 'substring' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing method, or defining a method named 'substring'.
+//         .substring(3);
+//          ^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart.strong.expect
index 722f65a..8ca9a95 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:46:50: Error: The constructor returns type 'A<int, dynamic>' that isn't of expected type 'A<int, String>'.
 //  - 'A' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
@@ -138,8 +140,7 @@
 // Try changing the type of the parameter, or casting the argument to 'int'.
 //         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ "hello");
 //                                                ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart.strong.transformed.expect
index 39595b3..8ca9a95 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart.strong.transformed.expect
@@ -1,4 +1,146 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:46:50: Error: The constructor returns type 'A<int, dynamic>' that isn't of expected type 'A<int, String>'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+// Change the type of the object being constructed or the context in which it is used.
+//         a4 = /*error:INVALID_CAST_NEW_EXPR*/ new A<int, dynamic>(3, "hello");
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:48:50: Error: The constructor returns type 'A<dynamic, dynamic>' that isn't of expected type 'A<int, String>'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+// Change the type of the object being constructed or the context in which it is used.
+//         a5 = /*error:INVALID_CAST_NEW_EXPR*/ new A<dynamic, dynamic>.named(
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:53:48: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:54:48: Error: The argument type 'int' can't be assigned to the parameter type 'String'.
+// Try changing the type of the parameter, or casting the argument to 'String'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 3);
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:56:48: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:57:48: Error: The argument type 'int' can't be assigned to the parameter type 'String'.
+// Try changing the type of the parameter, or casting the argument to 'String'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 3);
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:65:47: Error: A value of type 'B<String, dynamic>' can't be assigned to a variable of type 'A<int, String>'.
+//  - 'B' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'A<int, String>'.
+//         a4 = /*error:INVALID_ASSIGNMENT*/ new B<String, dynamic>("hello", 3);
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:67:47: Error: A value of type 'B<dynamic, dynamic>' can't be assigned to a variable of type 'A<int, String>'.
+//  - 'B' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'A<int, String>'.
+//         a5 = /*error:INVALID_ASSIGNMENT*/ new B<dynamic, dynamic>.named(
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:72:48: Error: The argument type 'int' can't be assigned to the parameter type 'String'.
+// Try changing the type of the parameter, or casting the argument to 'String'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 3,
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:73:48: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ "hello");
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:75:48: Error: The argument type 'int' can't be assigned to the parameter type 'String'.
+// Try changing the type of the parameter, or casting the argument to 'String'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 3,
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:76:48: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ "hello");
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:83:55: Error: A value of type 'C<dynamic>' can't be assigned to a variable of type 'A<int, int>'.
+//  - 'C' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'A<int, int>'.
+//     A<int, int> a4 = /*error:INVALID_ASSIGNMENT*/ new C<dynamic>(3);
+//                                                       ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:84:55: Error: A value of type 'C<dynamic>' can't be assigned to a variable of type 'A<int, int>'.
+//  - 'C' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'A<int, int>'.
+//     A<int, int> a5 = /*error:INVALID_ASSIGNMENT*/ new C<dynamic>.named(3);
+//                                                       ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:88:48: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ "hello");
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:90:48: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ "hello");
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:98:47: Error: A value of type 'D<num, dynamic>' can't be assigned to a variable of type 'A<int, String>'.
+//  - 'D' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'A<int, String>'.
+//         a4 = /*error:INVALID_ASSIGNMENT*/ new D<num, dynamic>("hello");
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:100:47: Error: A value of type 'D<dynamic, dynamic>' can't be assigned to a variable of type 'A<int, String>'.
+//  - 'D' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+//  - 'A' is from 'pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'A<int, String>'.
+//         a5 = /*error:INVALID_ASSIGNMENT*/ new D<dynamic, dynamic>.named(
+//                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:105:48: Error: The argument type 'int' can't be assigned to the parameter type 'String'.
+// Try changing the type of the parameter, or casting the argument to 'String'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 3);
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:107:48: Error: The argument type 'int' can't be assigned to the parameter type 'String'.
+// Try changing the type of the parameter, or casting the argument to 'String'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 3);
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:118:54: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//           /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"
+//                                                      ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:121:54: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//           /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                      ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:129:48: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:130:48: Error: The argument type 'int' can't be assigned to the parameter type 'String'.
+// Try changing the type of the parameter, or casting the argument to 'String'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 3);
+//                                                ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_instance_creations_infer_downwards.dart:134:48: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//         /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ "hello");
+//                                                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart.strong.expect
index 16af88a..c7a14c1 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:11:89: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
@@ -68,8 +70,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE,error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
 //                                                                                         ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart.strong.transformed.expect
index 99954ce..c7a14c1 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart.strong.transformed.expect
@@ -1,4 +1,76 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:11:89: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE,error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ 42
+//                                                                                         ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:19:50: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:22:50: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:33:61: Error: The list literal type 'List<num>' isn't of expected type 'List<int>'.
+//  - 'List' is from 'dart:core'.
+// Change the type of the list literal or the context in which it is used.
+//     List<int> l0 = /*error:INVALID_CAST_LITERAL_LIST*/ <num>[];
+//                                                             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:34:61: Error: The list literal type 'List<num>' isn't of expected type 'List<int>'.
+//  - 'List' is from 'dart:core'.
+// Change the type of the list literal or the context in which it is used.
+//     List<int> l1 = /*error:INVALID_CAST_LITERAL_LIST*/ <num>[3];
+//                                                             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:36:50: Error: A value of type 'String' can't be assigned to a variable of type 'num'.
+// Try changing the type of the left hand side, or casting the right hand side to 'num'.
+//       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:35:61: Error: The list literal type 'List<num>' isn't of expected type 'List<int>'.
+//  - 'List' is from 'dart:core'.
+// Change the type of the list literal or the context in which it is used.
+//     List<int> l2 = /*error:INVALID_CAST_LITERAL_LIST*/ <num>[
+//                                                             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:39:50: Error: A value of type 'String' can't be assigned to a variable of type 'num'.
+// Try changing the type of the left hand side, or casting the right hand side to 'num'.
+//       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:38:61: Error: The list literal type 'List<num>' isn't of expected type 'List<int>'.
+//  - 'List' is from 'dart:core'.
+// Change the type of the list literal or the context in which it is used.
+//     List<int> l3 = /*error:INVALID_CAST_LITERAL_LIST*/ <num>[
+//                                                             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:47:50: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:50:50: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:58:89: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE,error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello"
+//                                                                                         ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_list_literals_infer_downwards.dart:61:89: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE,error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ "hello",
+//                                                                                         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart.strong.expect
index 6a9da87..de242ae 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:12:79: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -82,8 +84,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //           /*error:MAP_VALUE_TYPE_NOT_ASSIGNABLE,error:MAP_VALUE_TYPE_NOT_ASSIGNABLE*/ 3
 //                                                                                       ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart.strong.transformed.expect
index 08e5b5e..de242ae 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart.strong.transformed.expect
@@ -1,4 +1,90 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:12:79: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:MAP_KEY_TYPE_NOT_ASSIGNABLE,error:MAP_KEY_TYPE_NOT_ASSIGNABLE*/ "hello":
+//                                                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:20:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:MAP_KEY_TYPE_NOT_ASSIGNABLE*/ "hello": "hello"
+//                                             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:23:50: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       3: /*error:MAP_VALUE_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:27:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:MAP_KEY_TYPE_NOT_ASSIGNABLE*/ "hello":
+//                                             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:28:51: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//           /*error:MAP_VALUE_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:48:50: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       3: /*error:MAP_VALUE_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                  ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:52:56: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       "hello": /*error:MAP_VALUE_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                        ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:59:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:MAP_KEY_TYPE_NOT_ASSIGNABLE*/ "hello": "hello"
+//                                             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:64:45: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:MAP_KEY_TYPE_NOT_ASSIGNABLE*/ "hello": 3
+//                                             ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:68:76: Error: The map literal type 'Map<num, dynamic>' isn't of expected type 'Map<int, String>'.
+//  - 'Map' is from 'dart:core'.
+// Change the type of the map literal or the context in which it is used.
+//     Map<int, String> l0 = /*error:INVALID_CAST_LITERAL_MAP*/ <num, dynamic>{};
+//                                                                            ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:69:76: Error: The map literal type 'Map<num, dynamic>' isn't of expected type 'Map<int, String>'.
+//  - 'Map' is from 'dart:core'.
+// Change the type of the map literal or the context in which it is used.
+//     Map<int, String> l1 = /*error:INVALID_CAST_LITERAL_MAP*/ <num, dynamic>{
+//                                                                            ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:72:76: Error: The map literal type 'Map<num, dynamic>' isn't of expected type 'Map<int, String>'.
+//  - 'Map' is from 'dart:core'.
+// Change the type of the map literal or the context in which it is used.
+//     Map<int, String> l3 = /*error:INVALID_CAST_LITERAL_MAP*/ <num, dynamic>{
+//                                                                            ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:80:79: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:MAP_KEY_TYPE_NOT_ASSIGNABLE,error:MAP_KEY_TYPE_NOT_ASSIGNABLE*/ "hello":
+//                                                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:84:86: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//       3: /*error:MAP_VALUE_TYPE_NOT_ASSIGNABLE,error:MAP_VALUE_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                                                      ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:88:79: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:MAP_KEY_TYPE_NOT_ASSIGNABLE,error:MAP_KEY_TYPE_NOT_ASSIGNABLE*/ "hello":
+//                                                                               ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_on_map_literals.dart:89:87: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//           /*error:MAP_VALUE_TYPE_NOT_ASSIGNABLE,error:MAP_VALUE_TYPE_NOT_ASSIGNABLE*/ 3
+//                                                                                       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart.strong.expect b/pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart.strong.expect
index 5504acd..746937d 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart:16:67: Error: A value of type 'MyStream<dynamic>' can't be assigned to a variable of type 'List<int>'.
 //  - 'MyStream' is from 'pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart'.
@@ -27,8 +29,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'Iterable<Map<int, int>>'.
 //   yield* /*error:YIELD_OF_INVALID_TYPE*/ new /*@typeArgs=dynamic, dynamic*/ Map();
 //                                                                             ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart.strong.transformed.expect
index 4ff259f..17470e4 100644
--- a/pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart.strong.transformed.expect
@@ -1,4 +1,35 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart:16:67: Error: A value of type 'MyStream<dynamic>' can't be assigned to a variable of type 'List<int>'.
+//  - 'MyStream' is from 'pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart'.
+//  - 'List' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'List<int>'.
+//   yield /*error:YIELD_OF_INVALID_TYPE*/ new /*@typeArgs=dynamic*/ MyStream();
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart:17:68: Error: A value of type 'List<dynamic>' can't be assigned to a variable of type 'Stream<List<int>>'.
+//  - 'List' is from 'dart:core'.
+//  - 'Stream' is from 'dart:async'.
+// Try changing the type of the left hand side, or casting the right hand side to 'Stream<List<int>>'.
+//   yield* /*error:YIELD_OF_INVALID_TYPE*/ new /*@typeArgs=dynamic*/ List();
+//                                                                    ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart:23:67: Error: A value of type 'List<dynamic>' can't be assigned to a variable of type 'Map<int, int>'.
+//  - 'List' is from 'dart:core'.
+//  - 'Map' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'Map<int, int>'.
+//   yield /*error:YIELD_OF_INVALID_TYPE*/ new /*@typeArgs=dynamic*/ List();
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/downwards_inference_yield_yield_star.dart:24:77: Error: A value of type 'Map<dynamic, dynamic>' can't be assigned to a variable of type 'Iterable<Map<int, int>>'.
+//  - 'Map' is from 'dart:core'.
+//  - 'Iterable' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'Iterable<Map<int, int>>'.
+//   yield* /*error:YIELD_OF_INVALID_TYPE*/ new /*@typeArgs=dynamic, dynamic*/ Map();
+//                                                                             ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/dynamic_methods.dart.strong.expect b/pkg/front_end/testcases/inference/dynamic_methods.dart.strong.expect
index b709a6f..3b2679a 100644
--- a/pkg/front_end/testcases/inference/dynamic_methods.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/dynamic_methods.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/dynamic_methods.dart:16:39: Error: 'hashCode' isn't a function or method and can't be invoked.
 //       d. /*@target=Object::hashCode*/ hashCode();
 //                                       ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/dynamic_methods.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/dynamic_methods.dart.strong.transformed.expect
index 49e07c8..3b2679a 100644
--- a/pkg/front_end/testcases/inference/dynamic_methods.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/dynamic_methods.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/dynamic_methods.dart:16:39: Error: 'hashCode' isn't a function or method and can't be invoked.
+//       d. /*@target=Object::hashCode*/ hashCode();
+//                                       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/future_then_upwards.dart.strong.expect b/pkg/front_end/testcases/inference/future_then_upwards.dart.strong.expect
index 577085e..34484af 100644
--- a/pkg/front_end/testcases/inference/future_then_upwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/future_then_upwards.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/future_then_upwards.dart:21:49: Error: A value of type 'MyFuture<double>' can't be assigned to a variable of type 'Future<int>'.
 //  - 'MyFuture' is from 'pkg/front_end/testcases/inference/future_then_upwards.dart'.
@@ -6,8 +8,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'Future<int>'.
 //   Future<int> f2 = /*error:INVALID_ASSIGNMENT*/ f;
 //                                                 ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/future_then_upwards.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/future_then_upwards.dart.strong.transformed.expect
index cbcb2db..34484af 100644
--- a/pkg/front_end/testcases/inference/future_then_upwards.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/future_then_upwards.dart.strong.transformed.expect
@@ -1,4 +1,14 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/future_then_upwards.dart:21:49: Error: A value of type 'MyFuture<double>' can't be assigned to a variable of type 'Future<int>'.
+//  - 'MyFuture' is from 'pkg/front_end/testcases/inference/future_then_upwards.dart'.
+//  - 'Future' is from 'dart:async'.
+// Try changing the type of the left hand side, or casting the right hand side to 'Future<int>'.
+//   Future<int> f2 = /*error:INVALID_ASSIGNMENT*/ f;
+//                                                 ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/future_then_upwards_2.dart.strong.expect b/pkg/front_end/testcases/inference/future_then_upwards_2.dart.strong.expect
index 30b1ac3..23e64ac 100644
--- a/pkg/front_end/testcases/inference/future_then_upwards_2.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/future_then_upwards_2.dart.strong.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/future_then_upwards_2.dart:21:51: Error: A value of type 'MyFuture<double>' can't be assigned to a variable of type 'MyFuture<int>'.
 //  - 'MyFuture' is from 'pkg/front_end/testcases/inference/future_then_upwards_2.dart'.
 // Try changing the type of the left hand side, or casting the right hand side to 'MyFuture<int>'.
 //   MyFuture<int> f2 = /*error:INVALID_ASSIGNMENT*/ f;
 //                                                   ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/future_then_upwards_2.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/future_then_upwards_2.dart.strong.transformed.expect
index 064084c..23e64ac 100644
--- a/pkg/front_end/testcases/inference/future_then_upwards_2.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/future_then_upwards_2.dart.strong.transformed.expect
@@ -1,4 +1,13 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/future_then_upwards_2.dart:21:51: Error: A value of type 'MyFuture<double>' can't be assigned to a variable of type 'MyFuture<int>'.
+//  - 'MyFuture' is from 'pkg/front_end/testcases/inference/future_then_upwards_2.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'MyFuture<int>'.
+//   MyFuture<int> f2 = /*error:INVALID_ASSIGNMENT*/ f;
+//                                                   ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/future_then_upwards_3.dart.strong.expect b/pkg/front_end/testcases/inference/future_then_upwards_3.dart.strong.expect
index a20ab5b..4a1facb 100644
--- a/pkg/front_end/testcases/inference/future_then_upwards_3.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/future_then_upwards_3.dart.strong.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/future_then_upwards_3.dart:21:49: Error: A value of type 'Future<double>' can't be assigned to a variable of type 'Future<int>'.
 //  - 'Future' is from 'dart:async'.
 // Try changing the type of the left hand side, or casting the right hand side to 'Future<int>'.
 //   Future<int> f2 = /*error:INVALID_ASSIGNMENT*/ f;
 //                                                 ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/future_then_upwards_3.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/future_then_upwards_3.dart.strong.transformed.expect
index 32706f4..4a1facb 100644
--- a/pkg/front_end/testcases/inference/future_then_upwards_3.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/future_then_upwards_3.dart.strong.transformed.expect
@@ -1,4 +1,13 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/future_then_upwards_3.dart:21:49: Error: A value of type 'Future<double>' can't be assigned to a variable of type 'Future<int>'.
+//  - 'Future' is from 'dart:async'.
+// Try changing the type of the left hand side, or casting the right hand side to 'Future<int>'.
+//   Future<int> f2 = /*error:INVALID_ASSIGNMENT*/ f;
+//                                                 ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/future_union_downwards.dart.strong.expect b/pkg/front_end/testcases/inference/future_union_downwards.dart.strong.expect
index ee2dc78..b61a291 100644
--- a/pkg/front_end/testcases/inference/future_union_downwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/future_union_downwards.dart.strong.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/future_union_downwards.dart:21:44: Error: The argument type 'String' can't be assigned to the parameter type 'FutureOr<int>'.
 //  - 'FutureOr' is from 'dart:async'.
 // Try changing the type of the parameter, or casting the argument to 'FutureOr<int>'.
 //         new /*@typeArgs=int*/ Future.value('hi'));
 //                                            ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/future_union_downwards.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/future_union_downwards.dart.strong.transformed.expect
index 53247c8..e568f59 100644
--- a/pkg/front_end/testcases/inference/future_union_downwards.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/future_union_downwards.dart.strong.transformed.expect
@@ -1,4 +1,13 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/future_union_downwards.dart:21:44: Error: The argument type 'String' can't be assigned to the parameter type 'FutureOr<int>'.
+//  - 'FutureOr' is from 'dart:async'.
+// Try changing the type of the parameter, or casting the argument to 'FutureOr<int>'.
+//         new /*@typeArgs=int*/ Future.value('hi'));
+//                                            ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/future_union_downwards_3.dart.strong.expect b/pkg/front_end/testcases/inference/future_union_downwards_3.dart.strong.expect
index 82b86ca..bea79cc 100644
--- a/pkg/front_end/testcases/inference/future_union_downwards_3.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/future_union_downwards_3.dart.strong.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/future_union_downwards_3.dart:21:44: Error: The argument type 'String' can't be assigned to the parameter type 'FutureOr<int>'.
 //  - 'FutureOr' is from 'dart:async'.
 // Try changing the type of the parameter, or casting the argument to 'FutureOr<int>'.
 //         new /*@typeArgs=int*/ Future.value('hi'));
 //                                            ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/future_union_downwards_3.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/future_union_downwards_3.dart.strong.transformed.expect
index 3e0356f..96aa1c7 100644
--- a/pkg/front_end/testcases/inference/future_union_downwards_3.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/future_union_downwards_3.dart.strong.transformed.expect
@@ -1,4 +1,13 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/future_union_downwards_3.dart:21:44: Error: The argument type 'String' can't be assigned to the parameter type 'FutureOr<int>'.
+//  - 'FutureOr' is from 'dart:async'.
+// Try changing the type of the parameter, or casting the argument to 'FutureOr<int>'.
+//         new /*@typeArgs=int*/ Future.value('hi'));
+//                                            ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart.strong.expect b/pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart.strong.expect
index 2fec18a..fce5b7e 100644
--- a/pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart.strong.expect
@@ -1,20 +1,13 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart:26:77: Error: Inferred type argument 'int' doesn't conform to the bound 'String' of the type variable 'U' on 'Foo<String>.method'.
-//  - 'Foo' is from 'pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//       . /*error:COULD_NOT_INFER*/ /*@typeArgs=int*/ /*@target=Foo::method*/ method(
-//                                                                             ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart:26:77: Error: Inferred type argument 'int' doesn't conform to the bound 'String' of the type variable 'U' on 'Foo<String>.method'.
-//  - 'Foo' is from 'pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-//       . /*error:COULD_NOT_INFER*/ /*@typeArgs=int*/ /*@target=Foo::method*/ method(
-//                                                                             ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart:26:77: Error: Inferred type argument 'int' doesn't conform to the bound 'String' of the type variable 'U' on 'Foo<String>.method'.
+//  - 'Foo' is from 'pkg/front_end/testcases/inference/generic_methods_correctly_recognize_generic_upper_bound.dart'.
+// Try specifying type arguments explicitly so that they conform to the bounds.
+//       . /*error:COULD_NOT_INFER*/ /*@typeArgs=int*/ /*@target=Foo::method*/ method(
+//                                                                             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart.strong.expect b/pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart.strong.expect
index d2c81cf..8e3a378 100644
--- a/pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart:28:69: Error: The argument type 'double' can't be assigned to the parameter type 'int'.
 // Try changing the type of the parameter, or casting the argument to 'int'.
@@ -19,8 +21,7 @@
 // Try changing the type of the parameter, or casting the argument to 'int'.
 //       /*@error=ArgumentTypeNotAssignable*/ "there"));
 //                                            ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:math" as math;
diff --git a/pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart.strong.transformed.expect
index c7f9ea6..8e3a378 100644
--- a/pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart.strong.transformed.expect
@@ -1,4 +1,27 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart:28:69: Error: The argument type 'double' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//       /*@typeArgs=int*/ max(1, /*@error=ArgumentTypeNotAssignable*/ 2.0));
+//                                                                     ^
+//
+// pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart:30:69: Error: The argument type 'double' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//       /*@typeArgs=int*/ min(1, /*@error=ArgumentTypeNotAssignable*/ 2.0));
+//                                                                     ^
+//
+// pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart:38:44: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//       /*@error=ArgumentTypeNotAssignable*/ "hi",
+//                                            ^
+//
+// pkg/front_end/testcases/inference/generic_methods_dart_math_min_max.dart:39:44: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//       /*@error=ArgumentTypeNotAssignable*/ "there"));
+//                                            ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:math" as math;
diff --git a/pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart.strong.expect b/pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart.strong.expect
index a4f9811..9b3d956 100644
--- a/pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart.strong.expect
@@ -1,40 +1,26 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:14:64: Error: Declared type variables of 'D.m' doesn't match those on overridden method 'C.m'.
-// /*@error=OverrideTypeMismatchReturnType*/ /*@topType=dynamic*/ m(
-//                                                                ^
-// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:9:5: Context: This is the overridden method ('m').
-//   T m<T>(T x) => x;
-//     ^
-//
-// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:14:64: Error: The return type of the method 'D.m' is 'dynamic', which does not match the return type of the overridden method, 'T'.
-// Change to a subtype of 'T'.
-// /*@error=OverrideTypeMismatchReturnType*/ /*@topType=dynamic*/ m(
-//                                                                ^
-// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:9:5: Context: This is the overridden method ('m').
-//   T m<T>(T x) => x;
-//     ^
-//
-// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:21:106: Error: Expected 0 type arguments.
-//       . /*error:WRONG_NUMBER_OF_TYPE_ARGUMENTS_METHOD*/ /*@target=D::m*/ /*@error=TypeArgumentMismatch*/ m<
-//                                                                                                          ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:14:64: Error: Declared type variables of 'D.m' doesn't match those on overridden method 'C.m'.
-// /*@error=OverrideTypeMismatchReturnType*/ /*@topType=dynamic*/ m(
-//                                                                ^
-//
-// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:14:64: Error: The return type of the method 'D.m' is 'dynamic', which does not match the return type of the overridden method, 'T'.
-// Change to a subtype of 'T'.
-// /*@error=OverrideTypeMismatchReturnType*/ /*@topType=dynamic*/ m(
-//                                                                ^
-//
-// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:21:106: Error: Expected 0 type arguments.
-//       . /*error:WRONG_NUMBER_OF_TYPE_ARGUMENTS_METHOD*/ /*@target=D::m*/ /*@error=TypeArgumentMismatch*/ m<
-//                                                                                                          ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:14:64: Error: Declared type variables of 'D.m' doesn't match those on overridden method 'C.m'.
+// /*@error=OverrideTypeMismatchReturnType*/ /*@topType=dynamic*/ m(
+//                                                                ^
+// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:9:5: Context: This is the overridden method ('m').
+//   T m<T>(T x) => x;
+//     ^
+//
+// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:14:64: Error: The return type of the method 'D.m' is 'dynamic', which does not match the return type of the overridden method, 'T'.
+// Change to a subtype of 'T'.
+// /*@error=OverrideTypeMismatchReturnType*/ /*@topType=dynamic*/ m(
+//                                                                ^
+// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:9:5: Context: This is the overridden method ('m').
+//   T m<T>(T x) => x;
+//     ^
+//
+// pkg/front_end/testcases/inference/generic_methods_do_not_infer_invalid_override_of_generic_method.dart:21:106: Error: Expected 0 type arguments.
+//       . /*error:WRONG_NUMBER_OF_TYPE_ARGUMENTS_METHOD*/ /*@target=D::m*/ /*@error=TypeArgumentMismatch*/ m<
+//                                                                                                          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart.strong.expect b/pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart.strong.expect
index 36362be..3266060 100644
--- a/pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart:13:76: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //           /*@typeArgs=String*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ 42]);
 //                                                                            ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart.strong.transformed.expect
index a0de68d..3266060 100644
--- a/pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/generic_methods_downwards_inference_affects_arguments.dart:13:76: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//           /*@typeArgs=String*/ [/*error:LIST_ELEMENT_TYPE_NOT_ASSIGNABLE*/ 42]);
+//                                                                            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.legacy.expect b/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.legacy.expect
index 44e5758..2b9e694 100644
--- a/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:14:46: Warning: Declared type variables of 'D.m' doesn't match those on overridden method 'C.m'.
 //   T /*@error=OverrideTypeVariablesMismatch*/ m<T>(
@@ -13,8 +15,7 @@
 // pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:10:11: Context: This is the overridden method ('g').
 //   dynamic g(int x) => x;
 //           ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.legacy.transformed.expect
index 9cd9ef8..2b9e694 100644
--- a/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.legacy.transformed.expect
@@ -1,4 +1,21 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:14:46: Warning: Declared type variables of 'D.m' doesn't match those on overridden method 'C.m'.
+//   T /*@error=OverrideTypeVariablesMismatch*/ m<T>(
+//                                              ^
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:9:24: Context: This is the overridden method ('m').
+//   /*@topType=dynamic*/ m(/*@topType=dynamic*/ x) => x;
+//                        ^
+//
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:17:46: Warning: Declared type variables of 'D.g' doesn't match those on overridden method 'C.g'.
+//   T /*@error=OverrideTypeVariablesMismatch*/ g<T>(
+//                                              ^
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:10:11: Context: This is the overridden method ('g').
+//   dynamic g(int x) => x;
+//           ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.strong.expect b/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.strong.expect
index 7df8c64..5d175fa 100644
--- a/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart.strong.expect
@@ -1,56 +1,37 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:14:46: Error: Declared type variables of 'D.m' doesn't match those on overridden method 'C.m'.
-//   T /*@error=OverrideTypeVariablesMismatch*/ m<T>(
-//                                              ^
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:9:24: Context: This is the overridden method ('m').
-//   /*@topType=dynamic*/ m(/*@topType=dynamic*/ x) => x;
-//                        ^
-//
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:15:54: Error: The parameter 'x' of the method 'D.m' has type 'T', which does not match the corresponding type in the overridden method, 'dynamic'.
-// Change to a supertype of 'dynamic', or, for a covariant parameter, a subtype.
-//           T /*@error=OverrideTypeMismatchParameter*/ x) =>
-//                                                      ^
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:9:24: Context: This is the overridden method ('m').
-//   /*@topType=dynamic*/ m(/*@topType=dynamic*/ x) => x;
-//                        ^
-//
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:17:46: Error: Declared type variables of 'D.g' doesn't match those on overridden method 'C.g'.
-//   T /*@error=OverrideTypeVariablesMismatch*/ g<T>(
-//                                              ^
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:10:11: Context: This is the overridden method ('g').
-//   dynamic g(int x) => x;
-//           ^
-//
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:18:54: Error: The parameter 'x' of the method 'D.g' has type 'T', which does not match the corresponding type in the overridden method, 'int'.
-// Change to a supertype of 'int', or, for a covariant parameter, a subtype.
-//           T /*@error=OverrideTypeMismatchParameter*/ x) =>
-//                                                      ^
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:10:11: Context: This is the overridden method ('g').
-//   dynamic g(int x) => x;
-//           ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:14:46: Error: Declared type variables of 'D.m' doesn't match those on overridden method 'C.m'.
-//   T /*@error=OverrideTypeVariablesMismatch*/ m<T>(
-//                                              ^
-//
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:15:54: Error: The parameter 'x' of the method 'D.m' has type 'T', which does not match the corresponding type in the overridden method, 'dynamic'.
-// Change to a supertype of 'dynamic', or, for a covariant parameter, a subtype.
-//           T /*@error=OverrideTypeMismatchParameter*/ x) =>
-//                                                      ^
-//
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:17:46: Error: Declared type variables of 'D.g' doesn't match those on overridden method 'C.g'.
-//   T /*@error=OverrideTypeVariablesMismatch*/ g<T>(
-//                                              ^
-//
-// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:18:54: Error: The parameter 'x' of the method 'D.g' has type 'T', which does not match the corresponding type in the overridden method, 'int'.
-// Change to a supertype of 'int', or, for a covariant parameter, a subtype.
-//           T /*@error=OverrideTypeMismatchParameter*/ x) =>
-//                                                      ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:14:46: Error: Declared type variables of 'D.m' doesn't match those on overridden method 'C.m'.
+//   T /*@error=OverrideTypeVariablesMismatch*/ m<T>(
+//                                              ^
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:9:24: Context: This is the overridden method ('m').
+//   /*@topType=dynamic*/ m(/*@topType=dynamic*/ x) => x;
+//                        ^
+//
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:15:54: Error: The parameter 'x' of the method 'D.m' has type 'T', which does not match the corresponding type in the overridden method, 'dynamic'.
+// Change to a supertype of 'dynamic', or, for a covariant parameter, a subtype.
+//           T /*@error=OverrideTypeMismatchParameter*/ x) =>
+//                                                      ^
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:9:24: Context: This is the overridden method ('m').
+//   /*@topType=dynamic*/ m(/*@topType=dynamic*/ x) => x;
+//                        ^
+//
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:17:46: Error: Declared type variables of 'D.g' doesn't match those on overridden method 'C.g'.
+//   T /*@error=OverrideTypeVariablesMismatch*/ g<T>(
+//                                              ^
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:10:11: Context: This is the overridden method ('g').
+//   dynamic g(int x) => x;
+//           ^
+//
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:18:54: Error: The parameter 'x' of the method 'D.g' has type 'T', which does not match the corresponding type in the overridden method, 'int'.
+// Change to a supertype of 'int', or, for a covariant parameter, a subtype.
+//           T /*@error=OverrideTypeMismatchParameter*/ x) =>
+//                                                      ^
+// pkg/front_end/testcases/inference/generic_methods_handle_override_of_non_generic_with_generic.dart:10:11: Context: This is the overridden method ('g').
+//   dynamic g(int x) => x;
+//           ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart.strong.expect b/pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart.strong.expect
index 688f2c8..d543eaa 100644
--- a/pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart:28:73: Error: The argument type 'num Function(num, num)' can't be assigned to the parameter type 'int Function(double, int)'.
 // Try changing the type of the parameter, or casting the argument to 'int Function(double, int)'.
@@ -29,8 +31,7 @@
 // Try changing the type of the parameter, or casting the argument to 'double Function(int, double)'.
 //           . /*@target=C::m*/ m);
 //                              ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:math" as math;
diff --git a/pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart.strong.transformed.expect
index 8aea3c4..d543eaa 100644
--- a/pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart.strong.transformed.expect
@@ -1,4 +1,37 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart:28:73: Error: The argument type 'num Function(num, num)' can't be assigned to the parameter type 'int Function(double, int)'.
+// Try changing the type of the parameter, or casting the argument to 'int Function(double, int)'.
+//       /*error:COULD_NOT_INFER,error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ math.max);
+//                                                                         ^
+//
+// pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart:30:73: Error: The argument type 'num Function(num, num)' can't be assigned to the parameter type 'double Function(int, double)'.
+// Try changing the type of the parameter, or casting the argument to 'double Function(int, double)'.
+//       /*error:COULD_NOT_INFER,error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ math.max);
+//                                                                         ^
+//
+// pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart:46:72: Error: The argument type 'num Function(num, num)' can't be assigned to the parameter type 'int Function(double, int)'.
+// Try changing the type of the parameter, or casting the argument to 'int Function(double, int)'.
+//   takeIDI(/*error:COULD_NOT_INFER,error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ min);
+//                                                                        ^
+//
+// pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart:47:72: Error: The argument type 'num Function(num, num)' can't be assigned to the parameter type 'double Function(int, double)'.
+// Try changing the type of the parameter, or casting the argument to 'double Function(int, double)'.
+//   takeDID(/*error:COULD_NOT_INFER,error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ min);
+//                                                                        ^
+//
+// pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart:86:30: Error: The argument type 'num Function(num, num)' can't be assigned to the parameter type 'int Function(double, int)'.
+// Try changing the type of the parameter, or casting the argument to 'int Function(double, int)'.
+//           . /*@target=C::m*/ m);
+//                              ^
+//
+// pkg/front_end/testcases/inference/generic_methods_infer_generic_instantiation.dart:89:30: Error: The argument type 'num Function(num, num)' can't be assigned to the parameter type 'double Function(int, double)'.
+// Try changing the type of the parameter, or casting the argument to 'double Function(int, double)'.
+//           . /*@target=C::m*/ m);
+//                              ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:math" as math;
diff --git a/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.legacy.expect b/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.legacy.expect
index 5b0e517..195312f 100644
--- a/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.legacy.expect
@@ -1,13 +1,11 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:8:42: Error: Can't access platform private library.
 // /*error:IMPORT_INTERNAL_LIBRARY*/ import 'dart:_foreign_helper' show JS;
 //                                          ^
 //
-// pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:8:42: Error: Not found: 'dart:_foreign_helper'
-// /*error:IMPORT_INTERNAL_LIBRARY*/ import 'dart:_foreign_helper' show JS;
-//                                          ^
-//
 // pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:11:43: Warning: Method not found: 'JS'.
 //   String x = /*error:INVALID_ASSIGNMENT*/ JS('int', '42');
 //                                           ^^
@@ -15,18 +13,7 @@
 // pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:12:28: Warning: Method not found: 'JS'.
 //   var /*@type=String*/ y = JS('String', '"hello"');
 //                            ^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:8:42: Error: Can't access platform private library.
-// /*error:IMPORT_INTERNAL_LIBRARY*/ import 'dart:_foreign_helper' show JS;
-//                                          ^
-//
-// pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:8:42: Error: Not found: 'dart:_foreign_helper'
-// /*error:IMPORT_INTERNAL_LIBRARY*/ import 'dart:_foreign_helper' show JS;
-//                                          ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.legacy.transformed.expect
index 89adde8..195312f 100644
--- a/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.legacy.transformed.expect
@@ -1,14 +1,19 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:8:42: Error: Can't access platform private library.
 // /*error:IMPORT_INTERNAL_LIBRARY*/ import 'dart:_foreign_helper' show JS;
 //                                          ^
 //
-// pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:8:42: Error: Not found: 'dart:_foreign_helper'
-// /*error:IMPORT_INTERNAL_LIBRARY*/ import 'dart:_foreign_helper' show JS;
-//                                          ^
-
-library test;
+// pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:11:43: Warning: Method not found: 'JS'.
+//   String x = /*error:INVALID_ASSIGNMENT*/ JS('int', '42');
+//                                           ^^
+//
+// pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:12:28: Warning: Method not found: 'JS'.
+//   var /*@type=String*/ y = JS('String', '"hello"');
+//                            ^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.outline.expect b/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.outline.expect
index ce6b792..a73f4ec 100644
--- a/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart.outline.expect
@@ -1,14 +1,11 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:8:42: Error: Can't access platform private library.
 // /*error:IMPORT_INTERNAL_LIBRARY*/ import 'dart:_foreign_helper' show JS;
 //                                          ^
 //
-// pkg/front_end/testcases/inference/generic_methods_infer_js_builtin.dart:8:42: Error: Not found: 'dart:_foreign_helper'
-// /*error:IMPORT_INTERNAL_LIBRARY*/ import 'dart:_foreign_helper' show JS;
-//                                          ^
-
-library test;
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/inference/generic_methods_inference_error.dart.strong.expect b/pkg/front_end/testcases/inference/generic_methods_inference_error.dart.strong.expect
index d2d0114..9b6c3be 100644
--- a/pkg/front_end/testcases/inference/generic_methods_inference_error.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_inference_error.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/generic_methods_inference_error.dart:13:11: Error: A value of type 'double' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //           1.0);
 //           ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_inference_error.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/generic_methods_inference_error.dart.strong.transformed.expect
index fed97ff..9b6c3be 100644
--- a/pkg/front_end/testcases/inference/generic_methods_inference_error.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_inference_error.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/generic_methods_inference_error.dart:13:11: Error: A value of type 'double' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//           1.0);
+//           ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart.strong.expect b/pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart.strong.expect
index 292cf85..92c24d1 100644
--- a/pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart:23:120: Error: The method '+' isn't defined for the class 'FutureOr<String>'.
 //  - 'FutureOr' is from 'dart:async'.
@@ -11,8 +13,7 @@
 // Try changing the type of the parameter, or casting the argument to 'FutureOr<String> Function(FutureOr<String>, int)'.
 //                   /*info:INFERRED_TYPE_CLOSURE,error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ /*@returnType=String*/ (String
 //                                                                                                            ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart.strong.transformed.expect
index 10a7227..9063b64 100644
--- a/pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart.strong.transformed.expect
@@ -1,4 +1,19 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart:23:120: Error: The method '+' isn't defined for the class 'FutureOr<String>'.
+//  - 'FutureOr' is from 'dart:async'.
+// Try correcting the name to the name of an existing method, or defining a method named '+'.
+//                           /*@type=int*/ y) => /*info:DYNAMIC_CAST,info:DYNAMIC_INVOKE*/ x /*error:UNDEFINED_OPERATOR*/ +
+//                                                                                                                        ^
+//
+// pkg/front_end/testcases/inference/generic_methods_iterable_and_future.dart:31:108: Error: The argument type 'String Function(String, int)' can't be assigned to the parameter type 'FutureOr<String> Function(FutureOr<String>, int)'.
+//  - 'FutureOr' is from 'dart:async'.
+// Try changing the type of the parameter, or casting the argument to 'FutureOr<String> Function(FutureOr<String>, int)'.
+//                   /*info:INFERRED_TYPE_CLOSURE,error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ /*@returnType=String*/ (String
+//                                                                                                            ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart.strong.expect b/pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart.strong.expect
index f159ba8..5c42083 100644
--- a/pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart:26:62: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
@@ -14,8 +16,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   i = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::z*/ z;
 //                                                              ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart.strong.transformed.expect
index 3972ad0..5c42083 100644
--- a/pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart.strong.transformed.expect
@@ -1,4 +1,22 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart:26:62: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   s = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::y*/ y;
+//                                                              ^
+//
+// pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart:28:62: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   s = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::w*/ w;
+//                                                              ^
+//
+// pkg/front_end/testcases/inference/infer_correctly_on_multiple_variables_declared_together.dart:32:62: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   i = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::z*/ z;
+//                                                              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_field_override_multiple.dart.strong.expect b/pkg/front_end/testcases/inference/infer_field_override_multiple.dart.strong.expect
index 3f402e0..a48dc1a 100644
--- a/pkg/front_end/testcases/inference/infer_field_override_multiple.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_field_override_multiple.dart.strong.expect
@@ -1,116 +1,70 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:32:163: Error: Can't infer the type of 'x': overridden members must all have the same type.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:36:163: Error: Can't infer the type of 'x': overridden members must all have the same type.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:40:163: Error: Can't infer the type of 'x': overridden members must all have the same type.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:32:163: Error: The return type of the method 'F.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
-// Change to a subtype of 'int'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:9:11: Context: This is the overridden method ('x').
-//   int get x;
-//           ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:32:163: Error: The return type of the method 'F.x' is 'dynamic', which does not match the return type of the overridden method, 'num'.
-// Change to a subtype of 'num'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:17:11: Context: This is the overridden method ('x').
-//   num get x;
-//           ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:36:163: Error: The return type of the method 'G.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
-// Change to a subtype of 'int'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:9:11: Context: This is the overridden method ('x').
-//   int get x;
-//           ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:36:163: Error: The return type of the method 'G.x' is 'dynamic', which does not match the return type of the overridden method, 'double'.
-// Change to a subtype of 'double'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:21:14: Context: This is the overridden method ('x').
-//   double get x;
-//              ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:40:163: Error: The return type of the method 'H.x' is 'dynamic', which does not match the return type of the overridden method, 'num'.
-// Change to a subtype of 'num'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:17:11: Context: This is the overridden method ('x').
-//   num get x;
-//           ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:40:163: Error: The return type of the method 'H.x' is 'dynamic', which does not match the return type of the overridden method, 'double'.
-// Change to a subtype of 'double'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:21:14: Context: This is the overridden method ('x').
-//   double get x;
-//              ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:32:163: Error: Can't infer the type of 'x': overridden members must all have the same type.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:36:163: Error: Can't infer the type of 'x': overridden members must all have the same type.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:40:163: Error: Can't infer the type of 'x': overridden members must all have the same type.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:32:163: Error: The return type of the method 'F.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
-// Change to a subtype of 'int'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:32:163: Error: The return type of the method 'F.x' is 'dynamic', which does not match the return type of the overridden method, 'num'.
-// Change to a subtype of 'num'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:36:163: Error: The return type of the method 'G.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
-// Change to a subtype of 'int'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:36:163: Error: The return type of the method 'G.x' is 'dynamic', which does not match the return type of the overridden method, 'double'.
-// Change to a subtype of 'double'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:40:163: Error: The return type of the method 'H.x' is 'dynamic', which does not match the return type of the overridden method, 'num'.
-// Change to a subtype of 'num'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-//
-// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:40:163: Error: The return type of the method 'H.x' is 'dynamic', which does not match the return type of the overridden method, 'double'.
-// Change to a subtype of 'double'.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
-//                                                                                                                                                                   ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:32:163: Error: Can't infer the type of 'x': overridden members must all have the same type.
+// Specify the type explicitly.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
+//                                                                                                                                                                   ^
+//
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:36:163: Error: Can't infer the type of 'x': overridden members must all have the same type.
+// Specify the type explicitly.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
+//                                                                                                                                                                   ^
+//
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:40:163: Error: Can't infer the type of 'x': overridden members must all have the same type.
+// Specify the type explicitly.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
+//                                                                                                                                                                   ^
+//
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:32:163: Error: The return type of the method 'F.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
+// Change to a subtype of 'int'.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:9:11: Context: This is the overridden method ('x').
+//   int get x;
+//           ^
+//
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:32:163: Error: The return type of the method 'F.x' is 'dynamic', which does not match the return type of the overridden method, 'num'.
+// Change to a subtype of 'num'.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:17:11: Context: This is the overridden method ('x').
+//   num get x;
+//           ^
+//
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:36:163: Error: The return type of the method 'G.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
+// Change to a subtype of 'int'.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:9:11: Context: This is the overridden method ('x').
+//   int get x;
+//           ^
+//
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:36:163: Error: The return type of the method 'G.x' is 'dynamic', which does not match the return type of the overridden method, 'double'.
+// Change to a subtype of 'double'.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:21:14: Context: This is the overridden method ('x').
+//   double get x;
+//              ^
+//
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:40:163: Error: The return type of the method 'H.x' is 'dynamic', which does not match the return type of the overridden method, 'num'.
+// Change to a subtype of 'num'.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:17:11: Context: This is the overridden method ('x').
+//   num get x;
+//           ^
+//
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:40:163: Error: The return type of the method 'H.x' is 'dynamic', which does not match the return type of the overridden method, 'double'.
+// Change to a subtype of 'double'.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ /*@error=OverrideTypeMismatchReturnType*/ /*@error=OverrideTypeMismatchReturnType*/ x;
+//                                                                                                                                                                   ^
+// pkg/front_end/testcases/inference/infer_field_override_multiple.dart:21:14: Context: This is the overridden method ('x').
+//   double get x;
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.legacy.expect b/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.legacy.expect
index c1990f1..7ccc813 100644
--- a/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart:19:61: Warning: Getter not found: 'x'.
 // var /*@topType=B*/ b = new B(/*error:UNDEFINED_IDENTIFIER*/ x); // allocations
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart:21:34: Warning: Getter not found: 'x'.
 //   /*error:UNDEFINED_IDENTIFIER*/ x
 //                                  ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.legacy.transformed.expect
index 9c6ee49..7ccc813 100644
--- a/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.legacy.transformed.expect
@@ -1,4 +1,15 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart:19:61: Warning: Getter not found: 'x'.
+// var /*@topType=B*/ b = new B(/*error:UNDEFINED_IDENTIFIER*/ x); // allocations
+//                                                             ^
+//
+// pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart:21:34: Warning: Getter not found: 'x'.
+//   /*error:UNDEFINED_IDENTIFIER*/ x
+//                                  ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.strong.expect b/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.strong.expect
index 9075c6f..565c892 100644
--- a/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_from_complex_expressions_if_outer_most_value_is_precise.dart:19:61: Error: Getter not found: 'x'.
 // var /*@topType=B*/ b = new B(/*error:UNDEFINED_IDENTIFIER*/ x); // allocations
@@ -81,8 +83,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'B'.
 //   j = /*error:INVALID_ASSIGNMENT*/ /*@typeArgs=dynamic*/ [];
 //                                                          ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:collection" as col;
diff --git a/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart.strong.expect b/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart.strong.expect
index e47986c..634ead8 100644
--- a/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart:13:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -9,8 +11,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   y = /*error:INVALID_ASSIGNMENT*/ "hi";
 //                                    ^
-
-library test;
+//
 import self as self;
 import "./infer_from_variables_in_non_cycle_imports_with_flag_a.dart" as inf;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart.strong.transformed.expect
index bc3de58..634ead8 100644
--- a/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart.strong.transformed.expect
@@ -1,4 +1,17 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart:13:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   x = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                    ^
+//
+// pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag.dart:14:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   y = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                    ^
+//
 import self as self;
 import "./infer_from_variables_in_non_cycle_imports_with_flag_a.dart" as inf;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart.strong.expect b/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart.strong.expect
index 8ab19bb..4c6ed45 100644
--- a/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart:15:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -9,8 +11,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   B.y = /*error:INVALID_ASSIGNMENT*/ "hi";
 //                                      ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "./infer_from_variables_in_non_cycle_imports_with_flag2_a.dart" as inf;
diff --git a/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart.strong.transformed.expect
index 0f7d3b6..4c6ed45 100644
--- a/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart.strong.transformed.expect
@@ -1,4 +1,17 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart:15:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   A.x = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                      ^
+//
+// pkg/front_end/testcases/inference/infer_from_variables_in_non_cycle_imports_with_flag2.dart:16:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   B.y = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                      ^
+//
 import self as self;
 import "dart:core" as core;
 import "./infer_from_variables_in_non_cycle_imports_with_flag2_a.dart" as inf;
diff --git a/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.legacy.expect b/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.legacy.expect
index 45294a7..a11e748 100644
--- a/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:9:74: Warning: Method not found: 'g'.
 //   /*@returnType=dynamic*/ f() => /*error:REFERENCED_BEFORE_DECLARATION*/ g();
@@ -10,8 +12,7 @@
 // pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:9:74: Context: Previous use of 'g'.
 //   /*@returnType=dynamic*/ f() => /*error:REFERENCED_BEFORE_DECLARATION*/ g();
 //                                                                          ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.legacy.transformed.expect
index 9071805..a11e748 100644
--- a/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.legacy.transformed.expect
@@ -1,4 +1,18 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:9:74: Warning: Method not found: 'g'.
+//   /*@returnType=dynamic*/ f() => /*error:REFERENCED_BEFORE_DECLARATION*/ g();
+//                                                                          ^
+//
+// pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:14:3: Error: Can't declare 'g' because it was already used in this scope.
+//   g() => 0;
+//   ^
+// pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:9:74: Context: Previous use of 'g'.
+//   /*@returnType=dynamic*/ f() => /*error:REFERENCED_BEFORE_DECLARATION*/ g();
+//                                                                          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.strong.expect b/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.strong.expect
index 360c490..ed09f8b 100644
--- a/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:9:74: Error: Method not found: 'g'.
 //   /*@returnType=dynamic*/ f() => /*error:REFERENCED_BEFORE_DECLARATION*/ g();
@@ -10,8 +12,7 @@
 // pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:9:74: Context: Previous use of 'g'.
 //   /*@returnType=dynamic*/ f() => /*error:REFERENCED_BEFORE_DECLARATION*/ g();
 //                                                                          ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.strong.transformed.expect
index 7159770..ed09f8b 100644
--- a/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart.strong.transformed.expect
@@ -1,4 +1,18 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:9:74: Error: Method not found: 'g'.
+//   /*@returnType=dynamic*/ f() => /*error:REFERENCED_BEFORE_DECLARATION*/ g();
+//                                                                          ^
+//
+// pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:14:3: Error: Can't declare 'g' because it was already used in this scope.
+//   g() => 0;
+//   ^
+// pkg/front_end/testcases/inference/infer_local_function_referenced_before_declaration.dart:9:74: Context: Previous use of 'g'.
+//   /*@returnType=dynamic*/ f() => /*error:REFERENCED_BEFORE_DECLARATION*/ g();
+//                                                                          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_method_missing_params.dart.legacy.expect b/pkg/front_end/testcases/inference/infer_method_missing_params.dart.legacy.expect
index 8d85497..1738d37 100644
--- a/pkg/front_end/testcases/inference/infer_method_missing_params.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/infer_method_missing_params.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_method_missing_params.dart:23:61: Warning: The method 'C.f' has more required arguments than those of overridden method 'B.f'.
 //   /*@topType=int*/ /*@error=OverrideMoreRequiredArguments*/ f(
@@ -6,8 +8,7 @@
 // pkg/front_end/testcases/inference/infer_method_missing_params.dart:17:7: Context: This is the overridden method ('f').
 //   int f(int x);
 //       ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_method_missing_params.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/infer_method_missing_params.dart.legacy.transformed.expect
index ce0baed..1738d37 100644
--- a/pkg/front_end/testcases/inference/infer_method_missing_params.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_method_missing_params.dart.legacy.transformed.expect
@@ -1,4 +1,14 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_method_missing_params.dart:23:61: Warning: The method 'C.f' has more required arguments than those of overridden method 'B.f'.
+//   /*@topType=int*/ /*@error=OverrideMoreRequiredArguments*/ f(
+//                                                             ^
+// pkg/front_end/testcases/inference/infer_method_missing_params.dart:17:7: Context: This is the overridden method ('f').
+//   int f(int x);
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_method_missing_params.dart.outline.expect b/pkg/front_end/testcases/inference/infer_method_missing_params.dart.outline.expect
index 4768ea2..5e0625d 100644
--- a/pkg/front_end/testcases/inference/infer_method_missing_params.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/infer_method_missing_params.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_method_missing_params.dart:23:61: Warning: The method 'C.f' has more required arguments than those of overridden method 'B.f'.
 //   /*@topType=int*/ /*@error=OverrideMoreRequiredArguments*/ f(
@@ -6,8 +8,7 @@
 // pkg/front_end/testcases/inference/infer_method_missing_params.dart:17:7: Context: This is the overridden method ('f').
 //   int f(int x);
 //       ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_method_missing_params.dart.strong.expect b/pkg/front_end/testcases/inference/infer_method_missing_params.dart.strong.expect
index 24fae77..c73b3ed 100644
--- a/pkg/front_end/testcases/inference/infer_method_missing_params.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_method_missing_params.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_method_missing_params.dart:25:79: Error: Can't infer the type of 'y': overridden members must all have the same type.
 // Specify the type explicitly.
@@ -21,29 +23,7 @@
 // pkg/front_end/testcases/inference/infer_method_missing_params.dart:17:7: Context: This is the overridden method ('f').
 //   int f(int x);
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/infer_method_missing_params.dart:25:79: Error: Can't infer the type of 'y': overridden members must all have the same type.
-// Specify the type explicitly.
-//       /*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ y);
-//                                                                               ^
-//
-// pkg/front_end/testcases/inference/infer_method_missing_params.dart:29:80: Error: Can't infer the type of 'y': overridden members must all have the same type.
-// Specify the type explicitly.
-//       {/*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ y});
-//                                                                                ^
-//
-// pkg/front_end/testcases/inference/infer_method_missing_params.dart:27:80: Error: Can't infer the type of 'y': overridden members must all have the same type.
-// Specify the type explicitly.
-//       [/*@topType=dynamic*/ /*@error=CantInferTypeDueToInconsistentOverrides*/ y]);
-//                                                                                ^
-//
-// pkg/front_end/testcases/inference/infer_method_missing_params.dart:23:61: Error: The method 'C.f' has more required arguments than those of overridden method 'B.f'.
-//   /*@topType=int*/ /*@error=OverrideMoreRequiredArguments*/ f(
-//                                                             ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart.strong.expect b/pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart.strong.expect
index fbd3aab..38bb5e2 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart:17:69: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   String y = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::x*/ x;
 //                                                                     ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart.strong.transformed.expect
index 61b9117..38bb5e2 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_type_on_overridden_fields2.dart:17:69: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   String y = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::x*/ x;
+//                                                                     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart.strong.expect b/pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart.strong.expect
index 74cff0d..9e7b8a7 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart:17:69: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   String y = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::x*/ x;
 //                                                                     ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart.strong.transformed.expect
index 3bd82ef..9e7b8a7 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_type_on_overridden_fields4.dart:17:69: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   String y = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::x*/ x;
+//                                                                     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_var.dart.strong.expect b/pkg/front_end/testcases/inference/infer_type_on_var.dart.strong.expect
index 14b8127..de2349d 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_var.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_var.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_type_on_var.dart:10:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   x = /*error:INVALID_ASSIGNMENT*/ "hi";
 //                                    ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_var.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_type_on_var.dart.strong.transformed.expect
index a1f848e..de2349d 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_var.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_var.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_type_on_var.dart:10:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   x = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_var2.dart.strong.expect b/pkg/front_end/testcases/inference/infer_type_on_var2.dart.strong.expect
index dfcda1a..d986721 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_var2.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_var2.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_type_on_var2.dart:10:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   x = /*error:INVALID_ASSIGNMENT*/ "hi";
 //                                    ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_var2.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_type_on_var2.dart.strong.transformed.expect
index f7b38a9..d986721 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_var2.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_var2.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_type_on_var2.dart:10:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   x = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart.strong.expect b/pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart.strong.expect
index da23c2d..4ed1521 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart:13:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -14,8 +16,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //     c = /*error:INVALID_ASSIGNMENT*/ "hi";
 //                                      ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart.strong.transformed.expect
index 550faa1..4ed1521 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart.strong.transformed.expect
@@ -1,4 +1,22 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart:13:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     a = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                      ^
+//
+// pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart:16:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     b = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                      ^
+//
+// pkg/front_end/testcases/inference/infer_type_on_var_from_field.dart:19:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//     c = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                      ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.expect b/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.expect
index 552c53a..e3486c1 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart:12:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -14,8 +16,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   c = /*error:INVALID_ASSIGNMENT*/ "hi";
 //                                    ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.transformed.expect
index 129fcba..e3486c1 100644
--- a/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.transformed.expect
@@ -1,4 +1,22 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart:12:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   a = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                    ^
+//
+// pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart:15:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   b = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                    ^
+//
+// pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart:18:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   c = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart.strong.expect b/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart.strong.expect
index 1d5ecf9..b76781e 100644
--- a/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart:20:69: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   String z = /*error:INVALID_ASSIGNMENT*/ new C(). /*@target=C::x*/ x;
 //                                                                     ^
-
-library test;
+//
 import self as self;
 import "./infer_type_regardless_of_declaration_order_or_cycles_b.dart" as inf;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart.strong.transformed.expect
index 39f4588..b76781e 100644
--- a/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart:20:69: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   String z = /*error:INVALID_ASSIGNMENT*/ new C(). /*@target=C::x*/ x;
+//                                                                     ^
+//
 import self as self;
 import "./infer_type_regardless_of_declaration_order_or_cycles_b.dart" as inf;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles_b.dart.strong.expect b/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles_b.dart.strong.expect
index 5e99efe..8459af2 100644
--- a/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles_b.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles_b.dart.strong.expect
@@ -1,10 +1,3 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/infer_type_regardless_of_declaration_order_or_cycles.dart:20:69: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
-// Try changing the type of the left hand side, or casting the right hand side to 'String'.
-//   String z = /*error:INVALID_ASSIGNMENT*/ new C(). /*@target=C::x*/ x;
-//                                                                     ^
-
 library;
 import self as self;
 import "./infer_type_regardless_of_declaration_order_or_cycles.dart" as test;
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart.strong.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart.strong.expect
index 86d529f..2ac925a 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart:15:62: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -9,8 +11,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   String y = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::x*/ x;
 //                                                                     ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart.strong.transformed.expect
index f668981..2ac925a 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart.strong.transformed.expect
@@ -1,4 +1,17 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart:15:62: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   get /*@topType=int*/ w => /*error:RETURN_OF_INVALID_TYPE*/ "hello";
+//                                                              ^
+//
+// pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_3.dart:19:69: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   String y = /*error:INVALID_ASSIGNMENT*/ new B(). /*@target=B::x*/ x;
+//                                                                     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart.strong.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart.strong.expect
index 0fcc9ad..f6074a4 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart:18:74: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   int y = /*error:INVALID_ASSIGNMENT*/ new B<String>(). /*@target=B::x*/ x;
 //                                                                          ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart.strong.transformed.expect
index 52feedf..f6074a4 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_4.dart:18:74: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   int y = /*error:INVALID_ASSIGNMENT*/ new B<String>(). /*@target=B::x*/ x;
+//                                                                          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart.strong.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart.strong.expect
index eeb1a65..ea55404 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart:30:26: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //       . /*@target=B::m*/ m(null, null);
 //                          ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart.strong.transformed.expect
index 3f8ac59..ea55404 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_5.dart:30:26: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       . /*@target=B::m*/ m(null, null);
+//                          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart.strong.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart.strong.expect
index e65ce67..181a27e 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart:30:30: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //       . /*@target=A::value*/ value;
 //                              ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "./infer_types_on_generic_instantiations_in_library_cycle_a.dart" as inf;
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart.strong.transformed.expect
index d770c53..181a27e 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart:30:30: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       . /*@target=A::value*/ value;
+//                              ^
+//
 import self as self;
 import "dart:core" as core;
 import "./infer_types_on_generic_instantiations_in_library_cycle_a.dart" as inf;
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle_a.dart.strong.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle_a.dart.strong.expect
index 314ae7f..999c28e 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle_a.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle_a.dart.strong.expect
@@ -1,10 +1,3 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_in_library_cycle.dart:30:30: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
-// Try changing the type of the left hand side, or casting the right hand side to 'int'.
-//       . /*@target=A::value*/ value;
-//                              ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_infer.dart.strong.expect b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_infer.dart.strong.expect
index 2583a3f..a901909 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_infer.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_infer.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_infer.dart:13:49: Error: The return type of the method 'B.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
 // Change to a subtype of 'int'.
@@ -7,15 +9,7 @@
 // pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_infer.dart:9:11: Context: This is the overridden method ('x').
 //   final T x = null;
 //           ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/infer_types_on_generic_instantiations_infer.dart:13:49: Error: The return type of the method 'B.x' is 'dynamic', which does not match the return type of the overridden method, 'int'.
-// Change to a subtype of 'int'.
-//   /*error:INVALID_METHOD_OVERRIDE*/ dynamic get x => 3;
-//                                                 ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart.strong.expect b/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart.strong.expect
index 2adcee0..d7b891f 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart:15:44: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -28,8 +30,7 @@
 //  - 'Iterable' is from 'dart:core'.
 //   for (var /*@type=dynamic*/ x in /*error:FOR_IN_OF_INVALID_TYPE*/ map) {
 //                                                                    ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart.strong.transformed.expect
index b0fe058..d7b891f 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart.strong.transformed.expect
@@ -1,4 +1,36 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart:15:44: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       int x = /*error:INVALID_ASSIGNMENT*/ i;
+//                                            ^
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart:23:44: Error: A value of type 'T' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       int x = /*error:INVALID_ASSIGNMENT*/ i;
+//                                            ^
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart:32:45: Error: A value of type 'Foo' can't be assigned to a variable of type 'String'.
+//  - 'Foo' is from 'pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//     String y = /*error:INVALID_ASSIGNMENT*/ x;
+//                                             ^
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart:39:15: Error: A value of type 'Foo' can't be assigned to a variable of type 'String'.
+//  - 'Foo' is from 'pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart'.
+// Try changing the type of the variable.
+//   for (String x in /*error:FOR_IN_OF_INVALID_ELEMENT_TYPE*/ list) {
+//               ^
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart:60:68: Error: The type 'Map<String, Foo>' used in the 'for' loop must implement 'Iterable<dynamic>'.
+//  - 'Map' is from 'dart:core'.
+//  - 'Foo' is from 'pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop.dart'.
+//  - 'Iterable' is from 'dart:core'.
+//   for (var /*@type=dynamic*/ x in /*error:FOR_IN_OF_INVALID_TYPE*/ map) {
+//                                                                    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart.strong.expect b/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart.strong.expect
index 2a2bfbc..d1801f7 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart:17:44: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -28,8 +30,7 @@
 //  - 'Stream' is from 'dart:async'.
 //   await for (var /*@type=dynamic*/ x in /*error:FOR_IN_OF_INVALID_TYPE*/ map) {
 //                                                                          ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart.strong.transformed.expect
index d01610c..b075c03 100644
--- a/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart.strong.transformed.expect
@@ -1,4 +1,36 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart:17:44: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       int x = /*error:INVALID_ASSIGNMENT*/ i;
+//                                            ^
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart:25:44: Error: A value of type 'T' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       int x = /*error:INVALID_ASSIGNMENT*/ i;
+//                                            ^
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart:38:45: Error: A value of type 'Foo' can't be assigned to a variable of type 'String'.
+//  - 'Foo' is from 'pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//     String y = /*error:INVALID_ASSIGNMENT*/ x;
+//                                             ^
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart:45:21: Error: A value of type 'Foo' can't be assigned to a variable of type 'String'.
+//  - 'Foo' is from 'pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart'.
+// Try changing the type of the variable.
+//   await for (String x in /*error:FOR_IN_OF_INVALID_ELEMENT_TYPE*/ myStream) {
+//                     ^
+//
+// pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart:66:74: Error: The type 'Map<String, Foo>' used in the 'for' loop must implement 'Stream<dynamic>'.
+//  - 'Map' is from 'dart:core'.
+//  - 'Foo' is from 'pkg/front_end/testcases/inference/infer_types_on_loop_indices_for_each_loop_async.dart'.
+//  - 'Stream' is from 'dart:async'.
+//   await for (var /*@type=dynamic*/ x in /*error:FOR_IN_OF_INVALID_TYPE*/ map) {
+//                                                                          ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart.strong.expect b/pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart.strong.expect
index 3918cc1..b340fe0 100644
--- a/pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart:10:46: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   Foo([this.x = /*error:INVALID_ASSIGNMENT*/ "1"]);
 //                                              ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart.strong.transformed.expect
index a634ff2..b340fe0 100644
--- a/pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/inferred_initializing_formal_checks_default_value.dart:10:46: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   Foo([this.x = /*error:INVALID_ASSIGNMENT*/ "1"]);
+//                                              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/instantiate_tearoff_of_call.dart.strong.expect b/pkg/front_end/testcases/inference/instantiate_tearoff_of_call.dart.strong.expect
index 4c1044d..68e9b92 100644
--- a/pkg/front_end/testcases/inference/instantiate_tearoff_of_call.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/instantiate_tearoff_of_call.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/instantiate_tearoff_of_call.dart:10:12: Error: A value of type 'T Function<T>(T)' can't be assigned to a variable of type 'int Function(int)'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int Function(int)'.
 //   func = f.call;
 //            ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/list_literals.dart.strong.expect b/pkg/front_end/testcases/inference/list_literals.dart.strong.expect
index a6e5a15..219a1ea 100644
--- a/pkg/front_end/testcases/inference/list_literals.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/list_literals.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/list_literals.dart:10:71: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
 // Try changing the type of the parameter, or casting the argument to 'int'.
@@ -14,8 +16,7 @@
 // Try changing the type of the parameter, or casting the argument to 'num'.
 //   x. /*@target=List::add*/ add(/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi');
 //                                                                       ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/list_literals.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/list_literals.dart.strong.transformed.expect
index b8c82a7..219a1ea 100644
--- a/pkg/front_end/testcases/inference/list_literals.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/list_literals.dart.strong.transformed.expect
@@ -1,4 +1,22 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/list_literals.dart:10:71: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//   x. /*@target=List::add*/ add(/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi');
+//                                                                       ^
+//
+// pkg/front_end/testcases/inference/list_literals.dart:11:71: Error: The argument type 'double' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//   x. /*@target=List::add*/ add(/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 4.0);
+//                                                                       ^
+//
+// pkg/front_end/testcases/inference/list_literals.dart:18:71: Error: The argument type 'String' can't be assigned to the parameter type 'num'.
+// Try changing the type of the parameter, or casting the argument to 'num'.
+//   x. /*@target=List::add*/ add(/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi');
+//                                                                       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/list_literals_top_level.dart.strong.expect b/pkg/front_end/testcases/inference/list_literals_top_level.dart.strong.expect
index e251619..763b151 100644
--- a/pkg/front_end/testcases/inference/list_literals_top_level.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/list_literals_top_level.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/list_literals_top_level.dart:10:72: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
 // Try changing the type of the parameter, or casting the argument to 'int'.
@@ -14,8 +16,7 @@
 // Try changing the type of the parameter, or casting the argument to 'num'.
 //   x2. /*@target=List::add*/ add(/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi');
 //                                                                        ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/list_literals_top_level.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/list_literals_top_level.dart.strong.transformed.expect
index 1079583..763b151 100644
--- a/pkg/front_end/testcases/inference/list_literals_top_level.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/list_literals_top_level.dart.strong.transformed.expect
@@ -1,4 +1,22 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/list_literals_top_level.dart:10:72: Error: The argument type 'String' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//   x1. /*@target=List::add*/ add(/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi');
+//                                                                        ^
+//
+// pkg/front_end/testcases/inference/list_literals_top_level.dart:11:72: Error: The argument type 'double' can't be assigned to the parameter type 'int'.
+// Try changing the type of the parameter, or casting the argument to 'int'.
+//   x1. /*@target=List::add*/ add(/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 4.0);
+//                                                                        ^
+//
+// pkg/front_end/testcases/inference/list_literals_top_level.dart:18:72: Error: The argument type 'String' can't be assigned to the parameter type 'num'.
+// Try changing the type of the parameter, or casting the argument to 'num'.
+//   x2. /*@target=List::add*/ add(/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi');
+//                                                                        ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/local_return_and_yield.dart.strong.expect b/pkg/front_end/testcases/inference/local_return_and_yield.dart.strong.expect
index 056c9cb..49fdc28 100644
--- a/pkg/front_end/testcases/inference/local_return_and_yield.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/local_return_and_yield.dart.strong.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/local_return_and_yield.dart:19:36: Error: A value of type 'dynamic Function(dynamic)' can't be assigned to a variable of type 'FutureOr<int Function(int)>'.
 //  - 'FutureOr' is from 'dart:async'.
 // Try changing the type of the left hand side, or casting the right hand side to 'FutureOr<int Function(int)>'.
 //     return /*@returnType=dynamic*/ (/*@type=dynamic*/ x) => x;
 //                                    ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/local_return_and_yield.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/local_return_and_yield.dart.strong.transformed.expect
index bba0bec..c20f7cd 100644
--- a/pkg/front_end/testcases/inference/local_return_and_yield.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/local_return_and_yield.dart.strong.transformed.expect
@@ -1,4 +1,13 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/local_return_and_yield.dart:19:36: Error: A value of type 'dynamic Function(dynamic)' can't be assigned to a variable of type 'FutureOr<int Function(int)>'.
+//  - 'FutureOr' is from 'dart:async'.
+// Try changing the type of the left hand side, or casting the right hand side to 'FutureOr<int Function(int)>'.
+//     return /*@returnType=dynamic*/ (/*@type=dynamic*/ x) => x;
+//                                    ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/map_literals.dart.strong.expect b/pkg/front_end/testcases/inference/map_literals.dart.strong.expect
index bed99dc..7b89247 100644
--- a/pkg/front_end/testcases/inference/map_literals.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/map_literals.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/map_literals.dart:12:46: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -25,8 +27,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'Pattern'.
 //   x /*@target=Map::[]=*/ [3] = /*error:INVALID_ASSIGNMENT*/ 42;
 //                                                             ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/map_literals.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/map_literals.dart.strong.transformed.expect
index 8ecf212..7b89247 100644
--- a/pkg/front_end/testcases/inference/map_literals.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/map_literals.dart.strong.transformed.expect
@@ -1,4 +1,33 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/map_literals.dart:12:46: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi'] = 'w';
+//                                              ^
+//
+// pkg/front_end/testcases/inference/map_literals.dart:14:46: Error: A value of type 'double' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//       /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 4.0] = 'u';
+//                                              ^
+//
+// pkg/front_end/testcases/inference/map_literals.dart:15:61: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   x /*@target=Map::[]=*/ [3] = /*error:INVALID_ASSIGNMENT*/ 42;
+//                                                             ^
+//
+// pkg/front_end/testcases/inference/map_literals.dart:27:46: Error: A value of type 'String' can't be assigned to a variable of type 'num'.
+// Try changing the type of the left hand side, or casting the right hand side to 'num'.
+//       /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi'] = 'w';
+//                                              ^
+//
+// pkg/front_end/testcases/inference/map_literals.dart:29:61: Error: A value of type 'int' can't be assigned to a variable of type 'Pattern'.
+//  - 'Pattern' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'Pattern'.
+//   x /*@target=Map::[]=*/ [3] = /*error:INVALID_ASSIGNMENT*/ 42;
+//                                                             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/map_literals_top_level.dart.strong.expect b/pkg/front_end/testcases/inference/map_literals_top_level.dart.strong.expect
index ee5e9fd..29bcc2c 100644
--- a/pkg/front_end/testcases/inference/map_literals_top_level.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/map_literals_top_level.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/map_literals_top_level.dart:14:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -25,8 +27,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'Pattern'.
 //   x2 /*@target=Map::[]=*/ [3] = /*error:INVALID_ASSIGNMENT*/ 42;
 //                                                              ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/map_literals_top_level.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/map_literals_top_level.dart.strong.transformed.expect
index ffd8868..29bcc2c 100644
--- a/pkg/front_end/testcases/inference/map_literals_top_level.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/map_literals_top_level.dart.strong.transformed.expect
@@ -1,4 +1,33 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/map_literals_top_level.dart:14:67: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   x1 /*@target=Map::[]=*/ [/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi'] = 'w';
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/map_literals_top_level.dart:15:67: Error: A value of type 'double' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   x1 /*@target=Map::[]=*/ [/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 4.0] = 'u';
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/map_literals_top_level.dart:16:62: Error: A value of type 'int' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   x1 /*@target=Map::[]=*/ [3] = /*error:INVALID_ASSIGNMENT*/ 42;
+//                                                              ^
+//
+// pkg/front_end/testcases/inference/map_literals_top_level.dart:27:67: Error: A value of type 'String' can't be assigned to a variable of type 'num'.
+// Try changing the type of the left hand side, or casting the right hand side to 'num'.
+//   x2 /*@target=Map::[]=*/ [/*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ 'hi'] = 'w';
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference/map_literals_top_level.dart:29:62: Error: A value of type 'int' can't be assigned to a variable of type 'Pattern'.
+//  - 'Pattern' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'Pattern'.
+//   x2 /*@target=Map::[]=*/ [3] = /*error:INVALID_ASSIGNMENT*/ 42;
+//                                                              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.legacy.expect
index 68141d0..ad7e505 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart:12:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart'.
@@ -9,19 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart'.
 // class A extends M1 with M0 {}
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart:12:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart'.
-// class A extends M1 with M0 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart:12:7: Error: 'A' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart'.
-// class A extends M1 with M0 {}
-//       ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.legacy.transformed.expect
index d53ce70..d6d20e8 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart:12:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart'.
 // class A extends M1 with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.outline.expect
index 47cf040..153cf0f 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart:12:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_1.dart'.
 // class A extends M1 with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.legacy.expect
index b7e2c17..2bf8871 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart:12:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart'.
@@ -9,19 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart'.
 // class A extends M1 with M0 {}
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart:12:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart'.
-// class A extends M1 with M0 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart:12:7: Error: 'A' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart'.
-// class A extends M1 with M0 {}
-//       ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.legacy.transformed.expect
index 353900f..95a03e7 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart:12:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart'.
 // class A extends M1 with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.outline.expect
index 490e127f..aa64264 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart:12:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_2.dart'.
 // class A extends M1 with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.legacy.expect
index 751f33d..4b75804 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:13:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart'.
@@ -9,19 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart'.
 // class A extends M1 with M0 {}
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:13:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart'.
-// class A extends M1 with M0 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:13:7: Error: 'A' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart'.
-// class A extends M1 with M0 {}
-//       ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.legacy.transformed.expect
index e98e8f6..9669075 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:13:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart'.
 // class A extends M1 with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.outline.expect
index 9ec413d..e967a16 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:13:7: Error: 'M1 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart'.
 // class A extends M1 with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.strong.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.strong.expect
index 7d0cb03..78b8e48 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:13:7: Error: Type argument 'Comparable<dynamic>' doesn't conform to the bound 'Comparable<Y>' of the type variable 'Y' on 'M0' in the supertype 'M0' of class 'M1 with M0'.
 //  - 'Comparable' is from 'dart:core'.
@@ -8,16 +10,7 @@
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:7:13: Context: This is the type variable whose bound isn't conformed to.
 // class M0<X, Y extends Comparable<Y>> extends I<X> {}
 //             ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:13:7: Error: Type argument 'Comparable<dynamic>' doesn't conform to the bound 'Comparable<Y>' of the type variable 'Y' on 'M0' in the supertype 'M0' of class 'M1 with M0'.
-//  - 'Comparable' is from 'dart:core'.
-// Try changing type arguments so that they conform to the bounds.
-// class A extends M1 with M0 {}
-//       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.strong.transformed.expect
index fe9fd8d..cecd07c 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart.strong.transformed.expect
@@ -1,12 +1,16 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:13:7: Error: Type argument 'Comparable<dynamic>' doesn't conform to the bound 'Comparable<Y>' of the type variable 'Y' on 'M0' in the supertype 'M0' of class 'M1 with M0'.
 //  - 'Comparable' is from 'dart:core'.
 // Try changing type arguments so that they conform to the bounds.
 // class A extends M1 with M0 {}
 //       ^
-
-library;
+// pkg/front_end/testcases/inference/mixin_inference_instantiate_to_bounds_3.dart:7:13: Context: This is the type variable whose bound isn't conformed to.
+// class M0<X, Y extends Comparable<Y>> extends I<X> {}
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.legacy.expect
index 1066a51..3cc474f 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart:16:7: Error: 'M2 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
@@ -19,29 +20,7 @@
 //  - 'J' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
 // class A extends M2 with M0 {}
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart:16:7: Error: 'M2 with M0' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
-// class A extends M2 with M0 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart:16:7: Error: 'M2 with M0' can't implement both 'J<double>' and 'J<dynamic>'
-//  - 'J' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
-// class A extends M2 with M0 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart:16:7: Error: 'A' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
-// class A extends M2 with M0 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart:16:7: Error: 'A' can't implement both 'J<double>' and 'J<dynamic>'
-//  - 'J' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
-// class A extends M2 with M0 {}
-//       ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.legacy.transformed.expect
index ed90883..435c5eb 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart:16:7: Error: 'M2 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
@@ -19,7 +20,7 @@
 //  - 'J' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
 // class A extends M2 with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.outline.expect
index d265daa..d7d23fd 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart:16:7: Error: 'M2 with M0' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
@@ -19,7 +20,7 @@
 //  - 'J' is from 'pkg/front_end/testcases/inference/mixin_inference_multiple_constraints.dart'.
 // class A extends M2 with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.legacy.expect
index 1886407..9c7c097 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart:14:7: Error: 'M2 with M0' can't implement both 'I<List<Map<int, int>>>' and 'I<List<dynamic>>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart'.
@@ -13,23 +14,7 @@
 //  - 'Map' is from 'dart:core'.
 // class A extends M2<int> with M0 {}
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart:14:7: Error: 'M2 with M0' can't implement both 'I<List<Map<int, int>>>' and 'I<List<dynamic>>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart'.
-//  - 'List' is from 'dart:core'.
-//  - 'Map' is from 'dart:core'.
-// class A extends M2<int> with M0 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart:14:7: Error: 'A' can't implement both 'I<List<Map<int, int>>>' and 'I<List<dynamic>>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart'.
-//  - 'List' is from 'dart:core'.
-//  - 'Map' is from 'dart:core'.
-// class A extends M2<int> with M0 {}
-//       ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.legacy.transformed.expect
index 41fb098..25112ed 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart:14:7: Error: 'M2 with M0' can't implement both 'I<List<Map<int, int>>>' and 'I<List<dynamic>>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart'.
@@ -13,7 +14,7 @@
 //  - 'Map' is from 'dart:core'.
 // class A extends M2<int> with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.outline.expect
index 8a0d0f9..07edfca 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart:14:7: Error: 'M2 with M0' can't implement both 'I<List<Map<int, int>>>' and 'I<List<dynamic>>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_non_trivial_constraints.dart'.
@@ -13,7 +14,7 @@
 //  - 'Map' is from 'dart:core'.
 // class A extends M2<int> with M0 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.legacy.expect
index bf40fc9..f6ebbf5 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart:12:7: Error: 'M0 with M1' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart'.
@@ -9,19 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart'.
 // class A extends M0<int> with M1 {}
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart:12:7: Error: 'M0 with M1' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart'.
-// class A extends M0<int> with M1 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart:12:7: Error: 'A' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart'.
-// class A extends M0<int> with M1 {}
-//       ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.legacy.transformed.expect
index 7a1c8c2..79b10e7 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart:12:7: Error: 'M0 with M1' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart'.
 // class A extends M0<int> with M1 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.outline.expect
index 3378125..fcde3b5 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart:12:7: Error: 'M0 with M1' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_1.dart'.
 // class A extends M0<int> with M1 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.legacy.expect
index 231fbf6d..3afefb6 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart:15:7: Error: 'M0 with M1' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart'.
@@ -14,24 +15,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart'.
 // class A extends M0<int> with M1, M2 {}
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart:15:7: Error: 'M0 with M1' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart'.
-// class A extends M0<int> with M1, M2 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart:15:7: Error: 'M0 with M1, M2' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart'.
-// class A extends M0<int> with M1, M2 {}
-//       ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart:15:7: Error: 'A' can't implement both 'I<int>' and 'I<dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart'.
-// class A extends M0<int> with M1, M2 {}
-//       ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.legacy.transformed.expect
index 6079249..19803cd 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart:15:7: Error: 'M0 with M1' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart'.
@@ -14,7 +15,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart'.
 // class A extends M0<int> with M1, M2 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.outline.expect
index 491fd65..2f5c367 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart:15:7: Error: 'M0 with M1' can't implement both 'I<int>' and 'I<dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart'.
@@ -14,7 +15,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_2.dart'.
 // class A extends M0<int> with M1, M2 {}
 //       ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.legacy.expect
index 397be08..890adf5 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic>' and 'I<int>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
@@ -9,19 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic>' and 'I<int>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart:15:69: Error: 'A' can't implement both 'I<dynamic>' and 'I<int>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.legacy.transformed.expect
index 2c73250..2b7b8f2 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic>' and 'I<int>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.outline.expect
index 51eab20..6452cea 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic>' and 'I<int>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.strong.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.strong.expect
index 397be08..890adf5 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart.strong.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic>' and 'I<int>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
@@ -9,19 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic>' and 'I<int>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart:15:69: Error: 'A' can't implement both 'I<dynamic>' and 'I<int>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_3.dart'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.legacy.expect
index 31db2ea..fb172cf 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.legacy.expect
@@ -1,17 +1,11 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart:16:38: Error: 'A' can't implement both 'I<dynamic>' and 'I<int>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart'.
 // class /*@error=AmbiguousSupertypes*/ A extends Object
 //                                      ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart:16:38: Error: 'A' can't implement both 'I<dynamic>' and 'I<int>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart'.
-// class /*@error=AmbiguousSupertypes*/ A extends Object
-//                                      ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.legacy.transformed.expect
index 6042159..17ece57 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart:16:38: Error: 'A' can't implement both 'I<dynamic>' and 'I<int>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart'.
 // class /*@error=AmbiguousSupertypes*/ A extends Object
 //                                      ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.outline.expect
index b9461de..bae1a11 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart:16:38: Error: 'A' can't implement both 'I<dynamic>' and 'I<int>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart'.
 // class /*@error=AmbiguousSupertypes*/ A extends Object
 //                                      ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.strong.expect b/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.strong.expect
index 31db2ea..fb172cf 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart.strong.expect
@@ -1,17 +1,11 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart:16:38: Error: 'A' can't implement both 'I<dynamic>' and 'I<int>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart'.
 // class /*@error=AmbiguousSupertypes*/ A extends Object
 //                                      ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart:16:38: Error: 'A' can't implement both 'I<dynamic>' and 'I<int>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_outwards_4.dart'.
-// class /*@error=AmbiguousSupertypes*/ A extends Object
-//                                      ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.legacy.expect
index 7583b60..a776b09 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_unification_1.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, int>' and 'I<String, dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
@@ -9,19 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_unification_1.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, int>' and 'I<String, dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_unification_1.dart:15:69: Error: 'A' can't implement both 'I<dynamic, int>' and 'I<String, dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.legacy.transformed.expect
index 30ac8b5..06aab2c 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_unification_1.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, int>' and 'I<String, dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.outline.expect
index 365b0b9..ab6dd91 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_unification_1.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, int>' and 'I<String, dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
@@ -9,7 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.strong.expect b/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.strong.expect
index 7583b60..a776b09 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_unification_1.dart.strong.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_unification_1.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, int>' and 'I<String, dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
@@ -9,19 +10,7 @@
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_unification_1.dart:15:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, int>' and 'I<String, dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_unification_1.dart:15:69: Error: 'A' can't implement both 'I<dynamic, int>' and 'I<String, dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_1.dart'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.legacy.expect b/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.legacy.expect
index 2da56f2..6e2e1ab7 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.legacy.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_unification_2.dart:19:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, List<dynamic>>' and 'I<List<dynamic>, dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_2.dart'.
@@ -11,21 +12,7 @@
 //  - 'List' is from 'dart:core'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_unification_2.dart:19:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, List<dynamic>>' and 'I<List<dynamic>, dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_2.dart'.
-//  - 'List' is from 'dart:core'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_unification_2.dart:19:69: Error: 'A' can't implement both 'I<dynamic, List<dynamic>>' and 'I<List<dynamic>, dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_2.dart'.
-//  - 'List' is from 'dart:core'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.legacy.transformed.expect
index 04b8a12..da13f1a 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.legacy.transformed.expect
@@ -1,4 +1,5 @@
-// Unhandled errors:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_unification_2.dart:19:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, List<dynamic>>' and 'I<List<dynamic>, dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_2.dart'.
@@ -11,7 +12,7 @@
 //  - 'List' is from 'dart:core'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.outline.expect b/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.outline.expect
index 738f378..1e1142a 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.outline.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_unification_2.dart:19:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, List<dynamic>>' and 'I<List<dynamic>, dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_2.dart'.
@@ -11,7 +12,7 @@
 //  - 'List' is from 'dart:core'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
+//
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.strong.expect b/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.strong.expect
index 2da56f2..6e2e1ab7 100644
--- a/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/mixin_inference_unification_2.dart.strong.expect
@@ -1,4 +1,5 @@
-// Formatted problems:
+//
+// Problems in component:
 //
 // pkg/front_end/testcases/inference/mixin_inference_unification_2.dart:19:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, List<dynamic>>' and 'I<List<dynamic>, dynamic>'
 //  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_2.dart'.
@@ -11,21 +12,7 @@
 //  - 'List' is from 'dart:core'.
 // class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
 //                                                                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference/mixin_inference_unification_2.dart:19:69: Error: 'Object with M0, M1' can't implement both 'I<dynamic, List<dynamic>>' and 'I<List<dynamic>, dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_2.dart'.
-//  - 'List' is from 'dart:core'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference/mixin_inference_unification_2.dart:19:69: Error: 'A' can't implement both 'I<dynamic, List<dynamic>>' and 'I<List<dynamic>, dynamic>'
-//  - 'I' is from 'pkg/front_end/testcases/inference/mixin_inference_unification_2.dart'.
-//  - 'List' is from 'dart:core'.
-// class /*@error=AmbiguousSupertypes*/ /*@error=AmbiguousSupertypes*/ A
-//                                                                     ^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference/propagate_inference_transitively.dart.strong.expect b/pkg/front_end/testcases/inference/propagate_inference_transitively.dart.strong.expect
index d448f5a7..58c7f14 100644
--- a/pkg/front_end/testcases/inference/propagate_inference_transitively.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/propagate_inference_transitively.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/propagate_inference_transitively.dart:14:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -9,8 +11,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   a2. /*@target=A::x*/ x = /*error:INVALID_ASSIGNMENT*/ "hi";
 //                                                         ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/propagate_inference_transitively.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/propagate_inference_transitively.dart.strong.transformed.expect
index 275dfa6..58c7f14 100644
--- a/pkg/front_end/testcases/inference/propagate_inference_transitively.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/propagate_inference_transitively.dart.strong.transformed.expect
@@ -1,4 +1,17 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/propagate_inference_transitively.dart:14:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   a1. /*@target=A::x*/ x = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                                         ^
+//
+// pkg/front_end/testcases/inference/propagate_inference_transitively.dart:17:57: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   a2. /*@target=A::x*/ x = /*error:INVALID_ASSIGNMENT*/ "hi";
+//                                                         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/property_set_bad_setter.dart.legacy.expect b/pkg/front_end/testcases/inference/property_set_bad_setter.dart.legacy.expect
index 8eced30..a0997b0 100644
--- a/pkg/front_end/testcases/inference/property_set_bad_setter.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/property_set_bad_setter.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/property_set_bad_setter.dart:9:13: Error: A setter should have exactly one formal parameter.
 //   void set x() {}
 //             ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/property_set_bad_setter.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/property_set_bad_setter.dart.legacy.transformed.expect
index 55e2dc6..a0997b0 100644
--- a/pkg/front_end/testcases/inference/property_set_bad_setter.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/property_set_bad_setter.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/property_set_bad_setter.dart:9:13: Error: A setter should have exactly one formal parameter.
+//   void set x() {}
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/property_set_bad_setter.dart.strong.expect b/pkg/front_end/testcases/inference/property_set_bad_setter.dart.strong.expect
index b0a4fa1..3d09e75 100644
--- a/pkg/front_end/testcases/inference/property_set_bad_setter.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/property_set_bad_setter.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/property_set_bad_setter.dart:9:13: Error: A setter should have exactly one formal parameter.
 //   void set x() {}
 //             ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/property_set_bad_setter.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/property_set_bad_setter.dart.strong.transformed.expect
index 710fdf3..3d09e75 100644
--- a/pkg/front_end/testcases/inference/property_set_bad_setter.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/property_set_bad_setter.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/property_set_bad_setter.dart:9:13: Error: A setter should have exactly one formal parameter.
+//   void set x() {}
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/top_level_return_and_yield.dart.strong.expect b/pkg/front_end/testcases/inference/top_level_return_and_yield.dart.strong.expect
index 4fced41..b499ab1 100644
--- a/pkg/front_end/testcases/inference/top_level_return_and_yield.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/top_level_return_and_yield.dart.strong.expect
@@ -1,12 +1,13 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/top_level_return_and_yield.dart:18:34: Error: A value of type 'dynamic Function(dynamic)' can't be assigned to a variable of type 'FutureOr<int Function(int)>'.
 //  - 'FutureOr' is from 'dart:async'.
 // Try changing the type of the left hand side, or casting the right hand side to 'FutureOr<int Function(int)>'.
 //   return /*@returnType=dynamic*/ (/*@type=dynamic*/ x) => x;
 //                                  ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/top_level_return_and_yield.dart.strong.transformed.expect b/pkg/front_end/testcases/inference/top_level_return_and_yield.dart.strong.transformed.expect
index ae67a0b..9d82be1 100644
--- a/pkg/front_end/testcases/inference/top_level_return_and_yield.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference/top_level_return_and_yield.dart.strong.transformed.expect
@@ -1,4 +1,13 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/top_level_return_and_yield.dart:18:34: Error: A value of type 'dynamic Function(dynamic)' can't be assigned to a variable of type 'FutureOr<int Function(int)>'.
+//  - 'FutureOr' is from 'dart:async'.
+// Try changing the type of the left hand side, or casting the right hand side to 'FutureOr<int Function(int)>'.
+//   return /*@returnType=dynamic*/ (/*@type=dynamic*/ x) => x;
+//                                  ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference/unresolved_super.dart.legacy.expect b/pkg/front_end/testcases/inference/unresolved_super.dart.legacy.expect
index fafdf1d..e054d56 100644
--- a/pkg/front_end/testcases/inference/unresolved_super.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/unresolved_super.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/unresolved_super.dart:12:38: Warning: Superclass has no method named 'foo'.
 //     var /*@type=dynamic*/ v1 = super.foo(/*@typeArgs=dynamic*/ f());
@@ -19,8 +21,7 @@
 // pkg/front_end/testcases/inference/unresolved_super.dart:16:37: Warning: Superclass has no method named '[]='.
 //     var /*@type=dynamic*/ v5 = super[0] = /*@typeArgs=dynamic*/ f();
 //                                     ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/unresolved_super.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/unresolved_super.dart.legacy.transformed.expect
index 50d794f..e054d56 100644
--- a/pkg/front_end/testcases/inference/unresolved_super.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/unresolved_super.dart.legacy.transformed.expect
@@ -1,4 +1,27 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:12:38: Warning: Superclass has no method named 'foo'.
+//     var /*@type=dynamic*/ v1 = super.foo(/*@typeArgs=dynamic*/ f());
+//                                      ^^^
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:13:38: Warning: Superclass has no getter named 'bar'.
+//     var /*@type=dynamic*/ v2 = super.bar;
+//                                      ^^^
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:14:37: Warning: Superclass has no method named '[]'.
+//     var /*@type=dynamic*/ v3 = super[0];
+//                                     ^
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:15:38: Warning: Superclass has no setter named 'bar'.
+//     var /*@type=dynamic*/ v4 = super.bar = /*@typeArgs=dynamic*/ f();
+//                                      ^^^
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:16:37: Warning: Superclass has no method named '[]='.
+//     var /*@type=dynamic*/ v5 = super[0] = /*@typeArgs=dynamic*/ f();
+//                                     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/unresolved_super.dart.strong.expect b/pkg/front_end/testcases/inference/unresolved_super.dart.strong.expect
index d8ed4e6..eeae7d5 100644
--- a/pkg/front_end/testcases/inference/unresolved_super.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/unresolved_super.dart.strong.expect
@@ -1,48 +1,27 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:12:38: Error: Superclass has no method named 'foo'.
-//     var /*@type=dynamic*/ v1 = super.foo(/*@typeArgs=dynamic*/ f());
-//                                      ^^^
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:13:38: Error: Superclass has no getter named 'bar'.
-//     var /*@type=dynamic*/ v2 = super.bar;
-//                                      ^^^
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:14:37: Error: Superclass has no method named '[]'.
-//     var /*@type=dynamic*/ v3 = super[0];
-//                                     ^
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:15:38: Error: Superclass has no setter named 'bar'.
-//     var /*@type=dynamic*/ v4 = super.bar = /*@typeArgs=dynamic*/ f();
-//                                      ^^^
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:16:37: Error: Superclass has no method named '[]='.
-//     var /*@type=dynamic*/ v5 = super[0] = /*@typeArgs=dynamic*/ f();
-//                                     ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:12:38: Error: Superclass has no method named 'foo'.
-//     var /*@type=dynamic*/ v1 = super.foo(/*@typeArgs=dynamic*/ f());
-//                                      ^^^
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:13:38: Error: Superclass has no getter named 'bar'.
-//     var /*@type=dynamic*/ v2 = super.bar;
-//                                      ^^^
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:14:37: Error: Superclass has no method named '[]'.
-//     var /*@type=dynamic*/ v3 = super[0];
-//                                     ^
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:15:38: Error: Superclass has no setter named 'bar'.
-//     var /*@type=dynamic*/ v4 = super.bar = /*@typeArgs=dynamic*/ f();
-//                                      ^^^
-//
-// pkg/front_end/testcases/inference/unresolved_super.dart:16:37: Error: Superclass has no method named '[]='.
-//     var /*@type=dynamic*/ v5 = super[0] = /*@typeArgs=dynamic*/ f();
-//                                     ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:12:38: Error: Superclass has no method named 'foo'.
+//     var /*@type=dynamic*/ v1 = super.foo(/*@typeArgs=dynamic*/ f());
+//                                      ^^^
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:13:38: Error: Superclass has no getter named 'bar'.
+//     var /*@type=dynamic*/ v2 = super.bar;
+//                                      ^^^
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:14:37: Error: Superclass has no method named '[]'.
+//     var /*@type=dynamic*/ v3 = super[0];
+//                                     ^
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:15:38: Error: Superclass has no setter named 'bar'.
+//     var /*@type=dynamic*/ v4 = super.bar = /*@typeArgs=dynamic*/ f();
+//                                      ^^^
+//
+// pkg/front_end/testcases/inference/unresolved_super.dart:16:37: Error: Superclass has no method named '[]='.
+//     var /*@type=dynamic*/ v5 = super[0] = /*@typeArgs=dynamic*/ f();
+//                                     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.legacy.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.legacy.expect
index f304027..361c9d3 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.legacy.expect
@@ -1,26 +1,16 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:39: Error: An equality expression can't be an operand of another equality expression.
-// Try re-writing the expression.
-// var /*@topType=dynamic*/v = (f<dynamic>)(() { return 1; });
-//                                       ^
-//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:40: Error: Expected an identifier, but got ')'.
-// var /*@topType=dynamic*/v = (f<dynamic>)(() { return 1; });
-//                                        ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:39: Error: An equality expression can't be an operand of another equality expression.
-// Try re-writing the expression.
-// var /*@topType=dynamic*/v = (f<dynamic>)(() { return 1; });
-//                                       ^
-//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:40: Error: Expected an identifier, but got ')'.
-// var /*@topType=dynamic*/v = (f<dynamic>)(() { return 1; });
-//                                        ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:39: Error: An equality expression can't be an operand of another equality expression.
+// Try re-writing the expression.
+// var /*@topType=dynamic*/v = (f<dynamic>)(() { return 1; });
+//                                       ^
+//
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:40: Error: Expected an identifier, but got ')'.
+// var /*@topType=dynamic*/v = (f<dynamic>)(() { return 1; });
+//                                        ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.legacy.transformed.expect
index 3b1f5af..361c9d3 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:39: Error: An equality expression can't be an operand of another equality expression.
 // Try re-writing the expression.
@@ -8,8 +10,7 @@
 // pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:40: Error: Expected an identifier, but got ')'.
 // var /*@topType=dynamic*/v = (f<dynamic>)(() { return 1; });
 //                                        ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.outline.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.outline.expect
index c2f5ee2..58e5d4b 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:39: Error: An equality expression can't be an operand of another equality expression.
 // Try re-writing the expression.
@@ -8,8 +10,7 @@
 // pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:40: Error: Expected an identifier, but got ')'.
 // var /*@topType=dynamic*/v = (f<dynamic>)(() { return 1; });
 //                                        ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.legacy.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.legacy.expect
index 4565b79..4492f7c 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.legacy.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.legacy.expect
@@ -1,26 +1,16 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:35: Error: An equality expression can't be an operand of another equality expression.
-// Try re-writing the expression.
-// var /*@topType=dynamic*/v = (f<int>)(() { return 1; });
-//                                   ^
-//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:36: Error: Expected an identifier, but got ')'.
-// var /*@topType=dynamic*/v = (f<int>)(() { return 1; });
-//                                    ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:35: Error: An equality expression can't be an operand of another equality expression.
-// Try re-writing the expression.
-// var /*@topType=dynamic*/v = (f<int>)(() { return 1; });
-//                                   ^
-//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:36: Error: Expected an identifier, but got ')'.
-// var /*@topType=dynamic*/v = (f<int>)(() { return 1; });
-//                                    ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:35: Error: An equality expression can't be an operand of another equality expression.
+// Try re-writing the expression.
+// var /*@topType=dynamic*/v = (f<int>)(() { return 1; });
+//                                   ^
+//
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:36: Error: Expected an identifier, but got ')'.
+// var /*@topType=dynamic*/v = (f<int>)(() { return 1; });
+//                                    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.legacy.transformed.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.legacy.transformed.expect
index ddd2acd..4492f7c 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:35: Error: An equality expression can't be an operand of another equality expression.
 // Try re-writing the expression.
@@ -8,8 +10,7 @@
 // pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:36: Error: Expected an identifier, but got ')'.
 // var /*@topType=dynamic*/v = (f<int>)(() { return 1; });
 //                                    ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.outline.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.outline.expect
index e272c4b..6f5ce50 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.outline.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:35: Error: An equality expression can't be an operand of another equality expression.
 // Try re-writing the expression.
@@ -8,8 +10,7 @@
 // pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:36: Error: Expected an identifier, but got ')'.
 // var /*@topType=dynamic*/v = (f<int>)(() { return 1; });
 //                                    ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart.strong.expect b/pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart.strong.expect
index 819f137..637a638 100644
--- a/pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart:20:67: Error: Can't infer the type of 'c': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ c = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart:18:67: Error: Can't infer the type of 'b': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart:20:67: Error: Can't infer the type of 'c': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ c = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart:18:67: Error: Can't infer the type of 'b': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart:20:67: Error: Can't infer the type of 'c': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ c = /*@returnType=dynamic*/ () =>
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart:18:67: Error: Can't infer the type of 'b': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = /*@returnType=dynamic*/ () =>
+//                                                                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart.strong.transformed.expect b/pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart.strong.transformed.expect
index 475f95f..637a638 100644
--- a/pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/dependency_only_if_generic_method.dart:20:67: Error: Can't infer the type of 'c': circularity found during type inference.
 // Specify the type explicitly.
@@ -9,8 +11,7 @@
 // Specify the type explicitly.
 // var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = /*@returnType=dynamic*/ () =>
 //                                                                   ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart.strong.expect b/pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart.strong.expect
index 5820a4e..d2d6d0d 100644
--- a/pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart:17:67: Error: Can't infer the type of 'b': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = a();
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart:15:67: Error: Can't infer the type of 'a': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ a = /*@returnType=num*/ () =>
-//                                                                   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart:17:67: Error: Can't infer the type of 'b': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = a();
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart:15:67: Error: Can't infer the type of 'a': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ a = /*@returnType=num*/ () =>
-//                                                                   ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart:17:67: Error: Can't infer the type of 'b': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = a();
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart:15:67: Error: Can't infer the type of 'a': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ a = /*@returnType=num*/ () =>
+//                                                                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart.strong.transformed.expect b/pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart.strong.transformed.expect
index 085c83e..d2d6d0d 100644
--- a/pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/dependency_only_if_overloaded.dart:17:67: Error: Can't infer the type of 'b': circularity found during type inference.
 // Specify the type explicitly.
@@ -9,8 +11,7 @@
 // Specify the type explicitly.
 // var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ a = /*@returnType=num*/ () =>
 //                                                                   ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/field_inference_circularity.dart.strong.expect b/pkg/front_end/testcases/inference_new/field_inference_circularity.dart.strong.expect
index ec6e74e..0d47f0c 100644
--- a/pkg/front_end/testcases/inference_new/field_inference_circularity.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/field_inference_circularity.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference_new/field_inference_circularity.dart:12:69: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference_new/field_inference_circularity.dart:19:69: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x;
-//                                                                     ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference_new/field_inference_circularity.dart:12:69: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference_new/field_inference_circularity.dart:19:69: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x;
-//                                                                     ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference_new/field_inference_circularity.dart:12:69: Error: Can't infer the type of 'x': circularity found during type inference.
+// Specify the type explicitly.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
+//                                                                     ^
+//
+// pkg/front_end/testcases/inference_new/field_inference_circularity.dart:19:69: Error: Can't infer the type of 'x': circularity found during type inference.
+// Specify the type explicitly.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x;
+//                                                                     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/field_inference_circularity.dart.strong.transformed.expect b/pkg/front_end/testcases/inference_new/field_inference_circularity.dart.strong.transformed.expect
index 2635fe5..0d47f0c 100644
--- a/pkg/front_end/testcases/inference_new/field_inference_circularity.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference_new/field_inference_circularity.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/field_inference_circularity.dart:12:69: Error: Can't infer the type of 'x': circularity found during type inference.
 // Specify the type explicitly.
@@ -9,8 +11,7 @@
 // Specify the type explicitly.
 //   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x;
 //                                                                     ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart.strong.expect b/pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart.strong.expect
index 139d9e9..a921371 100644
--- a/pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart:10:53: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
 //  - 'Iterable' is from 'dart:core'.
@@ -19,8 +21,7 @@
 //  - 'Stream' is from 'dart:async'.
 //   await for (y in /*@error=ForInLoopTypeNotIterable*/ s) {}
 //                                                       ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart.strong.transformed.expect b/pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart.strong.transformed.expect
index 062ec9e..e1b9af6 100644
--- a/pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart.strong.transformed.expect
@@ -1,4 +1,27 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart:10:53: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+//  - 'Iterable' is from 'dart:core'.
+//   for (int x in /*@error=ForInLoopTypeNotIterable*/ s) {}
+//                                                     ^
+//
+// pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart:11:59: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+//  - 'Stream' is from 'dart:async'.
+//   await for (int x in /*@error=ForInLoopTypeNotIterable*/ s) {}
+//                                                           ^
+//
+// pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart:13:49: Error: The type 'String' used in the 'for' loop must implement 'Iterable<dynamic>'.
+//  - 'Iterable' is from 'dart:core'.
+//   for (y in /*@error=ForInLoopTypeNotIterable*/ s) {}
+//                                                 ^
+//
+// pkg/front_end/testcases/inference_new/for_each_invalid_iterable.dart:14:55: Error: The type 'String' used in the 'for' loop must implement 'Stream<dynamic>'.
+//  - 'Stream' is from 'dart:async'.
+//   await for (y in /*@error=ForInLoopTypeNotIterable*/ s) {}
+//                                                       ^
+//
 import self as self;
 import "dart:async" as asy;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart.strong.expect b/pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart.strong.expect
index 2662ee0..6d4a669 100644
--- a/pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart:26:55: Error: A value of type 'A' can't be assigned to a variable of type 'int'.
 //  - 'A' is from 'pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart'.
@@ -11,8 +13,7 @@
 // Try changing the type of the variable.
 //   await for (i /*@error=ForInLoopElementTypeNotAssignable*/ in stream) {}
 //                                                             ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart.strong.transformed.expect b/pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart.strong.transformed.expect
index b77def2..7cd375a 100644
--- a/pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart.strong.transformed.expect
@@ -1,4 +1,19 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart:26:55: Error: A value of type 'A' can't be assigned to a variable of type 'int'.
+//  - 'A' is from 'pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart'.
+// Try changing the type of the variable.
+//   for (i /*@error=ForInLoopElementTypeNotAssignable*/ in iterable) {}
+//                                                       ^
+//
+// pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart:27:61: Error: A value of type 'A' can't be assigned to a variable of type 'int'.
+//  - 'A' is from 'pkg/front_end/testcases/inference_new/for_each_outer_var_type.dart'.
+// Try changing the type of the variable.
+//   await for (i /*@error=ForInLoopElementTypeNotAssignable*/ in stream) {}
+//                                                             ^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/inference_new/infer_assign_to_index_super_upwards.dart.strong.expect b/pkg/front_end/testcases/inference_new/infer_assign_to_index_super_upwards.dart.strong.expect
index d69052b..58dc48e 100644
--- a/pkg/front_end/testcases/inference_new/infer_assign_to_index_super_upwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/infer_assign_to_index_super_upwards.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/infer_assign_to_index_super_upwards.dart:55:62: Error: A value of type 'int' can't be assigned to a variable of type 'double'.
 // Try changing the type of the left hand side, or casting the right hand side to 'double'.
@@ -34,8 +36,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //     var /*@type=double*/ v11 = super /*@target=Base::[]=*/ ['x']++;
 //                                                                 ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/infer_assign_to_index_this_upwards.dart.strong.expect b/pkg/front_end/testcases/inference_new/infer_assign_to_index_this_upwards.dart.strong.expect
index 53307d7..135f152 100644
--- a/pkg/front_end/testcases/inference_new/infer_assign_to_index_this_upwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/infer_assign_to_index_this_upwards.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/infer_assign_to_index_this_upwards.dart:56:62: Error: A value of type 'int' can't be assigned to a variable of type 'double'.
 // Try changing the type of the left hand side, or casting the right hand side to 'double'.
@@ -34,8 +36,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //     var /*@type=double*/ v11 = this /*@target=Test7::[]=*/ ['x']++;
 //                                                                 ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/infer_assign_to_index_upwards.dart.strong.expect b/pkg/front_end/testcases/inference_new/infer_assign_to_index_upwards.dart.strong.expect
index eb0925f..784bbce 100644
--- a/pkg/front_end/testcases/inference_new/infer_assign_to_index_upwards.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/infer_assign_to_index_upwards.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/infer_assign_to_index_upwards.dart:47:56: Error: A value of type 'int' can't be assigned to a variable of type 'double'.
 // Try changing the type of the left hand side, or casting the right hand side to 'double'.
@@ -34,8 +36,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   var /*@type=double*/ v11 = t /*@target=Test::[]=*/ ['x']++;
 //                                                           ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/infer_assign_to_property_custom.dart.strong.expect b/pkg/front_end/testcases/inference_new/infer_assign_to_property_custom.dart.strong.expect
index 5b13bca..0299145 100644
--- a/pkg/front_end/testcases/inference_new/infer_assign_to_property_custom.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/infer_assign_to_property_custom.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/infer_assign_to_property_custom.dart:17:37: Error: A value of type 'int' can't be assigned to a variable of type 'A'.
 //  - 'A' is from 'pkg/front_end/testcases/inference_new/infer_assign_to_property_custom.dart'.
@@ -23,8 +25,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'A'.
 // var /*@topType=A*/ v_postfix_mm = (new B(). /*@target=B::a*/ a--);
 //                                                               ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/infer_field_getter_setter_mismatch.dart.strong.expect b/pkg/front_end/testcases/inference_new/infer_field_getter_setter_mismatch.dart.strong.expect
index cd1113c..fe82b93 100644
--- a/pkg/front_end/testcases/inference_new/infer_field_getter_setter_mismatch.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/infer_field_getter_setter_mismatch.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/infer_field_getter_setter_mismatch.dart:16:24: Error: The return type of the method 'B.x' is 'int', which does not match the return type of the overridden method, 'double'.
 // Change to a subtype of 'double'.
@@ -7,15 +9,7 @@
 // pkg/front_end/testcases/inference_new/infer_field_getter_setter_mismatch.dart:10:12: Context: This is the overridden method ('x').
 //   void set x(double value);
 //            ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference_new/infer_field_getter_setter_mismatch.dart:16:24: Error: The return type of the method 'B.x' is 'int', which does not match the return type of the overridden method, 'double'.
-// Change to a subtype of 'double'.
-//   var /*@topType=int*/ x;
-//                        ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/infer_field_override_getter_overrides_setter.dart.strong.expect b/pkg/front_end/testcases/inference_new/infer_field_override_getter_overrides_setter.dart.strong.expect
index 0dbade9..57b6ceb 100644
--- a/pkg/front_end/testcases/inference_new/infer_field_override_getter_overrides_setter.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/infer_field_override_getter_overrides_setter.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/infer_field_override_getter_overrides_setter.dart:19:24: Error: The return type of the method 'C.x' is 'int', which does not match the return type of the overridden method, 'num'.
 // Change to a subtype of 'num'.
@@ -7,15 +9,7 @@
 // pkg/front_end/testcases/inference_new/infer_field_override_getter_overrides_setter.dart:9:12: Context: This is the overridden method ('x').
 //   void set x(num value);
 //            ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/inference_new/infer_field_override_getter_overrides_setter.dart:19:24: Error: The return type of the method 'C.x' is 'int', which does not match the return type of the overridden method, 'num'.
-// Change to a subtype of 'num'.
-//   var /*@topType=int*/ x;
-//                        ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart.strong.expect b/pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart.strong.expect
index cb12150..c125a14 100644
--- a/pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart:11:69: Error: Can't infer the type of 'b': circularity found during type inference.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = /*@returnType=dynamic*/ () =>
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart:17:67: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart:11:69: Error: Can't infer the type of 'b': circularity found during type inference.
-// Specify the type explicitly.
-//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = /*@returnType=dynamic*/ () =>
-//                                                                     ^
-//
-// pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart:17:67: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart:11:69: Error: Can't infer the type of 'b': circularity found during type inference.
+// Specify the type explicitly.
+//   var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ b = /*@returnType=dynamic*/ () =>
+//                                                                     ^
+//
+// pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart:17:67: Error: Can't infer the type of 'x': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
+//                                                                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart.strong.transformed.expect b/pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart.strong.transformed.expect
index 68e3c75..c125a14 100644
--- a/pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/infer_instance_field_ref_circular.dart:11:69: Error: Can't infer the type of 'b': circularity found during type inference.
 // Specify the type explicitly.
@@ -9,8 +11,7 @@
 // Specify the type explicitly.
 // var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
 //                                                                   ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/invalid_assignment_during_toplevel_inference.dart.strong.expect b/pkg/front_end/testcases/inference_new/invalid_assignment_during_toplevel_inference.dart.strong.expect
index ecb2ddf..28a9284 100644
--- a/pkg/front_end/testcases/inference_new/invalid_assignment_during_toplevel_inference.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/invalid_assignment_during_toplevel_inference.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/invalid_assignment_during_toplevel_inference.dart:9:62: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 // var /*@topType=String*/ x = i = /*@error=InvalidAssignment*/ s;
 //                                                              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/strongly_connected_component.dart.strong.expect b/pkg/front_end/testcases/inference_new/strongly_connected_component.dart.strong.expect
index e40ce71..6f86a2f 100644
--- a/pkg/front_end/testcases/inference_new/strongly_connected_component.dart.strong.expect
+++ b/pkg/front_end/testcases/inference_new/strongly_connected_component.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/inference_new/strongly_connected_component.dart:19:67: Error: Can't infer the type of 'y': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ y = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference_new/strongly_connected_component.dart:17:67: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/inference_new/strongly_connected_component.dart:19:67: Error: Can't infer the type of 'y': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ y = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-//
-// pkg/front_end/testcases/inference_new/strongly_connected_component.dart:17:67: Error: Can't infer the type of 'x': circularity found during type inference.
-// Specify the type explicitly.
-// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
-//                                                                   ^
-
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/inference_new/strongly_connected_component.dart:19:67: Error: Can't infer the type of 'y': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ y = /*@returnType=dynamic*/ () =>
+//                                                                   ^
+//
+// pkg/front_end/testcases/inference_new/strongly_connected_component.dart:17:67: Error: Can't infer the type of 'x': circularity found during type inference.
+// Specify the type explicitly.
+// var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
+//                                                                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/inference_new/strongly_connected_component.dart.strong.transformed.expect b/pkg/front_end/testcases/inference_new/strongly_connected_component.dart.strong.transformed.expect
index 322965f..6f86a2f 100644
--- a/pkg/front_end/testcases/inference_new/strongly_connected_component.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/inference_new/strongly_connected_component.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/inference_new/strongly_connected_component.dart:19:67: Error: Can't infer the type of 'y': circularity found during type inference.
 // Specify the type explicitly.
@@ -9,8 +11,7 @@
 // Specify the type explicitly.
 // var /*@topType=dynamic*/ /*@error=CantInferTypeDueToCircularity*/ x = /*@returnType=dynamic*/ () =>
 //                                                                   ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart.strong.expect
index e284a0c..09bfacb 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart:11:13: Error: Inferred type argument 'Comparable<dynamic>' doesn't conform to the bound 'Comparable<T>' of the type variable 'T' on 'B'.
 //  - 'Comparable' is from 'dart:core'.
@@ -8,16 +10,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart:9:9: Context: This is the type variable whose bound isn't conformed to.
 // class B<T extends Comparable<T>> {}
 //         ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart:11:13: Error: Inferred type argument 'Comparable<dynamic>' doesn't conform to the bound 'Comparable<T>' of the type variable 'T' on 'B'.
-//  - 'Comparable' is from 'dart:core'.
-// Try specifying type arguments explicitly so that they conform to the bounds.
-// var y = new B();
-//             ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart.strong.transformed.expect
index 59eda90..09bfacb 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart.strong.transformed.expect
@@ -1,12 +1,16 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart:11:13: Error: Inferred type argument 'Comparable<dynamic>' doesn't conform to the bound 'Comparable<T>' of the type variable 'T' on 'B'.
 //  - 'Comparable' is from 'dart:core'.
 // Try specifying type arguments explicitly so that they conform to the bounds.
 // var y = new B();
 //             ^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/inference_super_bounded_rejected.dart:9:9: Context: This is the type variable whose bound isn't conformed to.
+// class B<T extends Comparable<T>> {}
+//         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.legacy.expect b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.legacy.expect
index 8b55dbe..54c9d27 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.legacy.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.legacy.expect
@@ -1,48 +1,27 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:9: Error: Type 'T' is a bound of itself via 'U', 'Y', 'Z'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
-//         ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:22: Error: Type 'U' is a bound of itself via 'Y', 'Z', 'T'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
-//                      ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:28: Error: Type 'Y' is a bound of itself via 'Z', 'T', 'U'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-//     X extends Function(V), Y extends Z, Z extends T> {}
-//                            ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:41: Error: Type 'Z' is a bound of itself via 'T', 'U', 'Y'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-//     X extends Function(V), Y extends Z, Z extends T> {}
-//                                         ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:9: Error: Type 'T' is a bound of itself via 'U', 'Y', 'Z'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
-//         ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:22: Error: Type 'U' is a bound of itself via 'Y', 'Z', 'T'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
-//                      ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:28: Error: Type 'Y' is a bound of itself via 'Z', 'T', 'U'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-//     X extends Function(V), Y extends Z, Z extends T> {}
-//                            ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:41: Error: Type 'Z' is a bound of itself via 'T', 'U', 'Y'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-//     X extends Function(V), Y extends Z, Z extends T> {}
-//                                         ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:9: Error: Type 'T' is a bound of itself via 'U', 'Y', 'Z'.
+// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
+// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
+//         ^
+//
+// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:22: Error: Type 'U' is a bound of itself via 'Y', 'Z', 'T'.
+// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
+// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
+//                      ^
+//
+// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:28: Error: Type 'Y' is a bound of itself via 'Z', 'T', 'U'.
+// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
+//     X extends Function(V), Y extends Z, Z extends T> {}
+//                            ^
+//
+// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:41: Error: Type 'Z' is a bound of itself via 'T', 'U', 'Y'.
+// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
+//     X extends Function(V), Y extends Z, Z extends T> {}
+//                                         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.legacy.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.legacy.transformed.expect
index 7af2967..54c9d27 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:9: Error: Type 'T' is a bound of itself via 'U', 'Y', 'Z'.
 // Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
@@ -19,8 +21,7 @@
 // Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
 //     X extends Function(V), Y extends Z, Z extends T> {}
 //                                         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.outline.expect b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.outline.expect
index 3a0c08a..717342c 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.outline.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:9: Error: Type 'T' is a bound of itself via 'U', 'Y', 'Z'.
 // Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
@@ -19,8 +21,7 @@
 // Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
 //     X extends Function(V), Y extends Z, Z extends T> {}
 //                                         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.strong.expect
index 27c679f..a41b0e8 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.strong.expect
@@ -1,48 +1,27 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:9: Error: Type 'T' is a bound of itself via 'U', 'Y', 'Z'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
-//         ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:22: Error: Type 'U' is a bound of itself via 'Y', 'Z', 'T'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
-//                      ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:28: Error: Type 'Y' is a bound of itself via 'Z', 'T', 'U'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-//     X extends Function(V), Y extends Z, Z extends T> {}
-//                            ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:41: Error: Type 'Z' is a bound of itself via 'T', 'U', 'Y'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-//     X extends Function(V), Y extends Z, Z extends T> {}
-//                                         ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:9: Error: Type 'T' is a bound of itself via 'U', 'Y', 'Z'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
-//         ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:22: Error: Type 'U' is a bound of itself via 'Y', 'Z', 'T'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
-//                      ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:28: Error: Type 'Y' is a bound of itself via 'Z', 'T', 'U'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-//     X extends Function(V), Y extends Z, Z extends T> {}
-//                            ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:41: Error: Type 'Z' is a bound of itself via 'T', 'U', 'Y'.
-// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
-//     X extends Function(V), Y extends Z, Z extends T> {}
-//                                         ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:9: Error: Type 'T' is a bound of itself via 'U', 'Y', 'Z'.
+// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
+// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
+//         ^
+//
+// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:22: Error: Type 'U' is a bound of itself via 'Y', 'Z', 'T'.
+// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
+// class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
+//                      ^
+//
+// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:28: Error: Type 'Y' is a bound of itself via 'Z', 'T', 'U'.
+// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
+//     X extends Function(V), Y extends Z, Z extends T> {}
+//                            ^
+//
+// pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:42:41: Error: Type 'Z' is a bound of itself via 'T', 'U', 'Y'.
+// Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
+//     X extends Function(V), Y extends Z, Z extends T> {}
+//                                         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.strong.transformed.expect
index 9d8065d..a41b0e8 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/multiple_strongly_connected.dart:41:9: Error: Type 'T' is a bound of itself via 'U', 'Y', 'Z'.
 // Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
@@ -19,8 +21,7 @@
 // Try breaking the cycle by removing at least on of the 'extends' clauses in the cycle.
 //     X extends Function(V), Y extends Z, Z extends T> {}
 //                                         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart.strong.expect
index e89a46a..8d64011 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart:12:9: Error: Generic type 'A' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'A' here.
@@ -7,15 +9,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart:10:16: Context: Bound of this variable references variable 'TypeT' from the same declaration.
 // class A<TypeT, TypeS extends TypeT> {}
 //                ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart:12:9: Error: Generic type 'A' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'A' here.
-// class B<TypeU extends A> {}
-//         ^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart.strong.transformed.expect
index c3579fe..8d64011 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart.strong.transformed.expect
@@ -1,11 +1,15 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart:12:9: Error: Generic type 'A' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'A' here.
 // class B<TypeU extends A> {}
 //         ^^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_non_simple.dart:10:16: Context: Bound of this variable references variable 'TypeT' from the same declaration.
+// class A<TypeT, TypeS extends TypeT> {}
+//                ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart.strong.expect
index 9118cd2..4e815e9 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart:11:9: Error: Generic type 'A' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'A' here.
@@ -7,15 +9,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart:9:16: Context: Bound of this variable references variable 'TypeT' from the same declaration.
 // class A<TypeT, TypeS extends TypeT> {}
 //                ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart:11:9: Error: Generic type 'A' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'A' here.
-// class B<TypeU extends A> {}
-//         ^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart.strong.transformed.expect
index d926c68..4e815e9 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart.strong.transformed.expect
@@ -1,11 +1,15 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart:11:9: Error: Generic type 'A' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'A' here.
 // class B<TypeU extends A> {}
 //         ^^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_bound_due_to_variables.dart:9:16: Context: Bound of this variable references variable 'TypeT' from the same declaration.
+// class A<TypeT, TypeS extends TypeT> {}
+//                ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart.strong.expect
index d1f9062..c7037fd 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart:11:9: Error: Generic type 'Fisk' can't be used without type arguments in the bounds of its own type variables. It is referenced indirectly through 'Hest'.
 // Try providing type arguments to 'Hest' here or to some other raw types in the bounds along the reference chain.
@@ -10,15 +12,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart:9:12: Context: Bound of this variable references raw type 'Fisk'.
 // class Hest<TypeX extends Fisk> {}
 //            ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart:11:9: Error: Generic type 'Fisk' can't be used without type arguments in the bounds of its own type variables. It is referenced indirectly through 'Hest'.
-// Try providing type arguments to 'Hest' here or to some other raw types in the bounds along the reference chain.
-// typedef Fisk = void Function<TypeY extends Hest>();
-//         ^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart.strong.transformed.expect
index bd3dbbb..c7037fd 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart.strong.transformed.expect
@@ -1,11 +1,18 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart:11:9: Error: Generic type 'Fisk' can't be used without type arguments in the bounds of its own type variables. It is referenced indirectly through 'Hest'.
 // Try providing type arguments to 'Hest' here or to some other raw types in the bounds along the reference chain.
 // typedef Fisk = void Function<TypeY extends Hest>();
 //         ^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart:11:30: Context: Bound of this variable references raw type 'Hest'.
+// typedef Fisk = void Function<TypeY extends Hest>();
+//                              ^^^^^
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_class_parametrized_typedef_cycle.dart:9:12: Context: Bound of this variable references raw type 'Fisk'.
+// class Hest<TypeX extends Fisk> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart.strong.expect
index b12ba48..e3cf58b 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart:10:14: Error: Generic type 'Fisk' can't be used without type arguments in the bounds of its own type variables. It is referenced indirectly through 'Hest'.
 // Try providing type arguments to 'Hest' here or to some other raw types in the bounds along the reference chain.
@@ -10,15 +12,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart:8:12: Context: Bound of this variable references raw type 'Fisk'.
 // class Hest<TypeX extends Fisk> {}
 //            ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart:10:14: Error: Generic type 'Fisk' can't be used without type arguments in the bounds of its own type variables. It is referenced indirectly through 'Hest'.
-// Try providing type arguments to 'Hest' here or to some other raw types in the bounds along the reference chain.
-// typedef void Fisk<TypeY extends Hest>();
-//              ^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart.strong.transformed.expect
index dfe5718..e3cf58b 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart.strong.transformed.expect
@@ -1,11 +1,18 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart:10:14: Error: Generic type 'Fisk' can't be used without type arguments in the bounds of its own type variables. It is referenced indirectly through 'Hest'.
 // Try providing type arguments to 'Hest' here or to some other raw types in the bounds along the reference chain.
 // typedef void Fisk<TypeY extends Hest>();
 //              ^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart:10:19: Context: Bound of this variable references raw type 'Hest'.
+// typedef void Fisk<TypeY extends Hest>();
+//                   ^^^^^
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_class_typedef_cycle.dart:8:12: Context: Bound of this variable references raw type 'Fisk'.
+// class Hest<TypeX extends Fisk> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart.strong.expect
index 62dc787..5600160 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart.strong.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart:8:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
-// Try providing type arguments to 'Hest' here.
-// class Hest<TypeX extends Hest> {}
-//            ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart:8:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
-// Try providing type arguments to 'Hest' here.
-// class Hest<TypeX extends Hest> {}
-//            ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart:8:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
+// Try providing type arguments to 'Hest' here.
+// class Hest<TypeX extends Hest> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart.strong.transformed.expect
index a35f146..5600160 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart.strong.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive.dart:8:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
 // Try providing type arguments to 'Hest' here.
 // class Hest<TypeX extends Hest> {}
 //            ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart.strong.expect
index 6b66d03..c5e07d0 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart:8:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
-// Try providing type arguments to 'Hest' here.
-// class Hest<TypeX extends Hest, TypeY extends Hest> {}
-//            ^^^^^
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart:8:32: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
-// Try providing type arguments to 'Hest' here.
-// class Hest<TypeX extends Hest, TypeY extends Hest> {}
-//                                ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart:8:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
-// Try providing type arguments to 'Hest' here.
-// class Hest<TypeX extends Hest, TypeY extends Hest> {}
-//            ^^^^^
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart:8:32: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
-// Try providing type arguments to 'Hest' here.
-// class Hest<TypeX extends Hest, TypeY extends Hest> {}
-//                                ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart:8:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
+// Try providing type arguments to 'Hest' here.
+// class Hest<TypeX extends Hest, TypeY extends Hest> {}
+//            ^^^^^
+//
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart:8:32: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
+// Try providing type arguments to 'Hest' here.
+// class Hest<TypeX extends Hest, TypeY extends Hest> {}
+//                                ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart.strong.transformed.expect
index 6594227..c5e07d0 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_for_each.dart:8:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
 // Try providing type arguments to 'Hest' here.
@@ -9,8 +11,7 @@
 // Try providing type arguments to 'Hest' here.
 // class Hest<TypeX extends Hest, TypeY extends Hest> {}
 //                                ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart.strong.expect
index 673dbbd..834692d 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart.strong.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart:9:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
-// Try providing type arguments to 'Hest' here.
-// class Hest<TypeX extends Map<Hest, Hest>> {}
-//            ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart:9:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
-// Try providing type arguments to 'Hest' here.
-// class Hest<TypeX extends Map<Hest, Hest>> {}
-//            ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart:9:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
+// Try providing type arguments to 'Hest' here.
+// class Hest<TypeX extends Map<Hest, Hest>> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart.strong.transformed.expect
index bfd0570..834692d 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart.strong.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_co_inductive_no_dup.dart:9:12: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables.
 // Try providing type arguments to 'Hest' here.
 // class Hest<TypeX extends Map<Hest, Hest>> {}
 //            ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart.strong.expect
index 143c0fc..326f710 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart.strong.expect
@@ -1,34 +1,23 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'Hest' here.
-// class Fisk<TypeY extends Hest, TypeZ extends Hest> {}
-//            ^^^^^
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
-// class Hest<TypeX extends Hest<TypeX>> {}
-//            ^^^^^
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:11:32: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'Hest' here.
-// class Fisk<TypeY extends Hest, TypeZ extends Hest> {}
-//                                ^^^^^
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
-// class Hest<TypeX extends Hest<TypeX>> {}
-//            ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'Hest' here.
-// class Fisk<TypeY extends Hest, TypeZ extends Hest> {}
-//            ^^^^^
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:11:32: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'Hest' here.
-// class Fisk<TypeY extends Hest, TypeZ extends Hest> {}
-//                                ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
+// Try providing type arguments to 'Hest' here.
+// class Fisk<TypeY extends Hest, TypeZ extends Hest> {}
+//            ^^^^^
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
+// class Hest<TypeX extends Hest<TypeX>> {}
+//            ^^^^^
+//
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:11:32: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
+// Try providing type arguments to 'Hest' here.
+// class Fisk<TypeY extends Hest, TypeZ extends Hest> {}
+//                                ^^^^^
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
+// class Hest<TypeX extends Hest<TypeX>> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart.strong.transformed.expect
index c98d064..326f710 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart.strong.transformed.expect
@@ -1,16 +1,23 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
 // class Fisk<TypeY extends Hest, TypeZ extends Hest> {}
 //            ^^^^^
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
+// class Hest<TypeX extends Hest<TypeX>> {}
+//            ^^^^^
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:11:32: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
 // class Fisk<TypeY extends Hest, TypeZ extends Hest> {}
 //                                ^^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_for_each.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
+// class Hest<TypeX extends Hest<TypeX>> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart.strong.expect
index 4dbf4e5..4df8590 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart.strong.expect
@@ -1,30 +1,18 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart:15:12: Error: Generic type 'LinkedListEntry' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'LinkedListEntry' here.
-// class Hest<X extends LinkedListEntry> {}
-//            ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart:15:12: Error: Type argument 'LinkedListEntry<dynamic>' doesn't conform to the bound 'LinkedListEntry<E>' of the type variable 'E' on 'LinkedListEntry'.
-//  - 'LinkedListEntry' is from 'dart:collection'.
-// Try changing type arguments so that they conform to the bounds.
-// class Hest<X extends LinkedListEntry> {}
-//            ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart:15:12: Error: Generic type 'LinkedListEntry' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'LinkedListEntry' here.
-// class Hest<X extends LinkedListEntry> {}
-//            ^
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart:15:12: Error: Type argument 'LinkedListEntry<dynamic>' doesn't conform to the bound 'LinkedListEntry<E>' of the type variable 'E' on 'LinkedListEntry'.
-//  - 'LinkedListEntry' is from 'dart:collection'.
-// Try changing type arguments so that they conform to the bounds.
-// class Hest<X extends LinkedListEntry> {}
-//            ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart:15:12: Error: Generic type 'LinkedListEntry' can't be used without type arguments in a type variable bound.
+// Try providing type arguments to 'LinkedListEntry' here.
+// class Hest<X extends LinkedListEntry> {}
+//            ^
+//
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart:15:12: Error: Type argument 'LinkedListEntry<dynamic>' doesn't conform to the bound 'LinkedListEntry<E>' of the type variable 'E' on 'LinkedListEntry'.
+//  - 'LinkedListEntry' is from 'dart:collection'.
+// Try changing type arguments so that they conform to the bounds.
+// class Hest<X extends LinkedListEntry> {}
+//            ^
+//
 import self as self;
 import "dart:collection" as col;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart.strong.transformed.expect
index 5e791e7..4df8590 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_from_compiled.dart:15:12: Error: Generic type 'LinkedListEntry' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'LinkedListEntry' here.
@@ -10,8 +12,7 @@
 // Try changing type arguments so that they conform to the bounds.
 // class Hest<X extends LinkedListEntry> {}
 //            ^
-
-library;
+//
 import self as self;
 import "dart:collection" as col;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart.strong.expect
index 02af574..6fa7b7c 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart:11:12: Error: Type variables can't have generic function types in their bounds.
-// class Fisk<TypeY extends Function<TypeZ extends Hest<Null>>(TypeZ)> {}
-//            ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart:11:12: Error: Type variables can't have generic function types in their bounds.
-// class Fisk<TypeY extends Function<TypeZ extends Hest<Null>>(TypeZ)> {}
-//            ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart:11:12: Error: Type variables can't have generic function types in their bounds.
+// class Fisk<TypeY extends Function<TypeZ extends Hest<Null>>(TypeZ)> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart.strong.transformed.expect
index 4bf5fbc..6fa7b7c 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_generic_function_in_bound_regress.dart:11:12: Error: Type variables can't have generic function types in their bounds.
 // class Fisk<TypeY extends Function<TypeZ extends Hest<Null>>(TypeZ)> {}
 //            ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart.strong.expect
index ad61fa0..8f7b853 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart:12:15: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
@@ -15,20 +17,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart:10:12: Context: Bound of this variable references variable 'TypeY' from the same declaration.
 // class Fisk<TypeY extends Fisk<TypeY>> {}
 //            ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart:12:15: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'Hest' here.
-// class Naebdyr<TypeZ extends Map<Hest, Fisk>> {}
-//               ^^^^^
-//
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart:12:15: Error: Generic type 'Fisk' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'Fisk' here.
-// class Naebdyr<TypeZ extends Map<Hest, Fisk>> {}
-//               ^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart.strong.transformed.expect
index e5de63c..8f7b853 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart.strong.transformed.expect
@@ -1,16 +1,23 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart:12:15: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
 // class Naebdyr<TypeZ extends Map<Hest, Fisk>> {}
 //               ^^^^^
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart:8:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
+// class Hest<TypeX extends Hest<TypeX>> {}
+//            ^^^^^
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart:12:15: Error: Generic type 'Fisk' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Fisk' here.
 // class Naebdyr<TypeZ extends Map<Hest, Fisk>> {}
 //               ^^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_many.dart:10:12: Context: Bound of this variable references variable 'TypeY' from the same declaration.
+// class Fisk<TypeY extends Fisk<TypeY>> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart.strong.expect
index 13d4805..a2b1c00 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart:11:7: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables. It is referenced indirectly through 'Hest'.
 // Try providing type arguments to 'Hest' here or to some other raw types in the bounds along the reference chain.
@@ -10,15 +12,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle_lib.dart:16:12: Context: Bound of this variable references raw type 'Hest'.
 // class Hest<TypeY extends lib.Hest> {}
 //            ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart:11:7: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables. It is referenced indirectly through 'Hest'.
-// Try providing type arguments to 'Hest' here or to some other raw types in the bounds along the reference chain.
-// class Hest<TypeX extends lib.Hest> {}
-//       ^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart.strong.transformed.expect
index 9b12ea3..a2b1c00 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart.strong.transformed.expect
@@ -1,11 +1,18 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart:11:7: Error: Generic type 'Hest' can't be used without type arguments in the bounds of its own type variables. It is referenced indirectly through 'Hest'.
 // Try providing type arguments to 'Hest' here or to some other raw types in the bounds along the reference chain.
 // class Hest<TypeX extends lib.Hest> {}
 //       ^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle.dart:11:12: Context: Bound of this variable references raw type 'Hest'.
+// class Hest<TypeX extends lib.Hest> {}
+//            ^^^^^
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_many_libs_same_name_cycle_lib.dart:16:12: Context: Bound of this variable references raw type 'Hest'.
+// class Hest<TypeY extends lib.Hest> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart.strong.expect
index 061e900..1e42409 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
@@ -7,15 +9,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
 // class Hest<TypeX extends Hest<TypeX>> {}
 //            ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'Hest' here.
-// class Fisk<TypeY extends Map<Hest, Hest>> {}
-//            ^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart.strong.transformed.expect
index dd60b38..1e42409 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart.strong.transformed.expect
@@ -1,11 +1,15 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
 // class Fisk<TypeY extends Map<Hest, Hest>> {}
 //            ^^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_no_dup.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
+// class Hest<TypeX extends Hest<TypeX>> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart.strong.expect
index c4fbe14..ae65387 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
@@ -7,15 +9,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
 // class Hest<TypeX extends Hest<TypeX>> {}
 //            ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'Hest' here.
-// class Fisk<TypeY extends Hest> {}
-//            ^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart.strong.transformed.expect
index 56452e6..ae65387 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart.strong.transformed.expect
@@ -1,11 +1,15 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart:11:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
 // class Fisk<TypeY extends Hest> {}
 //            ^^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_suppress_consequence.dart:9:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
+// class Hest<TypeX extends Hest<TypeX>> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart.strong.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart.strong.expect
index a5b4ddf..b94bb61 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart.strong.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart:12:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
@@ -7,15 +9,7 @@
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart:10:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
 // class Hest<TypeX extends Hest<TypeX>> {}
 //            ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart:12:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
-// Try providing type arguments to 'Hest' here.
-// class Fisk<TypeY extends Hest> {}
-//            ^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart.strong.transformed.expect b/pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart.strong.transformed.expect
index 5953737..b94bb61 100644
--- a/pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart.strong.transformed.expect
@@ -1,11 +1,15 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart:12:12: Error: Generic type 'Hest' can't be used without type arguments in a type variable bound.
 // Try providing type arguments to 'Hest' here.
 // class Fisk<TypeY extends Hest> {}
 //            ^^^^^
-
-library;
+// pkg/front_end/testcases/instantiate_to_bound/non_simple_variables_from_same.dart:10:12: Context: Bound of this variable references variable 'TypeX' from the same declaration.
+// class Hest<TypeX extends Hest<TypeX>> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/invalid_assignment.dart.strong.expect b/pkg/front_end/testcases/invalid_assignment.dart.strong.expect
index e32b7ae..c15f6aa 100644
--- a/pkg/front_end/testcases/invalid_assignment.dart.strong.expect
+++ b/pkg/front_end/testcases/invalid_assignment.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/invalid_assignment.dart:13:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
@@ -15,8 +17,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'A'.
 //   a /*@error=InvalidAssignment*/ += 1;
 //                                  ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/invalid_assignment.dart.strong.transformed.expect b/pkg/front_end/testcases/invalid_assignment.dart.strong.transformed.expect
index 9ec525b..c15f6aa 100644
--- a/pkg/front_end/testcases/invalid_assignment.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/invalid_assignment.dart.strong.transformed.expect
@@ -1,4 +1,23 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/invalid_assignment.dart:13:36: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   i = /*@error=InvalidAssignment*/ s;
+//                                    ^
+//
+// pkg/front_end/testcases/invalid_assignment.dart:15:38: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   i ??= /*@error=InvalidAssignment*/ s;
+//                                      ^
+//
+// pkg/front_end/testcases/invalid_assignment.dart:17:34: Error: A value of type 'String' can't be assigned to a variable of type 'A'.
+//  - 'A' is from 'pkg/front_end/testcases/invalid_assignment.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'A'.
+//   a /*@error=InvalidAssignment*/ += 1;
+//                                  ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/invalid_cast.dart.strong.expect b/pkg/front_end/testcases/invalid_cast.dart.strong.expect
index 9dbe0db..254485f 100644
--- a/pkg/front_end/testcases/invalid_cast.dart.strong.expect
+++ b/pkg/front_end/testcases/invalid_cast.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/invalid_cast.dart:22:60: Error: The list literal type 'List<Object>' isn't of expected type 'List<int>'.
 //  - 'List' is from 'dart:core'.
@@ -58,8 +60,7 @@
 // Change the type of the function or the context in which it is used.
 //   void Function(Object) k = /*@error=InvalidCastLocalFunction*/ localFunction;
 //                                                                 ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/invalid_cast.dart.strong.transformed.expect b/pkg/front_end/testcases/invalid_cast.dart.strong.transformed.expect
index acceaa9..a04133c 100644
--- a/pkg/front_end/testcases/invalid_cast.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/invalid_cast.dart.strong.transformed.expect
@@ -1,4 +1,66 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/invalid_cast.dart:22:60: Error: The list literal type 'List<Object>' isn't of expected type 'List<int>'.
+//  - 'List' is from 'dart:core'.
+//  - 'Object' is from 'dart:core'.
+// Change the type of the list literal or the context in which it is used.
+//   List<int> a = <Object> /*@error=InvalidCastLiteralList*/ [];
+//                                                            ^
+//
+// pkg/front_end/testcases/invalid_cast.dart:23:74: Error: The map literal type 'Map<Object, String>' isn't of expected type 'Map<int, String>'.
+//  - 'Map' is from 'dart:core'.
+//  - 'Object' is from 'dart:core'.
+// Change the type of the map literal or the context in which it is used.
+//   Map<int, String> b = <Object, String> /*@error=InvalidCastLiteralMap*/ {};
+//                                                                          ^
+//
+// pkg/front_end/testcases/invalid_cast.dart:24:71: Error: The map literal type 'Map<int, Object>' isn't of expected type 'Map<int, String>'.
+//  - 'Map' is from 'dart:core'.
+//  - 'Object' is from 'dart:core'.
+// Change the type of the map literal or the context in which it is used.
+//   Map<int, String> c = <int, Object> /*@error=InvalidCastLiteralMap*/ {};
+//                                                                       ^
+//
+// pkg/front_end/testcases/invalid_cast.dart:25:63: Error: The function expression type 'int Function(int)' isn't of expected type 'int Function(Object)'.
+//  - 'Object' is from 'dart:core'.
+// Change the type of the function expression or the context in which it is used.
+//   int Function(Object) d = /*@error=InvalidCastFunctionExpr*/ (int i) => i;
+//                                                               ^
+//
+// pkg/front_end/testcases/invalid_cast.dart:28:43: Error: The constructor returns type 'C' that isn't of expected type 'D'.
+//  - 'C' is from 'pkg/front_end/testcases/invalid_cast.dart'.
+//  - 'D' is from 'pkg/front_end/testcases/invalid_cast.dart'.
+// Change the type of the object being constructed or the context in which it is used.
+//   D g = new /*@error=InvalidCastNewExpr*/ C.nonFact();
+//                                           ^
+//
+// pkg/front_end/testcases/invalid_cast.dart:29:43: Error: The constructor returns type 'C' that isn't of expected type 'D'.
+//  - 'C' is from 'pkg/front_end/testcases/invalid_cast.dart'.
+//  - 'D' is from 'pkg/front_end/testcases/invalid_cast.dart'.
+// Change the type of the object being constructed or the context in which it is used.
+//   D h = new /*@error=InvalidCastNewExpr*/ C.nonFact2();
+//                                           ^
+//
+// pkg/front_end/testcases/invalid_cast.dart:31:45: Error: The static method has type 'void Function(int)' that isn't of expected type 'void Function(Object)'.
+//  - 'Object' is from 'dart:core'.
+// Change the type of the method or the context in which it is used.
+//       C. /*@error=InvalidCastStaticMethod*/ staticFunction;
+//                                             ^
+//
+// pkg/front_end/testcases/invalid_cast.dart:33:50: Error: The top level function has type 'void Function(int)' that isn't of expected type 'void Function(Object)'.
+//  - 'Object' is from 'dart:core'.
+// Change the type of the function or the context in which it is used.
+//       j = /*@error=InvalidCastTopLevelFunction*/ topLevelFunction;
+//                                                  ^
+//
+// pkg/front_end/testcases/invalid_cast.dart:34:65: Error: The local function has type 'void Function(int)' that isn't of expected type 'void Function(Object)'.
+//  - 'Object' is from 'dart:core'.
+// Change the type of the function or the context in which it is used.
+//   void Function(Object) k = /*@error=InvalidCastLocalFunction*/ localFunction;
+//                                                                 ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/invalid_type.dart.legacy.expect b/pkg/front_end/testcases/invalid_type.dart.legacy.expect
index ec2dd21..06c896f 100644
--- a/pkg/front_end/testcases/invalid_type.dart.legacy.expect
+++ b/pkg/front_end/testcases/invalid_type.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/invalid_type.dart:7:5: Error: Expected identifier, but got 'this'.
 //     this.bar();
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/invalid_type.dart:12:12: Warning: 'Missing' isn't a type.
 //   (null as Missing).bar();
 //            ^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/invalid_type.dart.legacy.transformed.expect b/pkg/front_end/testcases/invalid_type.dart.legacy.transformed.expect
index bc547fb..06c896f 100644
--- a/pkg/front_end/testcases/invalid_type.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/invalid_type.dart.legacy.transformed.expect
@@ -1,4 +1,15 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/invalid_type.dart:7:5: Error: Expected identifier, but got 'this'.
+//     this.bar();
+//     ^^^^
+//
+// pkg/front_end/testcases/invalid_type.dart:12:12: Warning: 'Missing' isn't a type.
+//   (null as Missing).bar();
+//            ^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/invalid_type.dart.strong.expect b/pkg/front_end/testcases/invalid_type.dart.strong.expect
index 072f0ee..3bd6201 100644
--- a/pkg/front_end/testcases/invalid_type.dart.strong.expect
+++ b/pkg/front_end/testcases/invalid_type.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/invalid_type.dart:7:5: Error: Expected identifier, but got 'this'.
 //     this.bar();
@@ -12,14 +14,7 @@
 // Try correcting the name to the name of an existing method, or defining a method named 'bar'.
 //   null.bar();
 //        ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/invalid_type.dart:12:12: Error: 'Missing' isn't a type.
-//   (null as Missing).bar();
-//            ^^^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/invocations.dart.strong.expect b/pkg/front_end/testcases/invocations.dart.strong.expect
index 9bfb838..ee55950 100644
--- a/pkg/front_end/testcases/invocations.dart.strong.expect
+++ b/pkg/front_end/testcases/invocations.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/invocations.dart:7:3: Error: Method not found: 'z'.
 //   z("Hello, World!");
@@ -35,8 +37,7 @@
 // pkg/front_end/testcases/invocations.dart:13:7: Error: This expression has type 'void' and can't be used.
 //       print("Hello, World!") +
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/invocations.dart.strong.transformed.expect b/pkg/front_end/testcases/invocations.dart.strong.transformed.expect
index 773afe1..ee55950 100644
--- a/pkg/front_end/testcases/invocations.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/invocations.dart.strong.transformed.expect
@@ -1,4 +1,43 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/invocations.dart:7:3: Error: Method not found: 'z'.
+//   z("Hello, World!");
+//   ^
+//
+// pkg/front_end/testcases/invocations.dart:8:3: Error: Getter not found: 'z'.
+//   z.print("Hello, World!");
+//   ^
+//
+// pkg/front_end/testcases/invocations.dart:9:3: Error: Getter not found: 'y'.
+//   y.z.print("Hello, World!");
+//   ^
+//
+// pkg/front_end/testcases/invocations.dart:10:3: Error: Getter not found: 'x'.
+//   x.y.z.print("Hello, World!");
+//   ^
+//
+// pkg/front_end/testcases/invocations.dart:14:7: Error: Method not found: 'z'.
+//       z("Hello, World!") +
+//       ^
+//
+// pkg/front_end/testcases/invocations.dart:15:7: Error: Getter not found: 'z'.
+//       z.print("Hello, World!") +
+//       ^
+//
+// pkg/front_end/testcases/invocations.dart:16:7: Error: Getter not found: 'y'.
+//       y.z.print("Hello, World!") +
+//       ^
+//
+// pkg/front_end/testcases/invocations.dart:17:7: Error: Getter not found: 'x'.
+//       x.y.z.print("Hello, World!");
+//       ^
+//
+// pkg/front_end/testcases/invocations.dart:13:7: Error: This expression has type 'void' and can't be used.
+//       print("Hello, World!") +
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/magic_const.dart.legacy.expect b/pkg/front_end/testcases/magic_const.dart.legacy.expect
index 36d6c67..78ce95a 100644
--- a/pkg/front_end/testcases/magic_const.dart.legacy.expect
+++ b/pkg/front_end/testcases/magic_const.dart.legacy.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/magic_const.dart:18:9: Error: Cannot invoke a non-'const' constructor where a const expression is expected.
 // Try using a constructor or factory that is 'const'.
 //   const NotConstant();
 //         ^^^^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/magic_const.dart.legacy.transformed.expect b/pkg/front_end/testcases/magic_const.dart.legacy.transformed.expect
index 9a97877..78ce95a 100644
--- a/pkg/front_end/testcases/magic_const.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/magic_const.dart.legacy.transformed.expect
@@ -1,4 +1,12 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/magic_const.dart:18:9: Error: Cannot invoke a non-'const' constructor where a const expression is expected.
+// Try using a constructor or factory that is 'const'.
+//   const NotConstant();
+//         ^^^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/magic_const.dart.strong.expect b/pkg/front_end/testcases/magic_const.dart.strong.expect
index 07f6812..e5aa39c 100644
--- a/pkg/front_end/testcases/magic_const.dart.strong.expect
+++ b/pkg/front_end/testcases/magic_const.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/magic_const.dart:18:9: Error: Cannot invoke a non-'const' constructor where a const expression is expected.
 // Try using a constructor or factory that is 'const'.
 //   const NotConstant();
 //         ^^^^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/magic_const.dart.strong.transformed.expect b/pkg/front_end/testcases/magic_const.dart.strong.transformed.expect
index c4404ef..e5aa39c 100644
--- a/pkg/front_end/testcases/magic_const.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/magic_const.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/magic_const.dart:18:9: Error: Cannot invoke a non-'const' constructor where a const expression is expected.
+// Try using a constructor or factory that is 'const'.
+//   const NotConstant();
+//         ^^^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/missing_constructor.dart.legacy.expect b/pkg/front_end/testcases/missing_constructor.dart.legacy.expect
index a886bd4..f6911cc 100644
--- a/pkg/front_end/testcases/missing_constructor.dart.legacy.expect
+++ b/pkg/front_end/testcases/missing_constructor.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/missing_constructor.dart:10:11: Warning: Superclass has no constructor named 'Super'.
 //   Sub() : super();
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/missing_constructor.dart:23:28: Warning: Superclass has no constructor named 'Super.foo'.
 //   MixinApplication.foo() : super.foo();
 //                            ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/missing_constructor.dart.legacy.transformed.expect b/pkg/front_end/testcases/missing_constructor.dart.legacy.transformed.expect
index 37a1c85..518277f 100644
--- a/pkg/front_end/testcases/missing_constructor.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/missing_constructor.dart.legacy.transformed.expect
@@ -1,4 +1,31 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/missing_constructor.dart:10:11: Warning: Superclass has no constructor named 'Super'.
+//   Sub() : super();
+//           ^^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:11:15: Warning: Superclass has no constructor named 'Super.foo'.
+//   Sub.foo() : super.foo();
+//               ^^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:15:15: Warning: Couldn't find constructor 'Bad'.
+//   Bad.foo() : this();
+//               ^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:16:15: Warning: Couldn't find constructor 'Bad.baz'.
+//   Bad.bar() : this.baz();
+//               ^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:22:24: Warning: Superclass has no constructor named 'Super'.
+//   MixinApplication() : super();
+//                        ^^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:23:28: Warning: Superclass has no constructor named 'Super.foo'.
+//   MixinApplication.foo() : super.foo();
+//                            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/missing_constructor.dart.strong.expect b/pkg/front_end/testcases/missing_constructor.dart.strong.expect
index 2102137d..171f082 100644
--- a/pkg/front_end/testcases/missing_constructor.dart.strong.expect
+++ b/pkg/front_end/testcases/missing_constructor.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/missing_constructor.dart:10:11: Error: Superclass has no constructor named 'Super'.
 //   Sub() : super();
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/missing_constructor.dart:23:28: Error: Superclass has no constructor named 'Super.foo'.
 //   MixinApplication.foo() : super.foo();
 //                            ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/missing_constructor.dart.strong.transformed.expect b/pkg/front_end/testcases/missing_constructor.dart.strong.transformed.expect
index 1b4681e..3c5ca61 100644
--- a/pkg/front_end/testcases/missing_constructor.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/missing_constructor.dart.strong.transformed.expect
@@ -1,4 +1,31 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/missing_constructor.dart:10:11: Error: Superclass has no constructor named 'Super'.
+//   Sub() : super();
+//           ^^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:11:15: Error: Superclass has no constructor named 'Super.foo'.
+//   Sub.foo() : super.foo();
+//               ^^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:15:15: Error: Couldn't find constructor 'Bad'.
+//   Bad.foo() : this();
+//               ^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:16:15: Error: Couldn't find constructor 'Bad.baz'.
+//   Bad.bar() : this.baz();
+//               ^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:22:24: Error: Superclass has no constructor named 'Super'.
+//   MixinApplication() : super();
+//                        ^^^^^
+//
+// pkg/front_end/testcases/missing_constructor.dart:23:28: Error: Superclass has no constructor named 'Super.foo'.
+//   MixinApplication.foo() : super.foo();
+//                            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/mixin_application_override.dart.legacy.expect b/pkg/front_end/testcases/mixin_application_override.dart.legacy.expect
index 52129f0..b5c4a61 100644
--- a/pkg/front_end/testcases/mixin_application_override.dart.legacy.expect
+++ b/pkg/front_end/testcases/mixin_application_override.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
 //   foo() {}
@@ -119,8 +121,7 @@
 // pkg/front_end/testcases/mixin_application_override.dart:39:7: Context: Override was introduced when the mixin 'M' was applied to 'S with M1, M2'.
 // class B2X extends S with M1, M2, M, MX {}
 //       ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/mixin_application_override.dart.legacy.transformed.expect b/pkg/front_end/testcases/mixin_application_override.dart.legacy.transformed.expect
index 381523a..c5a8827 100644
--- a/pkg/front_end/testcases/mixin_application_override.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/mixin_application_override.dart.legacy.transformed.expect
@@ -1,4 +1,127 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:21:7: Context: Override was introduced in the mixin application class 'A0'.
+// class A0 = S with M;
+//       ^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:22:7: Context: Override was introduced in the mixin application class 'A1'.
+// class A1 = S with M1, M;
+//       ^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:23:7: Context: Override was introduced in the mixin application class 'A2'.
+// class A2 = S with M1, M2, M;
+//       ^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:25:7: Context: Override was introduced when the mixin 'M' was applied to 'S'.
+// class A0X = S with M, MX;
+//       ^^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:26:7: Context: Override was introduced when the mixin 'M' was applied to 'S with M1'.
+// class A1X = S with M1, M, MX;
+//       ^^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:27:7: Context: Override was introduced when the mixin 'M' was applied to 'S with M1, M2'.
+// class A2X = S with M1, M2, M, MX;
+//       ^^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:29:7: Context: Override was introduced when the mixin 'M' was applied to 'S'.
+// class B0 extends S with M {}
+//       ^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:31:7: Context: Override was introduced when the mixin 'M' was applied to 'S with M1'.
+// class B1 extends S with M1, M {}
+//       ^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:33:7: Context: Override was introduced when the mixin 'M' was applied to 'S with M1, M2'.
+// class B2 extends S with M1, M2, M {}
+//       ^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:35:7: Context: Override was introduced when the mixin 'M' was applied to 'S'.
+// class B0X extends S with M, MX {}
+//       ^^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:37:7: Context: Override was introduced when the mixin 'M' was applied to 'S with M1'.
+// class B1X extends S with M1, M, MX {}
+//       ^^^
+//
+// pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
+//   foo() {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:8:3: Context: This is the overridden method ('foo').
+//   foo([x]) {}
+//   ^
+// pkg/front_end/testcases/mixin_application_override.dart:39:7: Context: Override was introduced when the mixin 'M' was applied to 'S with M1, M2'.
+// class B2X extends S with M1, M2, M, MX {}
+//       ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/mixin_application_override.dart.outline.expect b/pkg/front_end/testcases/mixin_application_override.dart.outline.expect
index 7d607e6..9983cfb 100644
--- a/pkg/front_end/testcases/mixin_application_override.dart.outline.expect
+++ b/pkg/front_end/testcases/mixin_application_override.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/mixin_application_override.dart:12:3: Warning: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
 //   foo() {}
@@ -119,8 +121,7 @@
 // pkg/front_end/testcases/mixin_application_override.dart:39:7: Context: Override was introduced when the mixin 'M' was applied to 'S with M1, M2'.
 // class B2X extends S with M1, M2, M, MX {}
 //       ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/mixin_application_override.dart.strong.expect b/pkg/front_end/testcases/mixin_application_override.dart.strong.expect
index c8c6a90..879c4c0 100644
--- a/pkg/front_end/testcases/mixin_application_override.dart.strong.expect
+++ b/pkg/front_end/testcases/mixin_application_override.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
 //   foo() {}
@@ -119,58 +121,7 @@
 // pkg/front_end/testcases/mixin_application_override.dart:39:7: Context: Override was introduced when the mixin 'M' was applied to 'S with M1, M2'.
 // class B2X extends S with M1, M2, M, MX {}
 //       ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-//
-// pkg/front_end/testcases/mixin_application_override.dart:12:3: Error: The method 'M.foo' has fewer positional arguments than those of overridden method 'S.foo'.
-//   foo() {}
-//   ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/mixin_conflicts.dart.legacy.expect b/pkg/front_end/testcases/mixin_conflicts.dart.legacy.expect
index d27c051..7c2bfa7 100644
--- a/pkg/front_end/testcases/mixin_conflicts.dart.legacy.expect
+++ b/pkg/front_end/testcases/mixin_conflicts.dart.legacy.expect
@@ -1,58 +1,35 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/mixin_conflicts.dart:22:7: Error: The non-abstract class 'N2' is missing implementations for these members:
-//  - M.foo
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-//
-// class N2 = Object with M2;
-//       ^^
-// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
-//   foo() {}
-//   ^^^
-//
-// pkg/front_end/testcases/mixin_conflicts.dart:29:7: Error: The non-abstract class 'C2' is missing implementations for these members:
-//  - M.foo
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-//
-// class C2 extends Object with M2 {}
-//       ^^
-// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
-//   foo() {}
-//   ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/mixin_conflicts.dart:22:7: Error: The non-abstract class 'N2' is missing implementations for these members:
-//  - M.foo
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class N2 = Object with M2;
-//       ^^
-//
-// pkg/front_end/testcases/mixin_conflicts.dart:29:7: Error: The non-abstract class 'C2' is missing implementations for these members:
-//  - M.foo
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class C2 extends Object with M2 {}
-//       ^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/mixin_conflicts.dart:22:7: Error: The non-abstract class 'N2' is missing implementations for these members:
+//  - M.foo
+// Try to either
+//  - provide an implementation,
+//  - inherit an implementation from a superclass or mixin,
+//  - mark the class as abstract, or
+//  - provide a 'noSuchMethod' implementation.
+//
+// class N2 = Object with M2;
+//       ^^
+// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
+//   foo() {}
+//   ^^^
+//
+// pkg/front_end/testcases/mixin_conflicts.dart:29:7: Error: The non-abstract class 'C2' is missing implementations for these members:
+//  - M.foo
+// Try to either
+//  - provide an implementation,
+//  - inherit an implementation from a superclass or mixin,
+//  - mark the class as abstract, or
+//  - provide a 'noSuchMethod' implementation.
+//
+// class C2 extends Object with M2 {}
+//       ^^
+// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
+//   foo() {}
+//   ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/mixin_conflicts.dart.legacy.transformed.expect b/pkg/front_end/testcases/mixin_conflicts.dart.legacy.transformed.expect
index 998839d..7ab1118 100644
--- a/pkg/front_end/testcases/mixin_conflicts.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/mixin_conflicts.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/mixin_conflicts.dart:22:7: Error: The non-abstract class 'N2' is missing implementations for these members:
 //  - M.foo
@@ -7,9 +9,12 @@
 //  - inherit an implementation from a superclass or mixin,
 //  - mark the class as abstract, or
 //  - provide a 'noSuchMethod' implementation.
-// 
+//
 // class N2 = Object with M2;
 //       ^^
+// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
+//   foo() {}
+//   ^^^
 //
 // pkg/front_end/testcases/mixin_conflicts.dart:29:7: Error: The non-abstract class 'C2' is missing implementations for these members:
 //  - M.foo
@@ -18,11 +23,13 @@
 //  - inherit an implementation from a superclass or mixin,
 //  - mark the class as abstract, or
 //  - provide a 'noSuchMethod' implementation.
-// 
+//
 // class C2 extends Object with M2 {}
 //       ^^
-
-library;
+// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
+//   foo() {}
+//   ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/mixin_conflicts.dart.outline.expect b/pkg/front_end/testcases/mixin_conflicts.dart.outline.expect
index 603394f..50f14af 100644
--- a/pkg/front_end/testcases/mixin_conflicts.dart.outline.expect
+++ b/pkg/front_end/testcases/mixin_conflicts.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/mixin_conflicts.dart:22:7: Error: The non-abstract class 'N2' is missing implementations for these members:
 //  - M.foo
@@ -27,8 +29,7 @@
 // pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
 //   foo() {}
 //   ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/mixin_conflicts.dart.strong.expect b/pkg/front_end/testcases/mixin_conflicts.dart.strong.expect
index d27c051..7c2bfa7 100644
--- a/pkg/front_end/testcases/mixin_conflicts.dart.strong.expect
+++ b/pkg/front_end/testcases/mixin_conflicts.dart.strong.expect
@@ -1,58 +1,35 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/mixin_conflicts.dart:22:7: Error: The non-abstract class 'N2' is missing implementations for these members:
-//  - M.foo
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-//
-// class N2 = Object with M2;
-//       ^^
-// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
-//   foo() {}
-//   ^^^
-//
-// pkg/front_end/testcases/mixin_conflicts.dart:29:7: Error: The non-abstract class 'C2' is missing implementations for these members:
-//  - M.foo
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-//
-// class C2 extends Object with M2 {}
-//       ^^
-// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
-//   foo() {}
-//   ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/mixin_conflicts.dart:22:7: Error: The non-abstract class 'N2' is missing implementations for these members:
-//  - M.foo
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class N2 = Object with M2;
-//       ^^
-//
-// pkg/front_end/testcases/mixin_conflicts.dart:29:7: Error: The non-abstract class 'C2' is missing implementations for these members:
-//  - M.foo
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class C2 extends Object with M2 {}
-//       ^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/mixin_conflicts.dart:22:7: Error: The non-abstract class 'N2' is missing implementations for these members:
+//  - M.foo
+// Try to either
+//  - provide an implementation,
+//  - inherit an implementation from a superclass or mixin,
+//  - mark the class as abstract, or
+//  - provide a 'noSuchMethod' implementation.
+//
+// class N2 = Object with M2;
+//       ^^
+// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
+//   foo() {}
+//   ^^^
+//
+// pkg/front_end/testcases/mixin_conflicts.dart:29:7: Error: The non-abstract class 'C2' is missing implementations for these members:
+//  - M.foo
+// Try to either
+//  - provide an implementation,
+//  - inherit an implementation from a superclass or mixin,
+//  - mark the class as abstract, or
+//  - provide a 'noSuchMethod' implementation.
+//
+// class C2 extends Object with M2 {}
+//       ^^
+// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
+//   foo() {}
+//   ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/mixin_conflicts.dart.strong.transformed.expect b/pkg/front_end/testcases/mixin_conflicts.dart.strong.transformed.expect
index 998839d..7ab1118 100644
--- a/pkg/front_end/testcases/mixin_conflicts.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/mixin_conflicts.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/mixin_conflicts.dart:22:7: Error: The non-abstract class 'N2' is missing implementations for these members:
 //  - M.foo
@@ -7,9 +9,12 @@
 //  - inherit an implementation from a superclass or mixin,
 //  - mark the class as abstract, or
 //  - provide a 'noSuchMethod' implementation.
-// 
+//
 // class N2 = Object with M2;
 //       ^^
+// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
+//   foo() {}
+//   ^^^
 //
 // pkg/front_end/testcases/mixin_conflicts.dart:29:7: Error: The non-abstract class 'C2' is missing implementations for these members:
 //  - M.foo
@@ -18,11 +23,13 @@
 //  - inherit an implementation from a superclass or mixin,
 //  - mark the class as abstract, or
 //  - provide a 'noSuchMethod' implementation.
-// 
+//
 // class C2 extends Object with M2 {}
 //       ^^
-
-library;
+// pkg/front_end/testcases/mixin_conflicts.dart:7:3: Context: 'M.foo' is defined here.
+//   foo() {}
+//   ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/named_function_scope.dart.legacy.expect b/pkg/front_end/testcases/named_function_scope.dart.legacy.expect
index 434f796..5bc6572 100644
--- a/pkg/front_end/testcases/named_function_scope.dart.legacy.expect
+++ b/pkg/front_end/testcases/named_function_scope.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/named_function_scope.dart:28:48: Error: A function expression can't have a name.
 //     var x = /*@error=NamedFunctionExpression*/ T() {};
@@ -78,22 +80,7 @@
 // pkg/front_end/testcases/named_function_scope.dart:83:32: Warning: 'T' isn't a type.
 //     void T(/*@error=NotAType*/ T t) {}
 //                                ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/named_function_scope.dart:28:48: Error: A function expression can't have a name.
-//     var x = /*@error=NamedFunctionExpression*/ T() {};
-//                                                ^
-//
-// pkg/front_end/testcases/named_function_scope.dart:48:9: Error: A function expression can't have a name.
-//         T() {};
-//         ^
-//
-// pkg/front_end/testcases/named_function_scope.dart:62:9: Error: A function expression can't have a name.
-//         T< /*@context=DuplicatedDeclarationCause*/ T>() {};
-//         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/named_function_scope.dart.legacy.transformed.expect b/pkg/front_end/testcases/named_function_scope.dart.legacy.transformed.expect
index 5a63c13..5bc6572 100644
--- a/pkg/front_end/testcases/named_function_scope.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/named_function_scope.dart.legacy.transformed.expect
@@ -1,18 +1,86 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/named_function_scope.dart:28:48: Error: A function expression can't have a name.
 //     var x = /*@error=NamedFunctionExpression*/ T() {};
 //                                                ^
 //
+// pkg/front_end/testcases/named_function_scope.dart:33:49: Error: Can't declare 'V' because it was already used in this scope.
+//     var /*@error=DuplicatedNamePreviouslyUsed*/ V;
+//                                                 ^
+// pkg/front_end/testcases/named_function_scope.dart:31:52: Context: Previous use of 'V'.
+//     /*@context=DuplicatedNamePreviouslyUsedCause*/ V  v;
+//                                                    ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:38:49: Error: Can't declare 'V' because it was already used in this scope.
+//     var /*@error=DuplicatedNamePreviouslyUsed*/ V = null;
+//                                                 ^
+// pkg/front_end/testcases/named_function_scope.dart:36:52: Context: Previous use of 'V'.
+//     /*@context=DuplicatedNamePreviouslyUsedCause*/ V  v;
+//                                                    ^
+//
 // pkg/front_end/testcases/named_function_scope.dart:48:9: Error: A function expression can't have a name.
 //         T() {};
 //         ^
 //
+// pkg/front_end/testcases/named_function_scope.dart:48:9: Error: Can't declare 'T' because it was already used in this scope.
+//         T() {};
+//         ^
+// pkg/front_end/testcases/named_function_scope.dart:45:9: Context: Previous use of 'T'.
+//         T
+//         ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:54:47: Error: Can't declare 'V' because it was already used in this scope.
+//     V /*@error=DuplicatedNamePreviouslyUsed*/ V;
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:54:5: Context: Previous use of 'V'.
+//     V /*@error=DuplicatedNamePreviouslyUsed*/ V;
+//     ^
+//
 // pkg/front_end/testcases/named_function_scope.dart:62:9: Error: A function expression can't have a name.
 //         T< /*@context=DuplicatedDeclarationCause*/ T>() {};
 //         ^
-
-library;
+//
+// pkg/front_end/testcases/named_function_scope.dart:62:9: Error: 'T' is already declared in this scope.
+//         T< /*@context=DuplicatedDeclarationCause*/ T>() {};
+//         ^
+// pkg/front_end/testcases/named_function_scope.dart:62:52: Context: Previous declaration of 'T'.
+//         T< /*@context=DuplicatedDeclarationCause*/ T>() {};
+//                                                    ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:67:47: Error: Can't declare 'T' because it was already used in this scope.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T() {}
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:66:5: Context: Previous use of 'T'.
+//     T t;
+//     ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:71:47: Error: Can't declare 'T' because it was already used in this scope.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T() {}
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:71:5: Context: Previous use of 'T'.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T() {}
+//     ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:76:47: Error: Can't declare 'T' because it was already used in this scope.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T(T t) {}
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:75:5: Context: Previous use of 'T'.
+//     T t;
+//     ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:80:47: Error: Can't declare 'T' because it was already used in this scope.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T(T t) {}
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:80:5: Context: Previous use of 'T'.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T(T t) {}
+//     ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:83:32: Warning: 'T' isn't a type.
+//     void T(/*@error=NotAType*/ T t) {}
+//                                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/named_function_scope.dart.strong.expect b/pkg/front_end/testcases/named_function_scope.dart.strong.expect
index 4a5f48d..d898d98 100644
--- a/pkg/front_end/testcases/named_function_scope.dart.strong.expect
+++ b/pkg/front_end/testcases/named_function_scope.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/named_function_scope.dart:28:48: Error: A function expression can't have a name.
 //     var x = /*@error=NamedFunctionExpression*/ T() {};
@@ -78,26 +80,7 @@
 // pkg/front_end/testcases/named_function_scope.dart:83:32: Error: 'T' isn't a type.
 //     void T(/*@error=NotAType*/ T t) {}
 //                                ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/named_function_scope.dart:28:48: Error: A function expression can't have a name.
-//     var x = /*@error=NamedFunctionExpression*/ T() {};
-//                                                ^
-//
-// pkg/front_end/testcases/named_function_scope.dart:48:9: Error: A function expression can't have a name.
-//         T() {};
-//         ^
-//
-// pkg/front_end/testcases/named_function_scope.dart:62:9: Error: A function expression can't have a name.
-//         T< /*@context=DuplicatedDeclarationCause*/ T>() {};
-//         ^
-//
-// pkg/front_end/testcases/named_function_scope.dart:83:32: Error: 'T' isn't a type.
-//     void T(/*@error=NotAType*/ T t) {}
-//                                ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/named_function_scope.dart.strong.transformed.expect b/pkg/front_end/testcases/named_function_scope.dart.strong.transformed.expect
index d3e6f09..d898d98 100644
--- a/pkg/front_end/testcases/named_function_scope.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/named_function_scope.dart.strong.transformed.expect
@@ -1,22 +1,86 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/named_function_scope.dart:28:48: Error: A function expression can't have a name.
 //     var x = /*@error=NamedFunctionExpression*/ T() {};
 //                                                ^
 //
+// pkg/front_end/testcases/named_function_scope.dart:33:49: Error: Can't declare 'V' because it was already used in this scope.
+//     var /*@error=DuplicatedNamePreviouslyUsed*/ V;
+//                                                 ^
+// pkg/front_end/testcases/named_function_scope.dart:31:52: Context: Previous use of 'V'.
+//     /*@context=DuplicatedNamePreviouslyUsedCause*/ V  v;
+//                                                    ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:38:49: Error: Can't declare 'V' because it was already used in this scope.
+//     var /*@error=DuplicatedNamePreviouslyUsed*/ V = null;
+//                                                 ^
+// pkg/front_end/testcases/named_function_scope.dart:36:52: Context: Previous use of 'V'.
+//     /*@context=DuplicatedNamePreviouslyUsedCause*/ V  v;
+//                                                    ^
+//
 // pkg/front_end/testcases/named_function_scope.dart:48:9: Error: A function expression can't have a name.
 //         T() {};
 //         ^
 //
+// pkg/front_end/testcases/named_function_scope.dart:48:9: Error: Can't declare 'T' because it was already used in this scope.
+//         T() {};
+//         ^
+// pkg/front_end/testcases/named_function_scope.dart:45:9: Context: Previous use of 'T'.
+//         T
+//         ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:54:47: Error: Can't declare 'V' because it was already used in this scope.
+//     V /*@error=DuplicatedNamePreviouslyUsed*/ V;
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:54:5: Context: Previous use of 'V'.
+//     V /*@error=DuplicatedNamePreviouslyUsed*/ V;
+//     ^
+//
 // pkg/front_end/testcases/named_function_scope.dart:62:9: Error: A function expression can't have a name.
 //         T< /*@context=DuplicatedDeclarationCause*/ T>() {};
 //         ^
 //
+// pkg/front_end/testcases/named_function_scope.dart:62:9: Error: 'T' is already declared in this scope.
+//         T< /*@context=DuplicatedDeclarationCause*/ T>() {};
+//         ^
+// pkg/front_end/testcases/named_function_scope.dart:62:52: Context: Previous declaration of 'T'.
+//         T< /*@context=DuplicatedDeclarationCause*/ T>() {};
+//                                                    ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:67:47: Error: Can't declare 'T' because it was already used in this scope.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T() {}
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:66:5: Context: Previous use of 'T'.
+//     T t;
+//     ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:71:47: Error: Can't declare 'T' because it was already used in this scope.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T() {}
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:71:5: Context: Previous use of 'T'.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T() {}
+//     ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:76:47: Error: Can't declare 'T' because it was already used in this scope.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T(T t) {}
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:75:5: Context: Previous use of 'T'.
+//     T t;
+//     ^
+//
+// pkg/front_end/testcases/named_function_scope.dart:80:47: Error: Can't declare 'T' because it was already used in this scope.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T(T t) {}
+//                                               ^
+// pkg/front_end/testcases/named_function_scope.dart:80:5: Context: Previous use of 'T'.
+//     T /*@error=DuplicatedNamePreviouslyUsed*/ T(T t) {}
+//     ^
+//
 // pkg/front_end/testcases/named_function_scope.dart:83:32: Error: 'T' isn't a type.
 //     void T(/*@error=NotAType*/ T t) {}
 //                                ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.legacy.expect b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.legacy.expect
index 6742c9b..8fef0c1 100644
--- a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.legacy.expect
+++ b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:12:12: Error: 'foo' is already declared in this scope.
 //   void set foo(int x);
@@ -6,14 +8,7 @@
 // pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:10:8: Context: Previous declaration of 'foo'.
 //   void foo(int x) {}
 //        ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:12:12: Error: 'foo' is already declared in this scope.
-//   void set foo(int x);
-//            ^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.legacy.transformed.expect b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.legacy.transformed.expect
index e9e7677..8fef0c1 100644
--- a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.legacy.transformed.expect
@@ -1,10 +1,14 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:12:12: Error: 'foo' is already declared in this scope.
 //   void set foo(int x);
 //            ^^^
-
-library;
+// pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:10:8: Context: Previous declaration of 'foo'.
+//   void foo(int x) {}
+//        ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.outline.expect b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.outline.expect
index d8c8b38..f87c303 100644
--- a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.outline.expect
+++ b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:12:12: Error: 'foo' is already declared in this scope.
 //   void set foo(int x);
@@ -6,8 +8,7 @@
 // pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:10:8: Context: Previous declaration of 'foo'.
 //   void foo(int x) {}
 //        ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.strong.expect b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.strong.expect
index 6742c9b..8fef0c1 100644
--- a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.strong.expect
+++ b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:12:12: Error: 'foo' is already declared in this scope.
 //   void set foo(int x);
@@ -6,14 +8,7 @@
 // pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:10:8: Context: Previous declaration of 'foo'.
 //   void foo(int x) {}
 //        ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:12:12: Error: 'foo' is already declared in this scope.
-//   void set foo(int x);
-//            ^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.strong.transformed.expect b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.strong.transformed.expect
index e9e7677..8fef0c1 100644
--- a/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart.strong.transformed.expect
@@ -1,10 +1,14 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:12:12: Error: 'foo' is already declared in this scope.
 //   void set foo(int x);
 //            ^^^
-
-library;
+// pkg/front_end/testcases/no_such_method_forwarders/setter_not_shadowed_by_method.dart:10:8: Context: Previous declaration of 'foo'.
+//   void foo(int x) {}
+//        ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/optional.dart.strong.expect b/pkg/front_end/testcases/optional.dart.strong.expect
index 2cb7a7c..d74b9fc 100644
--- a/pkg/front_end/testcases/optional.dart.strong.expect
+++ b/pkg/front_end/testcases/optional.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/optional.dart:47:21: Error: The argument type 'InvalidListener' can't be assigned to the parameter type 'Listener'.
 //  - 'InvalidListener' is from 'pkg/front_end/testcases/optional.dart'.
@@ -24,28 +26,7 @@
 // Try removing the extra positional arguments.
 //   var nothing4 = extern.externalMethod(1, 2, 3, 4);
 //                                       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/optional.dart:49:28: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing1 = foo.method();
-//                            ^
-//
-// pkg/front_end/testcases/optional.dart:50:28: Error: Too many positional arguments: 3 allowed, but 4 found.
-// Try removing the extra positional arguments.
-//   var nothing2 = foo.method(1, 2, 3, 4);
-//                            ^
-//
-// pkg/front_end/testcases/optional.dart:51:39: Error: Too few positional arguments: 1 required, 0 given.
-//   var nothing3 = extern.externalMethod();
-//                                       ^
-//
-// pkg/front_end/testcases/optional.dart:52:39: Error: Too many positional arguments: 3 allowed, but 4 found.
-// Try removing the extra positional arguments.
-//   var nothing4 = extern.externalMethod(1, 2, 3, 4);
-//                                       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/override_check_accessor_after_inference.dart.strong.expect b/pkg/front_end/testcases/override_check_accessor_after_inference.dart.strong.expect
index 12a28da..e11b390 100644
--- a/pkg/front_end/testcases/override_check_accessor_after_inference.dart.strong.expect
+++ b/pkg/front_end/testcases/override_check_accessor_after_inference.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/override_check_accessor_after_inference.dart:28:51: Error: The return type of the method 'F.y' is 'A', which does not match the return type of the overridden method, 'B'.
 //  - 'A' is from 'pkg/front_end/testcases/override_check_accessor_after_inference.dart'.
@@ -19,24 +21,7 @@
 // pkg/front_end/testcases/override_check_accessor_after_inference.dart:17:12: Context: This is the overridden method ('x').
 //   void set x(value) {} // Inferred type: A
 //            ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/override_check_accessor_after_inference.dart:28:51: Error: The return type of the method 'F.y' is 'A', which does not match the return type of the overridden method, 'B'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_accessor_after_inference.dart'.
-//  - 'B' is from 'pkg/front_end/testcases/override_check_accessor_after_inference.dart'.
-// Change to a subtype of 'B'.
-//   A get /*@error=OverrideTypeMismatchReturnType*/ y => null;
-//                                                   ^
-//
-// pkg/front_end/testcases/override_check_accessor_after_inference.dart:27:57: Error: The parameter 'value' of the method 'F.x' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'B' is from 'pkg/front_end/testcases/override_check_accessor_after_inference.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_accessor_after_inference.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//   void set x(B /*@error=OverrideTypeMismatchParameter*/ value) {}
-//                                                         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/override_check_accessor_basic.dart.strong.expect b/pkg/front_end/testcases/override_check_accessor_basic.dart.strong.expect
index edd9a2f..055f4f6 100644
--- a/pkg/front_end/testcases/override_check_accessor_basic.dart.strong.expect
+++ b/pkg/front_end/testcases/override_check_accessor_basic.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/override_check_accessor_basic.dart:23:56: Error: The return type of the method 'E.y' is 'Object', which does not match the return type of the overridden method, 'A'.
 //  - 'Object' is from 'dart:core'.
@@ -19,24 +21,7 @@
 // pkg/front_end/testcases/override_check_accessor_basic.dart:12:12: Context: This is the overridden method ('x').
 //   void set x(A value) {}
 //            ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/override_check_accessor_basic.dart:23:56: Error: The return type of the method 'E.y' is 'Object', which does not match the return type of the overridden method, 'A'.
-//  - 'Object' is from 'dart:core'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_accessor_basic.dart'.
-// Change to a subtype of 'A'.
-//   Object get /*@error=OverrideTypeMismatchReturnType*/ y => null;
-//                                                        ^
-//
-// pkg/front_end/testcases/override_check_accessor_basic.dart:22:57: Error: The parameter 'value' of the method 'E.x' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'B' is from 'pkg/front_end/testcases/override_check_accessor_basic.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_accessor_basic.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//   void set x(B /*@error=OverrideTypeMismatchParameter*/ value) {}
-//                                                         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart.strong.expect b/pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart.strong.expect
index 4481746..5fa7ead 100644
--- a/pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart.strong.expect
+++ b/pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart:25:50: Error: The parameter 'value' of the method 'D.x4' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
 //  - 'B' is from 'pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart'.
@@ -18,23 +20,7 @@
 // pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart:16:12: Context: This is the overridden method ('x5').
 //   void set x5(covariant A value) {}
 //            ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart:25:50: Error: The parameter 'value' of the method 'D.x4' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'B' is from 'pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//       B /*@error=OverrideTypeMismatchParameter*/ value) {} // Not covariant
-//                                                  ^
-//
-// pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart:27:65: Error: The parameter 'value' of the method 'D.x5' has type 'String', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_accessor_with_covariant_modifier.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//       covariant String /*@error=OverrideTypeMismatchParameter*/ value) {}
-//                                                                 ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/override_check_after_inference.dart.strong.expect b/pkg/front_end/testcases/override_check_after_inference.dart.strong.expect
index d99ce0b..5e5e5ac 100644
--- a/pkg/front_end/testcases/override_check_after_inference.dart.strong.expect
+++ b/pkg/front_end/testcases/override_check_after_inference.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/override_check_after_inference.dart:24:53: Error: The parameter 'x' of the method 'F.f' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
 //  - 'B' is from 'pkg/front_end/testcases/override_check_after_inference.dart'.
@@ -9,17 +11,7 @@
 // pkg/front_end/testcases/override_check_after_inference.dart:16:8: Context: This is the overridden method ('f').
 //   void f(x) {} // Inferred type: (A) -> void
 //        ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/override_check_after_inference.dart:24:53: Error: The parameter 'x' of the method 'F.f' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'B' is from 'pkg/front_end/testcases/override_check_after_inference.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_after_inference.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//   void f(B /*@error=OverrideTypeMismatchParameter*/ x) {}
-//                                                     ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/override_check_basic.dart.strong.expect b/pkg/front_end/testcases/override_check_basic.dart.strong.expect
index c30602c..7810d9b 100644
--- a/pkg/front_end/testcases/override_check_basic.dart.strong.expect
+++ b/pkg/front_end/testcases/override_check_basic.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/override_check_basic.dart:29:52: Error: The return type of the method 'E.f4' is 'Object', which does not match the return type of the overridden method, 'A'.
 //  - 'Object' is from 'dart:core'.
@@ -39,38 +41,7 @@
 // pkg/front_end/testcases/override_check_basic.dart:13:8: Context: This is the overridden method ('f2').
 //   void f2([A x]) {}
 //        ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/override_check_basic.dart:29:52: Error: The return type of the method 'E.f4' is 'Object', which does not match the return type of the overridden method, 'A'.
-//  - 'Object' is from 'dart:core'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_basic.dart'.
-// Change to a subtype of 'A'.
-//   Object /*@error=OverrideTypeMismatchReturnType*/ f4() {}
-//                                                    ^
-//
-// pkg/front_end/testcases/override_check_basic.dart:28:55: Error: The parameter 'x' of the method 'E.f3' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'B' is from 'pkg/front_end/testcases/override_check_basic.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_basic.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//   void f3({B /*@error=OverrideTypeMismatchParameter*/ x}) {}
-//                                                       ^
-//
-// pkg/front_end/testcases/override_check_basic.dart:26:54: Error: The parameter 'x' of the method 'E.f1' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'B' is from 'pkg/front_end/testcases/override_check_basic.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_basic.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//   void f1(B /*@error=OverrideTypeMismatchParameter*/ x) {}
-//                                                      ^
-//
-// pkg/front_end/testcases/override_check_basic.dart:27:55: Error: The parameter 'x' of the method 'E.f2' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'B' is from 'pkg/front_end/testcases/override_check_basic.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_basic.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//   void f2([B /*@error=OverrideTypeMismatchParameter*/ x]) {}
-//                                                       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/override_check_with_covariant_modifier.dart.strong.expect b/pkg/front_end/testcases/override_check_with_covariant_modifier.dart.strong.expect
index fc5cda4..96fcfd3 100644
--- a/pkg/front_end/testcases/override_check_with_covariant_modifier.dart.strong.expect
+++ b/pkg/front_end/testcases/override_check_with_covariant_modifier.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/override_check_with_covariant_modifier.dart:25:69: Error: The parameter 'x' of the method 'D.f5' has type 'String', which does not match the corresponding type in the overridden method, 'A'.
 //  - 'A' is from 'pkg/front_end/testcases/override_check_with_covariant_modifier.dart'.
@@ -18,23 +20,7 @@
 // pkg/front_end/testcases/override_check_with_covariant_modifier.dart:15:8: Context: This is the overridden method ('f4').
 //   void f4(A x) {}
 //        ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/override_check_with_covariant_modifier.dart:25:69: Error: The parameter 'x' of the method 'D.f5' has type 'String', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_with_covariant_modifier.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//   void f5(covariant String /*@error=OverrideTypeMismatchParameter*/ x) {}
-//                                                                     ^
-//
-// pkg/front_end/testcases/override_check_with_covariant_modifier.dart:24:54: Error: The parameter 'x' of the method 'D.f4' has type 'B', which does not match the corresponding type in the overridden method, 'A'.
-//  - 'B' is from 'pkg/front_end/testcases/override_check_with_covariant_modifier.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/override_check_with_covariant_modifier.dart'.
-// Change to a supertype of 'A', or, for a covariant parameter, a subtype.
-//   void f4(B /*@error=OverrideTypeMismatchParameter*/ x) {} // Not covariant
-//                                                      ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/qualified.dart.legacy.expect b/pkg/front_end/testcases/qualified.dart.legacy.expect
index a54701c..364f09e 100644
--- a/pkg/front_end/testcases/qualified.dart.legacy.expect
+++ b/pkg/front_end/testcases/qualified.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test.qualified.main;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/qualified.dart:13:11: Error: The name of a constructor must match the name of the enclosing class.
 //   factory WrongName() {}
@@ -18,22 +20,7 @@
 // pkg/front_end/testcases/qualified.dart:18:7: Error: The type 'lib.VoidFunction' can't be used as supertype.
 // class IllegalSupertype extends lib.VoidFunction {}
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/qualified.dart:13:11: Error: The name of a constructor must match the name of the enclosing class.
-//   factory WrongName() {}
-//           ^^^^^^^^^
-//
-// pkg/front_end/testcases/qualified.dart:11:19: Error: Type 'lib.Missing' not found.
-// class Bad extends lib.Missing {
-//                   ^^^^^^^^^^^
-//
-// pkg/front_end/testcases/qualified.dart:18:7: Error: The type 'lib.VoidFunction' can't be used as supertype.
-// class IllegalSupertype extends lib.VoidFunction {}
-//       ^
-
-library test.qualified.main;
 import self as self;
 import "dart:core" as core;
 import "./qualified_lib.dart" as lib;
diff --git a/pkg/front_end/testcases/qualified.dart.legacy.transformed.expect b/pkg/front_end/testcases/qualified.dart.legacy.transformed.expect
index 20d9d18..8f3fbe5 100644
--- a/pkg/front_end/testcases/qualified.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/qualified.dart.legacy.transformed.expect
@@ -1,8 +1,17 @@
-// Unhandled errors:
+library test.qualified.main;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/qualified.dart:13:11: Error: The name of a constructor must match the name of the enclosing class.
 //   factory WrongName() {}
 //           ^^^^^^^^^
+// pkg/front_end/testcases/qualified.dart:11:7: Context: The name of the enclosing class is 'Bad'.
+// class Bad extends lib.Missing {
+//       ^^^
+//
+// pkg/front_end/testcases/qualified.dart:12:3: Warning: Type 'lib.Missing' not found.
+//   lib.Missing method() {}
+//   ^^^^^^^^^^^
 //
 // pkg/front_end/testcases/qualified.dart:11:19: Error: Type 'lib.Missing' not found.
 // class Bad extends lib.Missing {
@@ -11,8 +20,7 @@
 // pkg/front_end/testcases/qualified.dart:18:7: Error: The type 'lib.VoidFunction' can't be used as supertype.
 // class IllegalSupertype extends lib.VoidFunction {}
 //       ^
-
-library test.qualified.main;
+//
 import self as self;
 import "dart:core" as core;
 import "./qualified_lib.dart" as lib;
diff --git a/pkg/front_end/testcases/qualified.dart.outline.expect b/pkg/front_end/testcases/qualified.dart.outline.expect
index fb0b74d..6125de5 100644
--- a/pkg/front_end/testcases/qualified.dart.outline.expect
+++ b/pkg/front_end/testcases/qualified.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test.qualified.main;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/qualified.dart:13:11: Error: The name of a constructor must match the name of the enclosing class.
 //   factory WrongName() {}
@@ -18,8 +20,7 @@
 // pkg/front_end/testcases/qualified.dart:18:7: Error: The type 'lib.VoidFunction' can't be used as supertype.
 // class IllegalSupertype extends lib.VoidFunction {}
 //       ^
-
-library test.qualified.main;
+//
 import self as self;
 import "dart:core" as core;
 import "./qualified_lib.dart" as lib;
diff --git a/pkg/front_end/testcases/qualified.dart.strong.expect b/pkg/front_end/testcases/qualified.dart.strong.expect
index 4ad22bd..396029a 100644
--- a/pkg/front_end/testcases/qualified.dart.strong.expect
+++ b/pkg/front_end/testcases/qualified.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test.qualified.main;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/qualified.dart:13:11: Error: The name of a constructor must match the name of the enclosing class.
 //   factory WrongName() {}
@@ -18,26 +20,7 @@
 // pkg/front_end/testcases/qualified.dart:18:7: Error: The type 'lib.VoidFunction' can't be used as supertype.
 // class IllegalSupertype extends lib.VoidFunction {}
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/qualified.dart:13:11: Error: The name of a constructor must match the name of the enclosing class.
-//   factory WrongName() {}
-//           ^^^^^^^^^
-//
-// pkg/front_end/testcases/qualified.dart:12:3: Error: Type 'lib.Missing' not found.
-//   lib.Missing method() {}
-//   ^^^^^^^^^^^
-//
-// pkg/front_end/testcases/qualified.dart:11:19: Error: Type 'lib.Missing' not found.
-// class Bad extends lib.Missing {
-//                   ^^^^^^^^^^^
-//
-// pkg/front_end/testcases/qualified.dart:18:7: Error: The type 'lib.VoidFunction' can't be used as supertype.
-// class IllegalSupertype extends lib.VoidFunction {}
-//       ^
-
-library test.qualified.main;
 import self as self;
 import "dart:core" as core;
 import "./qualified_lib.dart" as lib;
diff --git a/pkg/front_end/testcases/qualified.dart.strong.transformed.expect b/pkg/front_end/testcases/qualified.dart.strong.transformed.expect
index 937b2a4..d04da4e 100644
--- a/pkg/front_end/testcases/qualified.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/qualified.dart.strong.transformed.expect
@@ -1,8 +1,13 @@
-// Unhandled errors:
+library test.qualified.main;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/qualified.dart:13:11: Error: The name of a constructor must match the name of the enclosing class.
 //   factory WrongName() {}
 //           ^^^^^^^^^
+// pkg/front_end/testcases/qualified.dart:11:7: Context: The name of the enclosing class is 'Bad'.
+// class Bad extends lib.Missing {
+//       ^^^
 //
 // pkg/front_end/testcases/qualified.dart:12:3: Error: Type 'lib.Missing' not found.
 //   lib.Missing method() {}
@@ -15,8 +20,7 @@
 // pkg/front_end/testcases/qualified.dart:18:7: Error: The type 'lib.VoidFunction' can't be used as supertype.
 // class IllegalSupertype extends lib.VoidFunction {}
 //       ^
-
-library test.qualified.main;
+//
 import self as self;
 import "dart:core" as core;
 import "./qualified_lib.dart" as lib;
diff --git a/pkg/front_end/testcases/rasta/abstract_constructor.dart.strong.expect b/pkg/front_end/testcases/rasta/abstract_constructor.dart.strong.expect
index f288f84..32a8cd2 100644
--- a/pkg/front_end/testcases/rasta/abstract_constructor.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/abstract_constructor.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/abstract_constructor.dart:8:7: Error: The class 'C' is abstract and can't be instantiated.
-//   new C();
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/abstract_constructor.dart:8:7: Error: The class 'C' is abstract and can't be instantiated.
-//   new C();
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/abstract_constructor.dart:8:7: Error: The class 'C' is abstract and can't be instantiated.
+//   new C();
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/abstract_constructor.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/abstract_constructor.dart.strong.transformed.expect
index e2f40b5..32a8cd2 100644
--- a/pkg/front_end/testcases/rasta/abstract_constructor.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/abstract_constructor.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/abstract_constructor.dart:8:7: Error: The class 'C' is abstract and can't be instantiated.
 //   new C();
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_constructor_redirection.dart.strong.expect b/pkg/front_end/testcases/rasta/bad_constructor_redirection.dart.strong.expect
index dca2096..cfe717a 100644
--- a/pkg/front_end/testcases/rasta/bad_constructor_redirection.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/bad_constructor_redirection.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_constructor_redirection.dart:6:21: Error: Too many positional arguments: 0 allowed, but 1 found.
 // Try removing the extra positional arguments.
 //   const C() : this.x(1);
 //                     ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_constructor_redirection.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/bad_constructor_redirection.dart.strong.transformed.expect
index 34a5b09..cfe717a 100644
--- a/pkg/front_end/testcases/rasta/bad_constructor_redirection.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_constructor_redirection.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/bad_constructor_redirection.dart:6:21: Error: Too many positional arguments: 0 allowed, but 1 found.
+// Try removing the extra positional arguments.
+//   const C() : this.x(1);
+//                     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_continue.dart.strong.expect b/pkg/front_end/testcases/rasta/bad_continue.dart.strong.expect
index 5ceeb3a..755a3f3 100644
--- a/pkg/front_end/testcases/rasta/bad_continue.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/bad_continue.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_continue.dart:6:3: Error: A continue statement can't be used outside of a loop or switch statement.
 // Try removing the continue statement.
@@ -14,20 +16,7 @@
 // Try removing the continue statement.
 //   label: continue label;
 //          ^^^^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/bad_continue.dart:6:3: Error: A continue statement can't be used outside of a loop or switch statement.
-// Try removing the continue statement.
-//   continue here;
-//   ^^^^^^^^
-//
-// pkg/front_end/testcases/rasta/bad_continue.dart:7:10: Error: A continue statement can't be used outside of a loop or switch statement.
-// Try removing the continue statement.
-//   label: continue label;
-//          ^^^^^^^^
-
-library;
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/bad_continue.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/bad_continue.dart.strong.transformed.expect
index 4d870d0..755a3f3 100644
--- a/pkg/front_end/testcases/rasta/bad_continue.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_continue.dart.strong.transformed.expect
@@ -1,16 +1,22 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_continue.dart:6:3: Error: A continue statement can't be used outside of a loop or switch statement.
 // Try removing the continue statement.
 //   continue here;
 //   ^^^^^^^^
 //
+// pkg/front_end/testcases/rasta/bad_continue.dart:6:12: Error: Can't find label 'here'.
+// Try defining the label, or correcting the name to match an existing label.
+//   continue here;
+//            ^
+//
 // pkg/front_end/testcases/rasta/bad_continue.dart:7:10: Error: A continue statement can't be used outside of a loop or switch statement.
 // Try removing the continue statement.
 //   label: continue label;
 //          ^^^^^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.legacy.expect b/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.legacy.expect
index 627bb4bb..6d07372 100644
--- a/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart:10:20: Warning: Too few positional arguments: 1 required, 0 given.
 //   const B() : super();
 //                    ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.legacy.transformed.expect
index 145398b..6d07372 100644
--- a/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart:10:20: Warning: Too few positional arguments: 1 required, 0 given.
+//   const B() : super();
+//                    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.strong.expect b/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.strong.expect
index 94e3c44..122893d 100644
--- a/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart:10:20: Error: Too few positional arguments: 1 required, 0 given.
 //   const B() : super();
 //                    ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.strong.transformed.expect
index 145398b..122893d 100644
--- a/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/bad_explicit_super_constructor.dart:10:20: Error: Too few positional arguments: 1 required, 0 given.
+//   const B() : super();
+//                    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.legacy.expect b/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.legacy.expect
index 815d322..5f6b84a 100644
--- a/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart:6:10: Error: 'x' isn't an instance field of this class.
 //   A(this.x);
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart:10:9: Error: The superclass, 'A', has no unnamed constructor that takes no arguments.
 //   const B();
 //         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.legacy.transformed.expect
index e218a4f..5f6b84a 100644
--- a/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.legacy.transformed.expect
@@ -1,4 +1,15 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart:6:10: Error: 'x' isn't an instance field of this class.
+//   A(this.x);
+//          ^
+//
+// pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart:10:9: Error: The superclass, 'A', has no unnamed constructor that takes no arguments.
+//   const B();
+//         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.strong.expect b/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.strong.expect
index 815d322..5f6b84a 100644
--- a/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart:6:10: Error: 'x' isn't an instance field of this class.
 //   A(this.x);
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart:10:9: Error: The superclass, 'A', has no unnamed constructor that takes no arguments.
 //   const B();
 //         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.strong.transformed.expect
index e218a4f..5f6b84a 100644
--- a/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart.strong.transformed.expect
@@ -1,4 +1,15 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart:6:10: Error: 'x' isn't an instance field of this class.
+//   A(this.x);
+//          ^
+//
+// pkg/front_end/testcases/rasta/bad_implicit_super_constructor.dart:10:9: Error: The superclass, 'A', has no unnamed constructor that takes no arguments.
+//   const B();
+//         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_interpolation.dart.outline.expect b/pkg/front_end/testcases/rasta/bad_interpolation.dart.outline.expect
index f08449b..2622e7c 100644
--- a/pkg/front_end/testcases/rasta/bad_interpolation.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/bad_interpolation.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_interpolation.dart:6:13: Error: String starting with " must end with ".
 //   print(" $x.);
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/rasta/bad_interpolation.dart:6:8: Error: Can't find ')' to match '('.
 //   print(" $x.);
 //        ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/rasta/bad_interpolation.dart.strong.expect b/pkg/front_end/testcases/rasta/bad_interpolation.dart.strong.expect
index 6d6a791..36fe259 100644
--- a/pkg/front_end/testcases/rasta/bad_interpolation.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/bad_interpolation.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_interpolation.dart:6:13: Error: String starting with " must end with ".
 //   print(" $x.);
@@ -15,22 +17,7 @@
 // pkg/front_end/testcases/rasta/bad_interpolation.dart:6:13: Error: Expected ';' after this.
 //   print(" $x.);
 //             ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/bad_interpolation.dart:6:13: Error: String starting with " must end with ".
-//   print(" $x.);
-//             ^^^
-//
-// pkg/front_end/testcases/rasta/bad_interpolation.dart:6:8: Error: Can't find ')' to match '('.
-//   print(" $x.);
-//        ^
-//
-// pkg/front_end/testcases/rasta/bad_interpolation.dart:6:13: Error: Expected ';' after this.
-//   print(" $x.);
-//             ^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_interpolation.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/bad_interpolation.dart.strong.transformed.expect
index 7e1cc73..36fe259 100644
--- a/pkg/front_end/testcases/rasta/bad_interpolation.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_interpolation.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_interpolation.dart:6:13: Error: String starting with " must end with ".
 //   print(" $x.);
@@ -8,11 +10,14 @@
 //   print(" $x.);
 //        ^
 //
+// pkg/front_end/testcases/rasta/bad_interpolation.dart:6:12: Error: Getter not found: 'x'.
+//   print(" $x.);
+//            ^
+//
 // pkg/front_end/testcases/rasta/bad_interpolation.dart:6:13: Error: Expected ';' after this.
 //   print(" $x.);
 //             ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_redirection.dart.outline.expect b/pkg/front_end/testcases/rasta/bad_redirection.dart.outline.expect
index 06f511e..9bed78b 100644
--- a/pkg/front_end/testcases/rasta/bad_redirection.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/bad_redirection.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_redirection.dart:6:9: Error: Only factory constructor can specify '=' redirection.
 // Try making this a factory constructor, or remove the redirection.
 //   Foo() = Bar;
 //         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_redirection.dart.strong.expect b/pkg/front_end/testcases/rasta/bad_redirection.dart.strong.expect
index b9c7876..134d8c3 100644
--- a/pkg/front_end/testcases/rasta/bad_redirection.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/bad_redirection.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_redirection.dart:6:9: Error: Only factory constructor can specify '=' redirection.
 // Try making this a factory constructor, or remove the redirection.
@@ -14,20 +16,7 @@
 // Try removing the return type.
 //   Foo() = Bar;
 //           ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/bad_redirection.dart:6:9: Error: Only factory constructor can specify '=' redirection.
-// Try making this a factory constructor, or remove the redirection.
-//   Foo() = Bar;
-//         ^
-//
-// pkg/front_end/testcases/rasta/bad_redirection.dart:6:9: Error: Expected a function body or '=>'.
-// Try adding {}.
-//   Foo() = Bar;
-//         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_redirection.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/bad_redirection.dart.strong.transformed.expect
index 016f9e1..134d8c3 100644
--- a/pkg/front_end/testcases/rasta/bad_redirection.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_redirection.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_redirection.dart:6:9: Error: Only factory constructor can specify '=' redirection.
 // Try making this a factory constructor, or remove the redirection.
@@ -9,8 +11,12 @@
 // Try adding {}.
 //   Foo() = Bar;
 //         ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/bad_redirection.dart:6:11: Error: Constructors can't have a return type.
+// Try removing the return type.
+//   Foo() = Bar;
+//           ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.legacy.expect b/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.legacy.expect
index 9cf944e..5a47079 100644
--- a/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_setter_initializer.dart:6:9: Error: 'field' isn't an instance field of this class.
 //   C() : field = null;
 //         ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.legacy.transformed.expect
index ee2c69c..5a47079 100644
--- a/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/bad_setter_initializer.dart:6:9: Error: 'field' isn't an instance field of this class.
+//   C() : field = null;
+//         ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.strong.expect b/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.strong.expect
index e77acb3..ad364e1 100644
--- a/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_setter_initializer.dart:6:9: Error: 'field' isn't an instance field of this class.
 //   C() : field = null;
 //         ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.strong.transformed.expect
index 692c97d..ad364e1 100644
--- a/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_setter_initializer.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/bad_setter_initializer.dart:6:9: Error: 'field' isn't an instance field of this class.
+//   C() : field = null;
+//         ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_unicode.dart.strong.expect b/pkg/front_end/testcases/rasta/bad_unicode.dart.strong.expect
index c35015a..749bace 100644
--- a/pkg/front_end/testcases/rasta/bad_unicode.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/bad_unicode.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/bad_unicode.dart:6:10: Error: An escape sequence starting with '\u' must be followed by 4 hexadecimal digits or from 1 to 6 digits between '{' and '}'.
-//   print("\u00"); // Bad Unicode escape, must have 4 hex digits.
-//          ^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/bad_unicode.dart:6:10: Error: An escape sequence starting with '\u' must be followed by 4 hexadecimal digits or from 1 to 6 digits between '{' and '}'.
-//   print("\u00"); // Bad Unicode escape, must have 4 hex digits.
-//          ^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/bad_unicode.dart:6:10: Error: An escape sequence starting with '\u' must be followed by 4 hexadecimal digits or from 1 to 6 digits between '{' and '}'.
+//   print("\u00"); // Bad Unicode escape, must have 4 hex digits.
+//          ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/bad_unicode.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/bad_unicode.dart.strong.transformed.expect
index 5a2277d..749bace 100644
--- a/pkg/front_end/testcases/rasta/bad_unicode.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/bad_unicode.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/bad_unicode.dart:6:10: Error: An escape sequence starting with '\u' must be followed by 4 hexadecimal digits or from 1 to 6 digits between '{' and '}'.
 //   print("\u00"); // Bad Unicode escape, must have 4 hex digits.
 //          ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/breaking_bad.dart.strong.expect b/pkg/front_end/testcases/rasta/breaking_bad.dart.strong.expect
index 583a90e..2b0eb13 100644
--- a/pkg/front_end/testcases/rasta/breaking_bad.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/breaking_bad.dart.strong.expect
@@ -1,18 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/breaking_bad.dart:6:3: Error: A break statement can't be used outside of a loop or switch statement.
-// Try removing the break statement.
-//   break;
-//   ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/breaking_bad.dart:6:3: Error: A break statement can't be used outside of a loop or switch statement.
-// Try removing the break statement.
-//   break;
-//   ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/breaking_bad.dart:6:3: Error: A break statement can't be used outside of a loop or switch statement.
+// Try removing the break statement.
+//   break;
+//   ^^^^^
+//
+// pkg/front_end/testcases/rasta/breaking_bad.dart:6:3: Error: A break statement can't be used outside of a loop or switch statement.
+// Try removing the break statement.
+//   break;
+//   ^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/breaking_bad.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/breaking_bad.dart.strong.transformed.expect
index 5401bce..2b0eb13 100644
--- a/pkg/front_end/testcases/rasta/breaking_bad.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/breaking_bad.dart.strong.transformed.expect
@@ -1,11 +1,17 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/breaking_bad.dart:6:3: Error: A break statement can't be used outside of a loop or switch statement.
 // Try removing the break statement.
 //   break;
 //   ^^^^^
-
-library;
+//
+// pkg/front_end/testcases/rasta/breaking_bad.dart:6:3: Error: A break statement can't be used outside of a loop or switch statement.
+// Try removing the break statement.
+//   break;
+//   ^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/class_hierarchy.dart.outline.expect b/pkg/front_end/testcases/rasta/class_hierarchy.dart.outline.expect
index e9ad29f..a6ec9b4 100644
--- a/pkg/front_end/testcases/rasta/class_hierarchy.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/class_hierarchy.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/class_hierarchy.dart:9:7: Error: The type 'Missing' can't be mixed in.
 // class C = Object with Missing;
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/rasta/class_hierarchy.dart:12:11: Warning: Redirection constructor target not found: 'Missing'
 //   factory D() = Missing;
 //           ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/class_hierarchy.dart.strong.expect b/pkg/front_end/testcases/rasta/class_hierarchy.dart.strong.expect
index 6ea6019..d874733 100644
--- a/pkg/front_end/testcases/rasta/class_hierarchy.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/class_hierarchy.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/class_hierarchy.dart:9:7: Error: The type 'Missing' can't be mixed in.
 // class C = Object with Missing;
@@ -27,34 +29,7 @@
 // pkg/front_end/testcases/rasta/class_hierarchy.dart:12:11: Error: Method not found: 'Missing'.
 //   factory D() = Missing;
 //           ^^^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/class_hierarchy.dart:9:7: Error: The type 'Missing' can't be mixed in.
-// class C = Object with Missing;
-//       ^
-//
-// pkg/front_end/testcases/rasta/class_hierarchy.dart:5:17: Error: Type 'Missing' not found.
-// class A extends Missing {}
-//                 ^^^^^^^
-//
-// pkg/front_end/testcases/rasta/class_hierarchy.dart:7:20: Error: Type 'Missing' not found.
-// class B implements Missing {}
-//                    ^^^^^^^
-//
-// pkg/front_end/testcases/rasta/class_hierarchy.dart:9:23: Error: Type 'Missing' not found.
-// class C = Object with Missing;
-//                       ^^^^^^^
-//
-// pkg/front_end/testcases/rasta/class_hierarchy.dart:12:17: Error: Couldn't find constructor 'Missing'.
-//   factory D() = Missing;
-//                 ^
-//
-// pkg/front_end/testcases/rasta/class_hierarchy.dart:12:11: Error: Redirection constructor target not found: 'Missing'
-//   factory D() = Missing;
-//           ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/class_hierarchy.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/class_hierarchy.dart.strong.transformed.expect
index 7426197..94f01e5 100644
--- a/pkg/front_end/testcases/rasta/class_hierarchy.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/class_hierarchy.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/class_hierarchy.dart:9:7: Error: The type 'Missing' can't be mixed in.
 // class C = Object with Missing;
@@ -23,8 +25,11 @@
 // pkg/front_end/testcases/rasta/class_hierarchy.dart:12:11: Error: Redirection constructor target not found: 'Missing'
 //   factory D() = Missing;
 //           ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/class_hierarchy.dart:12:11: Error: Method not found: 'Missing'.
+//   factory D() = Missing;
+//           ^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/constant_get_and_invoke.dart.strong.expect b/pkg/front_end/testcases/rasta/constant_get_and_invoke.dart.strong.expect
index 0176956..04f0a8f 100644
--- a/pkg/front_end/testcases/rasta/constant_get_and_invoke.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/constant_get_and_invoke.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/constant_get_and_invoke.dart:8:4: Error: The method 'call' isn't defined for the class 'int'.
 // Try correcting the name to the name of an existing method, or defining a method named 'call'.
 //   c();
 //    ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/constant_get_and_invoke.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/constant_get_and_invoke.dart.strong.transformed.expect
index ca99349..cc89059 100644
--- a/pkg/front_end/testcases/rasta/constant_get_and_invoke.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/constant_get_and_invoke.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/constant_get_and_invoke.dart:8:4: Error: The method 'call' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing method, or defining a method named 'call'.
+//   c();
+//    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/generic_factory.dart.outline.expect b/pkg/front_end/testcases/rasta/generic_factory.dart.outline.expect
index 312b830..aa25435 100644
--- a/pkg/front_end/testcases/rasta/generic_factory.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/generic_factory.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/generic_factory.dart:16:19: Warning: Couldn't find constructor 'Missing'.
 //   factory A.c() = Missing;
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/rasta/generic_factory.dart:16:11: Warning: Redirection constructor target not found: 'Missing'
 //   factory A.c() = Missing;
 //           ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/generic_factory.dart.strong.expect b/pkg/front_end/testcases/rasta/generic_factory.dart.strong.expect
index c0465b0..c4616c2 100644
--- a/pkg/front_end/testcases/rasta/generic_factory.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/generic_factory.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/generic_factory.dart:16:19: Error: Couldn't find constructor 'Missing'.
 //   factory A.c() = Missing;
@@ -25,32 +27,7 @@
 // pkg/front_end/testcases/rasta/generic_factory.dart:16:11: Error: Method not found: 'Missing'.
 //   factory A.c() = Missing;
 //           ^^^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/generic_factory.dart:16:19: Error: Couldn't find constructor 'Missing'.
-//   factory A.c() = Missing;
-//                   ^
-//
-// pkg/front_end/testcases/rasta/generic_factory.dart:16:11: Error: Redirection constructor target not found: 'Missing'
-//   factory A.c() = Missing;
-//           ^
-//
-// pkg/front_end/testcases/rasta/generic_factory.dart:15:19: Error: The constructor function type 'B<C1> Function()' isn't a subtype of 'A<T> Function()'.
-//  - 'B' is from 'pkg/front_end/testcases/rasta/generic_factory.dart'.
-//  - 'C1' is from 'pkg/front_end/testcases/rasta/generic_factory.dart'.
-//  - 'A' is from 'pkg/front_end/testcases/rasta/generic_factory.dart'.
-//   factory A.b() = B<C1>.a;
-//                   ^
-//
-// pkg/front_end/testcases/rasta/generic_factory.dart:23:19: Error: The constructor function type 'C<C2> Function()' isn't a subtype of 'B<S> Function()'.
-//  - 'C' is from 'pkg/front_end/testcases/rasta/generic_factory.dart'.
-//  - 'C2' is from 'pkg/front_end/testcases/rasta/generic_factory.dart'.
-//  - 'B' is from 'pkg/front_end/testcases/rasta/generic_factory.dart'.
-//   factory B.b() = C<C2>;
-//                   ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/generic_factory.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/generic_factory.dart.strong.transformed.expect
index d931017..0cb3c06 100644
--- a/pkg/front_end/testcases/rasta/generic_factory.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/generic_factory.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/generic_factory.dart:16:19: Error: Couldn't find constructor 'Missing'.
 //   factory A.c() = Missing;
@@ -21,8 +23,11 @@
 //  - 'B' is from 'pkg/front_end/testcases/rasta/generic_factory.dart'.
 //   factory B.b() = C<C2>;
 //                   ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/generic_factory.dart:16:11: Error: Method not found: 'Missing'.
+//   factory A.c() = Missing;
+//           ^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000001.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000001.dart.strong.expect
index d435a39..aa235f1 100644
--- a/pkg/front_end/testcases/rasta/issue_000001.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000001.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000001.dart:11:8: Error: Too many positional arguments: 1 allowed, but 2 found.
 // Try removing the extra positional arguments.
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/rasta/issue_000001.dart:5:1: Context: Found this candidate, but the arguments don't match.
 // test0(x) {
 // ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000001.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000001.dart.strong.transformed.expect
index 0f8dca8..aa235f1 100644
--- a/pkg/front_end/testcases/rasta/issue_000001.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000001.dart.strong.transformed.expect
@@ -1,4 +1,15 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/issue_000001.dart:11:8: Error: Too many positional arguments: 1 allowed, but 2 found.
+// Try removing the extra positional arguments.
+//   test0(0, 1);
+//        ^
+// pkg/front_end/testcases/rasta/issue_000001.dart:5:1: Context: Found this candidate, but the arguments don't match.
+// test0(x) {
+// ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000031.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000031.dart.strong.expect
index 8894cf7..121e3a9 100644
--- a/pkg/front_end/testcases/rasta/issue_000031.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000031.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000031.dart:8:3: Error: A prefix can't be used as an expression.
 //   math..toString();
 //   ^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/issue_000031.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000031.dart.strong.transformed.expect
index 3042bd3..f1470e2 100644
--- a/pkg/front_end/testcases/rasta/issue_000031.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000031.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/issue_000031.dart:8:3: Error: A prefix can't be used as an expression.
+//   math..toString();
+//   ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000032.dart.outline.expect b/pkg/front_end/testcases/rasta/issue_000032.dart.outline.expect
index 80c2638..3e08a90 100644
--- a/pkg/front_end/testcases/rasta/issue_000032.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/issue_000032.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000032.dart:7:1: Error: Expected an identifier, but got '}'.
 // }
@@ -16,8 +18,7 @@
 // pkg/front_end/testcases/rasta/issue_000032.dart:7:1: Error: Expected '{' before this.
 // }
 // ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000032.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000032.dart.strong.expect
index 6e2309c..da9ea12 100644
--- a/pkg/front_end/testcases/rasta/issue_000032.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000032.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000032.dart:7:1: Error: Expected an identifier, but got '}'.
 // }
@@ -30,35 +32,7 @@
 // Try correcting the name to the name of an existing method, or defining a method named '<'.
 //   C<
 //    ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000032.dart:7:1: Error: Expected an identifier, but got '}'.
-// }
-// ^
-//
-// pkg/front_end/testcases/rasta/issue_000032.dart:6:4: Error: Constructors can't have type parameters.
-//   C<
-//    ^^...
-//
-// pkg/front_end/testcases/rasta/issue_000032.dart:6:3: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-//   C<
-//   ^
-//
-// pkg/front_end/testcases/rasta/issue_000032.dart:7:1: Error: Expected '{' before this.
-// }
-// ^
-//
-// pkg/front_end/testcases/rasta/issue_000032.dart:11:1: Error: Expected an identifier, but got '}'.
-// }
-// ^
-//
-// pkg/front_end/testcases/rasta/issue_000032.dart:11:1: Error: Expected ';' after this.
-// }
-// ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000032.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000032.dart.strong.transformed.expect
index 296395e..4a010d8 100644
--- a/pkg/front_end/testcases/rasta/issue_000032.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000032.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000032.dart:7:1: Error: Expected an identifier, but got '}'.
 // }
@@ -24,8 +26,13 @@
 // pkg/front_end/testcases/rasta/issue_000032.dart:11:1: Error: Expected ';' after this.
 // }
 // ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/issue_000032.dart:10:4: Error: The method '<' isn't defined for the class 'Type'.
+//  - 'Type' is from 'dart:core'.
+// Try correcting the name to the name of an existing method, or defining a method named '<'.
+//   C<
+//    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000033.dart.legacy.expect b/pkg/front_end/testcases/rasta/issue_000033.dart.legacy.expect
index 19ba3b1..5af59e6 100644
--- a/pkg/front_end/testcases/rasta/issue_000033.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/issue_000033.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000033.dart:5:2: Warning: Method not found: 'JS'.
 // @JS()
 //  ^^
-
-library;
+//
 import self as self;
 
 @invalid-expression "pkg/front_end/testcases/rasta/issue_000033.dart:5:2: Error: Method not found: 'JS'.
diff --git a/pkg/front_end/testcases/rasta/issue_000033.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/issue_000033.dart.legacy.transformed.expect
index 99c583e..5af59e6 100644
--- a/pkg/front_end/testcases/rasta/issue_000033.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000033.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/issue_000033.dart:5:2: Warning: Method not found: 'JS'.
+// @JS()
+//  ^^
+//
 import self as self;
 
 @invalid-expression "pkg/front_end/testcases/rasta/issue_000033.dart:5:2: Error: Method not found: 'JS'.
diff --git a/pkg/front_end/testcases/rasta/issue_000033.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000033.dart.strong.expect
index 894663d..7774711 100644
--- a/pkg/front_end/testcases/rasta/issue_000033.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000033.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000033.dart:5:2: Error: Method not found: 'JS'.
 // @JS()
 //  ^^
-
-library;
+//
 import self as self;
 
 @invalid-expression "pkg/front_end/testcases/rasta/issue_000033.dart:5:2: Error: Method not found: 'JS'.
diff --git a/pkg/front_end/testcases/rasta/issue_000033.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000033.dart.strong.transformed.expect
index 99c583e..7774711 100644
--- a/pkg/front_end/testcases/rasta/issue_000033.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000033.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/issue_000033.dart:5:2: Error: Method not found: 'JS'.
+// @JS()
+//  ^^
+//
 import self as self;
 
 @invalid-expression "pkg/front_end/testcases/rasta/issue_000033.dart:5:2: Error: Method not found: 'JS'.
diff --git a/pkg/front_end/testcases/rasta/issue_000034.dart.legacy.expect b/pkg/front_end/testcases/rasta/issue_000034.dart.legacy.expect
index 01973e9..6a631bc 100644
--- a/pkg/front_end/testcases/rasta/issue_000034.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/issue_000034.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
@@ -8,15 +10,7 @@
 // pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Can't access 'this' in a field initializer.
 //   const C() : this.x;
 //               ^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Expected an assignment after the field name.
-// To initialize a field, use the syntax 'name = value'.
-//   const C() : this.x;
-//               ^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000034.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/issue_000034.dart.legacy.transformed.expect
index e4532bb..6a631bc 100644
--- a/pkg/front_end/testcases/rasta/issue_000034.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000034.dart.legacy.transformed.expect
@@ -1,11 +1,16 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
 //   const C() : this.x;
 //               ^^^^
-
-library;
+//
+// pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Can't access 'this' in a field initializer.
+//   const C() : this.x;
+//               ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000034.dart.outline.expect b/pkg/front_end/testcases/rasta/issue_000034.dart.outline.expect
index c482cf9..7e1b270 100644
--- a/pkg/front_end/testcases/rasta/issue_000034.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/issue_000034.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
 //   const C() : this.x;
 //               ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000034.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000034.dart.strong.expect
index 01973e9..6a631bc 100644
--- a/pkg/front_end/testcases/rasta/issue_000034.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000034.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
@@ -8,15 +10,7 @@
 // pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Can't access 'this' in a field initializer.
 //   const C() : this.x;
 //               ^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Expected an assignment after the field name.
-// To initialize a field, use the syntax 'name = value'.
-//   const C() : this.x;
-//               ^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000034.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000034.dart.strong.transformed.expect
index e4532bb..6a631bc 100644
--- a/pkg/front_end/testcases/rasta/issue_000034.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000034.dart.strong.transformed.expect
@@ -1,11 +1,16 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
 //   const C() : this.x;
 //               ^^^^
-
-library;
+//
+// pkg/front_end/testcases/rasta/issue_000034.dart:6:15: Error: Can't access 'this' in a field initializer.
+//   const C() : this.x;
+//               ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035.dart.legacy.expect b/pkg/front_end/testcases/rasta/issue_000035.dart.legacy.expect
index 50d18b1..793cade 100644
--- a/pkg/front_end/testcases/rasta/issue_000035.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Error: The non-ASCII character 'æ' (U+00E6) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -23,31 +25,7 @@
 // pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Context: 'C.æøC' is defined here.
 // class C {æøC();}
 //          ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Error: The non-ASCII character 'æ' (U+00E6) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-// class C {æøC();}
-//          ^
-//
-// pkg/front_end/testcases/rasta/issue_000035.dart:5:11: Error: The non-ASCII character 'ø' (U+00F8) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-// class C {æøC();}
-//           ^
-//
-// pkg/front_end/testcases/rasta/issue_000035.dart:5:7: Error: The non-abstract class 'C' is missing implementations for these members:
-//  - C.æøC
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class C {æøC();}
-//       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/issue_000035.dart.legacy.transformed.expect
index 05fecd8..793cade 100644
--- a/pkg/front_end/testcases/rasta/issue_000035.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Error: The non-ASCII character 'æ' (U+00E6) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -17,11 +19,13 @@
 //  - inherit an implementation from a superclass or mixin,
 //  - mark the class as abstract, or
 //  - provide a 'noSuchMethod' implementation.
-// 
+//
 // class C {æøC();}
 //       ^
-
-library;
+// pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Context: 'C.æøC' is defined here.
+// class C {æøC();}
+//          ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035.dart.outline.expect b/pkg/front_end/testcases/rasta/issue_000035.dart.outline.expect
index 9df0e68..70748ad 100644
--- a/pkg/front_end/testcases/rasta/issue_000035.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Error: The non-ASCII character 'æ' (U+00E6) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Context: 'C.æøC' is defined here.
 // class C {æøC();}
 //          ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000035.dart.strong.expect
index 50d18b1..793cade 100644
--- a/pkg/front_end/testcases/rasta/issue_000035.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Error: The non-ASCII character 'æ' (U+00E6) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -23,31 +25,7 @@
 // pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Context: 'C.æøC' is defined here.
 // class C {æøC();}
 //          ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Error: The non-ASCII character 'æ' (U+00E6) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-// class C {æøC();}
-//          ^
-//
-// pkg/front_end/testcases/rasta/issue_000035.dart:5:11: Error: The non-ASCII character 'ø' (U+00F8) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-// class C {æøC();}
-//           ^
-//
-// pkg/front_end/testcases/rasta/issue_000035.dart:5:7: Error: The non-abstract class 'C' is missing implementations for these members:
-//  - C.æøC
-// Try to either
-//  - provide an implementation,
-//  - inherit an implementation from a superclass or mixin,
-//  - mark the class as abstract, or
-//  - provide a 'noSuchMethod' implementation.
-// 
-// class C {æøC();}
-//       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000035.dart.strong.transformed.expect
index 05fecd8..793cade 100644
--- a/pkg/front_end/testcases/rasta/issue_000035.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Error: The non-ASCII character 'æ' (U+00E6) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -17,11 +19,13 @@
 //  - inherit an implementation from a superclass or mixin,
 //  - mark the class as abstract, or
 //  - provide a 'noSuchMethod' implementation.
-// 
+//
 // class C {æøC();}
 //       ^
-
-library;
+// pkg/front_end/testcases/rasta/issue_000035.dart:5:10: Context: 'C.æøC' is defined here.
+// class C {æøC();}
+//          ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035a.dart.legacy.expect b/pkg/front_end/testcases/rasta/issue_000035a.dart.legacy.expect
index 96ddc05..6e7d2e5 100644
--- a/pkg/front_end/testcases/rasta/issue_000035a.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035a.dart.legacy.expect
@@ -1,24 +1,15 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/issue_000035a.dart:5:9: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
-// class C{  C();}
-//         ^
-//
-// pkg/front_end/testcases/rasta/issue_000035a.dart:5:10: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
-// class C{  C();}
-//          ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/issue_000035a.dart:5:9: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
-// class C{  C();}
-//         ^
-//
-// pkg/front_end/testcases/rasta/issue_000035a.dart:5:10: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
-// class C{  C();}
-//          ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/issue_000035a.dart:5:9: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
+// class C{  C();}
+//         ^
+//
+// pkg/front_end/testcases/rasta/issue_000035a.dart:5:10: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
+// class C{  C();}
+//          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035a.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/issue_000035a.dart.legacy.transformed.expect
index 5b57ed6..6e7d2e5 100644
--- a/pkg/front_end/testcases/rasta/issue_000035a.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035a.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000035a.dart:5:9: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
 // class C{  C();}
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/rasta/issue_000035a.dart:5:10: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
 // class C{  C();}
 //          ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035a.dart.outline.expect b/pkg/front_end/testcases/rasta/issue_000035a.dart.outline.expect
index 4ad8bee..b67d8e0 100644
--- a/pkg/front_end/testcases/rasta/issue_000035a.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035a.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000035a.dart:5:9: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
 // class C{  C();}
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/rasta/issue_000035a.dart:5:10: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
 // class C{  C();}
 //          ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035a.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000035a.dart.strong.expect
index 96ddc05..6e7d2e5 100644
--- a/pkg/front_end/testcases/rasta/issue_000035a.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035a.dart.strong.expect
@@ -1,24 +1,15 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/issue_000035a.dart:5:9: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
-// class C{  C();}
-//         ^
-//
-// pkg/front_end/testcases/rasta/issue_000035a.dart:5:10: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
-// class C{  C();}
-//          ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/issue_000035a.dart:5:9: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
-// class C{  C();}
-//         ^
-//
-// pkg/front_end/testcases/rasta/issue_000035a.dart:5:10: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
-// class C{  C();}
-//          ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/issue_000035a.dart:5:9: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
+// class C{  C();}
+//         ^
+//
+// pkg/front_end/testcases/rasta/issue_000035a.dart:5:10: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
+// class C{  C();}
+//          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000035a.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000035a.dart.strong.transformed.expect
index 5b57ed6..6e7d2e5 100644
--- a/pkg/front_end/testcases/rasta/issue_000035a.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000035a.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000035a.dart:5:9: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
 // class C{  C();}
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/rasta/issue_000035a.dart:5:10: Error: The non-ASCII space character U+2028 can only be used in strings and comments.
 // class C{  C();}
 //          ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000036.dart.outline.expect b/pkg/front_end/testcases/rasta/issue_000036.dart.outline.expect
index b1d01f2..14f3ce3 100644
--- a/pkg/front_end/testcases/rasta/issue_000036.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/issue_000036.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000036.dart:5:14: Error: Expected an identifier, but got '-'.
 // main() => a. - 5;
 //              ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/rasta/issue_000036.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000036.dart.strong.expect
index 52166ab..c46dc5c 100644
--- a/pkg/front_end/testcases/rasta/issue_000036.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000036.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000036.dart:5:14: Error: Expected an identifier, but got '-'.
 // main() => a. - 5;
@@ -7,14 +9,7 @@
 // pkg/front_end/testcases/rasta/issue_000036.dart:5:14: Error: Expected an identifier, but got ''.
 // main() => a. - 5;
 //              ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000036.dart:5:14: Error: Expected an identifier, but got '-'.
-// main() => a. - 5;
-//              ^
-
-library;
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/rasta/issue_000036.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000036.dart.strong.transformed.expect
index a3dffd2..c46dc5c 100644
--- a/pkg/front_end/testcases/rasta/issue_000036.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000036.dart.strong.transformed.expect
@@ -1,10 +1,15 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000036.dart:5:14: Error: Expected an identifier, but got '-'.
 // main() => a. - 5;
 //              ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/issue_000036.dart:5:14: Error: Expected an identifier, but got ''.
+// main() => a. - 5;
+//              ^
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/rasta/issue_000041.dart.legacy.expect b/pkg/front_end/testcases/rasta/issue_000041.dart.legacy.expect
index e53681c..252265a 100644
--- a/pkg/front_end/testcases/rasta/issue_000041.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/issue_000041.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000041.dart:7:9: Error: '+' is not a prefix operator.
 // Try removing '+'.
@@ -9,15 +11,7 @@
 // To delegate a constructor to a super constructor, put the super call as an initializer.
 //     use(+super);
 //          ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000041.dart:7:9: Error: '+' is not a prefix operator.
-// Try removing '+'.
-//     use(+super);
-//         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000041.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/issue_000041.dart.legacy.transformed.expect
index 96e8ae6..252265a 100644
--- a/pkg/front_end/testcases/rasta/issue_000041.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000041.dart.legacy.transformed.expect
@@ -1,11 +1,17 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000041.dart:7:9: Error: '+' is not a prefix operator.
 // Try removing '+'.
 //     use(+super);
 //         ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/issue_000041.dart:7:10: Error: Can't use 'super' as an expression.
+// To delegate a constructor to a super constructor, put the super call as an initializer.
+//     use(+super);
+//          ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000041.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000041.dart.strong.expect
index 8d033ce..f53740d 100644
--- a/pkg/front_end/testcases/rasta/issue_000041.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000041.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000041.dart:7:9: Error: '+' is not a prefix operator.
 // Try removing '+'.
@@ -9,15 +11,7 @@
 // To delegate a constructor to a super constructor, put the super call as an initializer.
 //     use(+super);
 //          ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000041.dart:7:9: Error: '+' is not a prefix operator.
-// Try removing '+'.
-//     use(+super);
-//         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000041.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000041.dart.strong.transformed.expect
index e597329..f53740d 100644
--- a/pkg/front_end/testcases/rasta/issue_000041.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000041.dart.strong.transformed.expect
@@ -1,11 +1,17 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000041.dart:7:9: Error: '+' is not a prefix operator.
 // Try removing '+'.
 //     use(+super);
 //         ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/issue_000041.dart:7:10: Error: Can't use 'super' as an expression.
+// To delegate a constructor to a super constructor, put the super call as an initializer.
+//     use(+super);
+//          ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000042.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000042.dart.strong.expect
index ff7ce50..356e6a0 100644
--- a/pkg/front_end/testcases/rasta/issue_000042.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000042.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000042.dart:6:13: Error: Unexpected token ','.
 //   for (var x, y in []) {}
@@ -17,24 +19,7 @@
 // Try removing the continue statement.
 //   L: if (true) { continue L; }
 //                  ^^^^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000042.dart:6:13: Error: Unexpected token ','.
-//   for (var x, y in []) {}
-//             ^
-//
-// pkg/front_end/testcases/rasta/issue_000042.dart:7:8: Error: A continue statement can't be used outside of a loop or switch statement.
-// Try removing the continue statement.
-//   L: { continue L; }
-//        ^^^^^^^^
-//
-// pkg/front_end/testcases/rasta/issue_000042.dart:8:18: Error: A continue statement can't be used outside of a loop or switch statement.
-// Try removing the continue statement.
-//   L: if (true) { continue L; }
-//                  ^^^^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000042.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000042.dart.strong.transformed.expect
index f64ff50..356e6a0 100644
--- a/pkg/front_end/testcases/rasta/issue_000042.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000042.dart.strong.transformed.expect
@@ -1,9 +1,15 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000042.dart:6:13: Error: Unexpected token ','.
 //   for (var x, y in []) {}
 //             ^
 //
+// pkg/front_end/testcases/rasta/issue_000042.dart:6:8: Error: A for-in loop can't have more than one loop variable.
+//   for (var x, y in []) {}
+//        ^^^
+//
 // pkg/front_end/testcases/rasta/issue_000042.dart:7:8: Error: A continue statement can't be used outside of a loop or switch statement.
 // Try removing the continue statement.
 //   L: { continue L; }
@@ -13,8 +19,7 @@
 // Try removing the continue statement.
 //   L: if (true) { continue L; }
 //                  ^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000044.dart.outline.expect b/pkg/front_end/testcases/rasta/issue_000044.dart.outline.expect
index 684d860..5d12971 100644
--- a/pkg/front_end/testcases/rasta/issue_000044.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/issue_000044.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000044.dart:7:8: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -22,8 +24,7 @@
 // pkg/front_end/testcases/rasta/issue_000044.dart:21:30: Warning: Couldn't find constructor 'h'.
 //   C notEvenAConstructor(a) = h;
 //                              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000044.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000044.dart.strong.expect
index 699adf1..75306d4 100644
--- a/pkg/front_end/testcases/rasta/issue_000044.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000044.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000044.dart:7:8: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -60,47 +62,7 @@
 // Try using a constructor or factory that is 'const'.
 //   print(const C.missingFactoryKeyword());
 //               ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000044.dart:7:8: Error: Expected a function body or '=>'.
-// Try adding {}.
-// a b(c) = d;
-//        ^
-//
-// pkg/front_end/testcases/rasta/issue_000044.dart:14:29: Error: Only factory constructor can specify '=' redirection.
-// Try making this a factory constructor, or remove the redirection.
-//   C.missingFactoryKeyword() = C.constant;
-//                             ^
-//
-// pkg/front_end/testcases/rasta/issue_000044.dart:21:28: Error: Only factory constructor can specify '=' redirection.
-// Try making this a factory constructor, or remove the redirection.
-//   C notEvenAConstructor(a) = h;
-//                            ^
-//
-// pkg/front_end/testcases/rasta/issue_000044.dart:7:1: Error: Type 'a' not found.
-// a b(c) = d;
-// ^
-//
-// pkg/front_end/testcases/rasta/issue_000044.dart:21:30: Error: Couldn't find constructor 'h'.
-//   C notEvenAConstructor(a) = h;
-//                              ^
-//
-// pkg/front_end/testcases/rasta/issue_000044.dart:14:29: Error: Expected a function body or '=>'.
-// Try adding {}.
-//   C.missingFactoryKeyword() = C.constant;
-//                             ^
-//
-// pkg/front_end/testcases/rasta/issue_000044.dart:21:28: Error: Expected a function body or '=>'.
-// Try adding {}.
-//   C notEvenAConstructor(a) = h;
-//                            ^
-//
-// pkg/front_end/testcases/rasta/issue_000044.dart:21:30: Error: Getter not found: 'h'.
-//   C notEvenAConstructor(a) = h;
-//                              ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000044.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000044.dart.strong.transformed.expect
index 0f4b3f6..dd30341 100644
--- a/pkg/front_end/testcases/rasta/issue_000044.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000044.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000044.dart:7:8: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -23,11 +25,24 @@
 //   C notEvenAConstructor(a) = h;
 //                              ^
 //
+// pkg/front_end/testcases/rasta/issue_000044.dart:7:10: Error: Getter not found: 'd'.
+// a b(c) = d;
+//          ^
+//
 // pkg/front_end/testcases/rasta/issue_000044.dart:14:29: Error: Expected a function body or '=>'.
 // Try adding {}.
 //   C.missingFactoryKeyword() = C.constant;
 //                             ^
 //
+// pkg/front_end/testcases/rasta/issue_000044.dart:14:33: Error: Getter not found: 'constant'.
+//   C.missingFactoryKeyword() = C.constant;
+//                                 ^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/issue_000044.dart:14:31: Error: Constructors can't have a return type.
+// Try removing the return type.
+//   C.missingFactoryKeyword() = C.constant;
+//                               ^
+//
 // pkg/front_end/testcases/rasta/issue_000044.dart:21:28: Error: Expected a function body or '=>'.
 // Try adding {}.
 //   C notEvenAConstructor(a) = h;
@@ -36,8 +51,18 @@
 // pkg/front_end/testcases/rasta/issue_000044.dart:21:30: Error: Getter not found: 'h'.
 //   C notEvenAConstructor(a) = h;
 //                              ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/issue_000044.dart:21:30: Error: The getter 'h' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/rasta/issue_000044.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'h'.
+//   C notEvenAConstructor(a) = h;
+//                              ^
+//
+// pkg/front_end/testcases/rasta/issue_000044.dart:27:15: Error: Cannot invoke a non-'const' constructor where a const expression is expected.
+// Try using a constructor or factory that is 'const'.
+//   print(const C.missingFactoryKeyword());
+//               ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000045.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000045.dart.strong.expect
index 8540011..389cb09 100644
--- a/pkg/front_end/testcases/rasta/issue_000045.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000045.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/issue_000045.dart:5:18: Error: String starting with """ must end with """.
-// main() => """${1}
-//                  ^...
-//
-// pkg/front_end/testcases/rasta/issue_000045.dart:5:18: Error: Expected ';' after this.
-// main() => """${1}
-//                  ^...
-//
-// pkg/front_end/testcases/rasta/issue_000045.dart:6:1: Error: Unexpected token ''.
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/issue_000045.dart:5:18: Error: String starting with """ must end with """.
-// main() => """${1}
-//                  ^...
-//
-// pkg/front_end/testcases/rasta/issue_000045.dart:5:18: Error: Expected ';' after this.
-// main() => """${1}
-//                  ^...
-//
-// pkg/front_end/testcases/rasta/issue_000045.dart:6:1: Error: Unexpected token ''.
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/issue_000045.dart:5:18: Error: String starting with """ must end with """.
+// main() => """${1}
+//                  ^...
+//
+// pkg/front_end/testcases/rasta/issue_000045.dart:5:18: Error: Expected ';' after this.
+// main() => """${1}
+//                  ^...
+//
+// pkg/front_end/testcases/rasta/issue_000045.dart:6:1: Error: Unexpected token ''.
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/rasta/issue_000045.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000045.dart.strong.transformed.expect
index cfd867a..389cb09 100644
--- a/pkg/front_end/testcases/rasta/issue_000045.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000045.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000045.dart:5:18: Error: String starting with """ must end with """.
 // main() => """${1}
@@ -9,8 +11,7 @@
 //                  ^...
 //
 // pkg/front_end/testcases/rasta/issue_000045.dart:6:1: Error: Unexpected token ''.
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/rasta/issue_000046.dart.outline.expect b/pkg/front_end/testcases/rasta/issue_000046.dart.outline.expect
index 5151357..dace12b 100644
--- a/pkg/front_end/testcases/rasta/issue_000046.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/issue_000046.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000046.dart:6:13: Error: Expected '(' after this.
 //   C c = new Object)();
@@ -15,8 +17,7 @@
 // pkg/front_end/testcases/rasta/issue_000046.dart:6:20: Error: Expected an identifier, but got '('.
 //   C c = new Object)();
 //                    ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000046.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000046.dart.strong.expect
index 6e4cf81..5bc1e07 100644
--- a/pkg/front_end/testcases/rasta/issue_000046.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000046.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000046.dart:6:13: Error: Expected '(' after this.
 //   C c = new Object)();
@@ -22,26 +24,7 @@
 // Change the type of the object being constructed or the context in which it is used.
 //   C c = new Object)();
 //             ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/issue_000046.dart:6:13: Error: Expected '(' after this.
-//   C c = new Object)();
-//             ^^^^^^
-//
-// pkg/front_end/testcases/rasta/issue_000046.dart:6:19: Error: Expected ';' after this.
-//   C c = new Object)();
-//                   ^
-//
-// pkg/front_end/testcases/rasta/issue_000046.dart:6:19: Error: Expected a class member, but got ')'.
-//   C c = new Object)();
-//                   ^
-//
-// pkg/front_end/testcases/rasta/issue_000046.dart:6:20: Error: Expected an identifier, but got '('.
-//   C c = new Object)();
-//                    ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000046.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000046.dart.strong.transformed.expect
index bb3c37b..5bc1e07 100644
--- a/pkg/front_end/testcases/rasta/issue_000046.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000046.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000046.dart:6:13: Error: Expected '(' after this.
 //   C c = new Object)();
@@ -15,8 +17,14 @@
 // pkg/front_end/testcases/rasta/issue_000046.dart:6:20: Error: Expected an identifier, but got '('.
 //   C c = new Object)();
 //                    ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/issue_000046.dart:6:13: Error: The constructor returns type 'Object' that isn't of expected type 'C'.
+//  - 'Object' is from 'dart:core'.
+//  - 'C' is from 'pkg/front_end/testcases/rasta/issue_000046.dart'.
+// Change the type of the object being constructed or the context in which it is used.
+//   C c = new Object)();
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/issue_000047.dart.strong.expect b/pkg/front_end/testcases/rasta/issue_000047.dart.strong.expect
index 0805396..2683e8b 100644
--- a/pkg/front_end/testcases/rasta/issue_000047.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/issue_000047.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/issue_000047.dart:5:17: Error: Expected ')' before this.
-// typedef void T(C<C>);
-//                 ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/issue_000047.dart:5:17: Error: Expected ')' before this.
-// typedef void T(C<C>);
-//                 ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/issue_000047.dart:5:17: Error: Expected ')' before this.
+// typedef void T(C<C>);
+//                 ^
+//
 import self as self;
 
 typedef T = (dynamic) → void;
diff --git a/pkg/front_end/testcases/rasta/issue_000047.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/issue_000047.dart.strong.transformed.expect
index 1209acc..2683e8b 100644
--- a/pkg/front_end/testcases/rasta/issue_000047.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/issue_000047.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/issue_000047.dart:5:17: Error: Expected ')' before this.
 // typedef void T(C<C>);
 //                 ^
-
-library;
+//
 import self as self;
 
 typedef T = (dynamic) → void;
diff --git a/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.outline.expect b/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.outline.expect
index e94468a..d9be9b4 100644
--- a/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/malformed_const_constructor.dart:8:5: Error: Expected '{' before this.
 //     : x = 'foo'
@@ -17,8 +19,7 @@
 // Try adding the name of the type of the variable or the keyword 'var'.
 //     : x = 'foo'
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.strong.expect b/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.strong.expect
index 28a0ed7..f279790 100644
--- a/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/malformed_const_constructor.dart:8:5: Error: Expected '{' before this.
 //     : x = 'foo'
@@ -22,28 +24,7 @@
 // Try using a constructor or factory that is 'const'.
 //   const A();
 //         ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/malformed_const_constructor.dart:8:5: Error: Expected '{' before this.
-//     : x = 'foo'
-//     ^
-//
-// pkg/front_end/testcases/rasta/malformed_const_constructor.dart:6:3: Error: A const constructor can't have a body.
-// Try removing either the 'const' keyword or the body.
-//   const A()
-//   ^^^^^
-//
-// pkg/front_end/testcases/rasta/malformed_const_constructor.dart:8:5: Error: Expected a class member, but got ':'.
-//     : x = 'foo'
-//     ^
-//
-// pkg/front_end/testcases/rasta/malformed_const_constructor.dart:8:7: Error: Variables must be declared using the keywords 'const', 'final', 'var' or a type name.
-// Try adding the name of the type of the variable or the keyword 'var'.
-//     : x = 'foo'
-//       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.strong.transformed.expect
index 58f81f6..f279790 100644
--- a/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/malformed_const_constructor.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/malformed_const_constructor.dart:8:5: Error: Expected '{' before this.
 //     : x = 'foo'
@@ -17,8 +19,12 @@
 // Try adding the name of the type of the variable or the keyword 'var'.
 //     : x = 'foo'
 //       ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/malformed_const_constructor.dart:13:9: Error: Cannot invoke a non-'const' constructor where a const expression is expected.
+// Try using a constructor or factory that is 'const'.
+//   const A();
+//         ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/malformed_function.dart.strong.expect b/pkg/front_end/testcases/rasta/malformed_function.dart.strong.expect
index f964b8b..35bc1cd 100644
--- a/pkg/front_end/testcases/rasta/malformed_function.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/malformed_function.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/malformed_function.dart:7:8: Error: Can't assign to a parenthesized expression.
 //   (null) = null;
 //        ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/malformed_function.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/malformed_function.dart.strong.transformed.expect
index caf6bf2..35bc1cd 100644
--- a/pkg/front_end/testcases/rasta/malformed_function.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/malformed_function.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/malformed_function.dart:7:8: Error: Can't assign to a parenthesized expression.
+//   (null) = null;
+//        ^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/malformed_function_type.dart.legacy.expect b/pkg/front_end/testcases/rasta/malformed_function_type.dart.legacy.expect
index ffb842a..a560042 100644
--- a/pkg/front_end/testcases/rasta/malformed_function_type.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/malformed_function_type.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/malformed_function_type.dart:5:16: Error: The typedef 'Handle' has a reference to itself.
-// typedef Handle Handle(String command);
-//                ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/malformed_function_type.dart:5:16: Error: The typedef 'Handle' has a reference to itself.
-// typedef Handle Handle(String command);
-//                ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/malformed_function_type.dart:5:16: Error: The typedef 'Handle' has a reference to itself.
+// typedef Handle Handle(String command);
+//                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/malformed_function_type.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/malformed_function_type.dart.legacy.transformed.expect
index a51b1d7..a560042 100644
--- a/pkg/front_end/testcases/rasta/malformed_function_type.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/malformed_function_type.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/malformed_function_type.dart:5:16: Error: The typedef 'Handle' has a reference to itself.
 // typedef Handle Handle(String command);
 //                ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/malformed_function_type.dart.outline.expect b/pkg/front_end/testcases/rasta/malformed_function_type.dart.outline.expect
index 6591886..b38e97e 100644
--- a/pkg/front_end/testcases/rasta/malformed_function_type.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/malformed_function_type.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/malformed_function_type.dart:5:16: Error: The typedef 'Handle' has a reference to itself.
 // typedef Handle Handle(String command);
 //                ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/malformed_function_type.dart.strong.expect b/pkg/front_end/testcases/rasta/malformed_function_type.dart.strong.expect
index ffb842a..a560042 100644
--- a/pkg/front_end/testcases/rasta/malformed_function_type.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/malformed_function_type.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/malformed_function_type.dart:5:16: Error: The typedef 'Handle' has a reference to itself.
-// typedef Handle Handle(String command);
-//                ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/malformed_function_type.dart:5:16: Error: The typedef 'Handle' has a reference to itself.
-// typedef Handle Handle(String command);
-//                ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/malformed_function_type.dart:5:16: Error: The typedef 'Handle' has a reference to itself.
+// typedef Handle Handle(String command);
+//                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/malformed_function_type.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/malformed_function_type.dart.strong.transformed.expect
index a51b1d7..a560042 100644
--- a/pkg/front_end/testcases/rasta/malformed_function_type.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/malformed_function_type.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/malformed_function_type.dart:5:16: Error: The typedef 'Handle' has a reference to itself.
 // typedef Handle Handle(String command);
 //                ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.outline.expect b/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.outline.expect
index fde9d1b..bf1b2a6 100644
--- a/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart:5:16: Error: Non-optional parameters can't have a default value.
 // Try removing the default value or making the parameter optional.
 // main(arguments = [x]) {
 //                ^
-
-library;
+//
 import self as self;
 
 static method main(dynamic arguments) → dynamic
diff --git a/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.strong.expect b/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.strong.expect
index 16c7815..f49eacf 100644
--- a/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart:5:16: Error: Non-optional parameters can't have a default value.
 // Try removing the default value or making the parameter optional.
@@ -8,15 +10,7 @@
 // pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart:5:19: Error: Getter not found: 'x'.
 // main(arguments = [x]) {
 //                   ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart:5:16: Error: Non-optional parameters can't have a default value.
-// Try removing the default value or making the parameter optional.
-// main(arguments = [x]) {
-//                ^
-
-library;
 import self as self;
 
 static method main(dynamic arguments = <dynamic>[invalid-expression "pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart:5:19: Error: Getter not found: 'x'.
diff --git a/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.strong.transformed.expect
index 060ab4d..f49eacf 100644
--- a/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart.strong.transformed.expect
@@ -1,11 +1,16 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart:5:16: Error: Non-optional parameters can't have a default value.
 // Try removing the default value or making the parameter optional.
 // main(arguments = [x]) {
 //                ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart:5:19: Error: Getter not found: 'x'.
+// main(arguments = [x]) {
+//                   ^
+//
 import self as self;
 
 static method main(dynamic arguments = <dynamic>[invalid-expression "pkg/front_end/testcases/rasta/mandatory_parameter_initializer.dart:5:19: Error: Getter not found: 'x'.
diff --git a/pkg/front_end/testcases/rasta/mixin_library.dart.strong.expect b/pkg/front_end/testcases/rasta/mixin_library.dart.strong.expect
index eadddb5..e919718 100644
--- a/pkg/front_end/testcases/rasta/mixin_library.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/mixin_library.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/mixin_library.dart:16:18: Error: Superclass has no method named 'foo'.
-//   foo() => super.foo() + f();
-//                  ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/mixin_library.dart:16:18: Error: Superclass has no method named 'foo'.
-//   foo() => super.foo() + f();
-//                  ^^^
-
 library test.mixin_library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/mixin_library.dart:16:18: Error: Superclass has no method named 'foo'.
+//   foo() => super.foo() + f();
+//                  ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/parser_error.dart.strong.expect b/pkg/front_end/testcases/rasta/parser_error.dart.strong.expect
index 9b575d7..215a1d0 100644
--- a/pkg/front_end/testcases/rasta/parser_error.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/parser_error.dart.strong.expect
@@ -1,32 +1,19 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/parser_error.dart:10:7: Error: Expected an identifier, but got '?'.
-//   if (?b) return b;  /// 01: compile-time error
-//       ^
-//
-// pkg/front_end/testcases/rasta/parser_error.dart:10:9: Error: Expected ':' before this.
-//   if (?b) return b;  /// 01: compile-time error
-//         ^
-//
-// pkg/front_end/testcases/rasta/parser_error.dart:10:9: Error: Expected an identifier, but got ')'.
-//   if (?b) return b;  /// 01: compile-time error
-//         ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/parser_error.dart:10:7: Error: Expected an identifier, but got '?'.
-//   if (?b) return b;  /// 01: compile-time error
-//       ^
-//
-// pkg/front_end/testcases/rasta/parser_error.dart:10:9: Error: Expected ':' before this.
-//   if (?b) return b;  /// 01: compile-time error
-//         ^
-//
-// pkg/front_end/testcases/rasta/parser_error.dart:10:9: Error: Expected an identifier, but got ')'.
-//   if (?b) return b;  /// 01: compile-time error
-//         ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/parser_error.dart:10:7: Error: Expected an identifier, but got '?'.
+//   if (?b) return b;  /// 01: compile-time error
+//       ^
+//
+// pkg/front_end/testcases/rasta/parser_error.dart:10:9: Error: Expected ':' before this.
+//   if (?b) return b;  /// 01: compile-time error
+//         ^
+//
+// pkg/front_end/testcases/rasta/parser_error.dart:10:9: Error: Expected an identifier, but got ')'.
+//   if (?b) return b;  /// 01: compile-time error
+//         ^
+//
 import self as self;
 import "dart:core" as core;
 import "package:expect/expect.dart" as exp;
diff --git a/pkg/front_end/testcases/rasta/parser_error.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/parser_error.dart.strong.transformed.expect
index 1e72f8b..215a1d0 100644
--- a/pkg/front_end/testcases/rasta/parser_error.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/parser_error.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/parser_error.dart:10:7: Error: Expected an identifier, but got '?'.
 //   if (?b) return b;  /// 01: compile-time error
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/rasta/parser_error.dart:10:9: Error: Expected an identifier, but got ')'.
 //   if (?b) return b;  /// 01: compile-time error
 //         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 import "package:expect/expect.dart" as exp;
diff --git a/pkg/front_end/testcases/rasta/static.dart.legacy.expect b/pkg/front_end/testcases/rasta/static.dart.legacy.expect
index 202c04a..70d0f8c 100644
--- a/pkg/front_end/testcases/rasta/static.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/static.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/static.dart:28:9: Warning: Getter not found: 'staticSetter'.
 //     Foo.staticSetter;
@@ -135,8 +137,7 @@
 // pkg/front_end/testcases/rasta/static.dart:84:13: Warning: Getter not found: 'staticSetter'.
 //     use(Foo.staticSetter ??= 87);
 //             ^^^^^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/static.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/static.dart.legacy.transformed.expect
index 1147ce7..70d0f8c 100644
--- a/pkg/front_end/testcases/rasta/static.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/static.dart.legacy.transformed.expect
@@ -1,4 +1,143 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/static.dart:28:9: Warning: Getter not found: 'staticSetter'.
+//     Foo.staticSetter;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:29:13: Warning: Getter not found: 'staticSetter'.
+//     use(Foo.staticSetter);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:31:9: Warning: Setter not found: 'staticConstant'.
+//     Foo.staticConstant++;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:32:13: Warning: Setter not found: 'staticConstant'.
+//     use(Foo.staticConstant++);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:35:9: Warning: Setter not found: 'staticFunction'.
+//     Foo.staticFunction++;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:36:13: Warning: Setter not found: 'staticFunction'.
+//     use(Foo.staticFunction++);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:37:9: Warning: Setter not found: 'staticGetter'.
+//     Foo.staticGetter++;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:38:13: Warning: Setter not found: 'staticGetter'.
+//     use(Foo.staticGetter++);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:39:9: Warning: Getter not found: 'staticSetter'.
+//     Foo.staticSetter++;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:40:13: Warning: Getter not found: 'staticSetter'.
+//     use(Foo.staticSetter++);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:42:11: Warning: Setter not found: 'staticConstant'.
+//     ++Foo.staticConstant;
+//           ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:43:15: Warning: Setter not found: 'staticConstant'.
+//     use(++Foo.staticConstant);
+//               ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:46:11: Warning: Setter not found: 'staticFunction'.
+//     ++Foo.staticFunction;
+//           ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:47:15: Warning: Setter not found: 'staticFunction'.
+//     use(++Foo.staticFunction);
+//               ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:48:11: Warning: Setter not found: 'staticGetter'.
+//     ++Foo.staticGetter;
+//           ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:49:15: Warning: Setter not found: 'staticGetter'.
+//     use(++Foo.staticGetter);
+//               ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:50:11: Warning: Getter not found: 'staticSetter'.
+//     ++Foo.staticSetter;
+//           ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:51:15: Warning: Getter not found: 'staticSetter'.
+//     use(++Foo.staticSetter);
+//               ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:61:9: Warning: Getter not found: 'staticSetter'.
+//     Foo.staticSetter();
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:62:13: Warning: Getter not found: 'staticSetter'.
+//     use(Foo.staticSetter());
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:64:9: Warning: Setter not found: 'staticConstant'.
+//     Foo.staticConstant = 87;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:65:13: Warning: Setter not found: 'staticConstant'.
+//     use(Foo.staticConstant = 87);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:68:9: Warning: Setter not found: 'staticFunction'.
+//     Foo.staticFunction = 87;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:69:13: Warning: Setter not found: 'staticFunction'.
+//     use(Foo.staticFunction = 87);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:70:9: Warning: Setter not found: 'staticGetter'.
+//     Foo.staticGetter = 87;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:71:13: Warning: Setter not found: 'staticGetter'.
+//     use(Foo.staticGetter = 87);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:75:9: Warning: Setter not found: 'staticConstant'.
+//     Foo.staticConstant ??= 87;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:76:13: Warning: Setter not found: 'staticConstant'.
+//     use(Foo.staticConstant ??= 87);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:79:9: Warning: Setter not found: 'staticFunction'.
+//     Foo.staticFunction ??= 87;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:80:13: Warning: Setter not found: 'staticFunction'.
+//     use(Foo.staticFunction ??= 87);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:81:9: Warning: Setter not found: 'staticGetter'.
+//     Foo.staticGetter ??= 87;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:82:13: Warning: Setter not found: 'staticGetter'.
+//     use(Foo.staticGetter ??= 87);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:83:9: Warning: Getter not found: 'staticSetter'.
+//     Foo.staticSetter ??= 87;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:84:13: Warning: Getter not found: 'staticSetter'.
+//     use(Foo.staticSetter ??= 87);
+//             ^^^^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/static.dart.strong.expect b/pkg/front_end/testcases/rasta/static.dart.strong.expect
index 5efd7f0..34781bf 100644
--- a/pkg/front_end/testcases/rasta/static.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/static.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/static.dart:28:9: Error: Getter not found: 'staticSetter'.
 //     Foo.staticSetter;
@@ -175,8 +177,7 @@
 // Try correcting the name to the name of an existing method, or defining a method named 'call'.
 //     use(Foo.staticField());
 //                        ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/static.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/static.dart.strong.transformed.expect
index 4ac004a..02d5c6b 100644
--- a/pkg/front_end/testcases/rasta/static.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/static.dart.strong.transformed.expect
@@ -1,4 +1,183 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/static.dart:28:9: Error: Getter not found: 'staticSetter'.
+//     Foo.staticSetter;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:29:13: Error: Getter not found: 'staticSetter'.
+//     use(Foo.staticSetter);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:31:9: Error: Setter not found: 'staticConstant'.
+//     Foo.staticConstant++;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:32:13: Error: Setter not found: 'staticConstant'.
+//     use(Foo.staticConstant++);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:35:9: Error: Setter not found: 'staticFunction'.
+//     Foo.staticFunction++;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:36:13: Error: Setter not found: 'staticFunction'.
+//     use(Foo.staticFunction++);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:37:9: Error: Setter not found: 'staticGetter'.
+//     Foo.staticGetter++;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:38:13: Error: Setter not found: 'staticGetter'.
+//     use(Foo.staticGetter++);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:39:9: Error: Getter not found: 'staticSetter'.
+//     Foo.staticSetter++;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:40:13: Error: Getter not found: 'staticSetter'.
+//     use(Foo.staticSetter++);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:42:11: Error: Setter not found: 'staticConstant'.
+//     ++Foo.staticConstant;
+//           ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:43:15: Error: Setter not found: 'staticConstant'.
+//     use(++Foo.staticConstant);
+//               ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:46:11: Error: Setter not found: 'staticFunction'.
+//     ++Foo.staticFunction;
+//           ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:47:15: Error: Setter not found: 'staticFunction'.
+//     use(++Foo.staticFunction);
+//               ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:48:11: Error: Setter not found: 'staticGetter'.
+//     ++Foo.staticGetter;
+//           ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:49:15: Error: Setter not found: 'staticGetter'.
+//     use(++Foo.staticGetter);
+//               ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:50:11: Error: Getter not found: 'staticSetter'.
+//     ++Foo.staticSetter;
+//           ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:51:15: Error: Getter not found: 'staticSetter'.
+//     use(++Foo.staticSetter);
+//               ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:61:9: Error: Getter not found: 'staticSetter'.
+//     Foo.staticSetter();
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:62:13: Error: Getter not found: 'staticSetter'.
+//     use(Foo.staticSetter());
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:64:9: Error: Setter not found: 'staticConstant'.
+//     Foo.staticConstant = 87;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:65:13: Error: Setter not found: 'staticConstant'.
+//     use(Foo.staticConstant = 87);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:68:9: Error: Setter not found: 'staticFunction'.
+//     Foo.staticFunction = 87;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:69:13: Error: Setter not found: 'staticFunction'.
+//     use(Foo.staticFunction = 87);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:70:9: Error: Setter not found: 'staticGetter'.
+//     Foo.staticGetter = 87;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:71:13: Error: Setter not found: 'staticGetter'.
+//     use(Foo.staticGetter = 87);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:75:9: Error: Setter not found: 'staticConstant'.
+//     Foo.staticConstant ??= 87;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:76:13: Error: Setter not found: 'staticConstant'.
+//     use(Foo.staticConstant ??= 87);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:79:9: Error: Setter not found: 'staticFunction'.
+//     Foo.staticFunction ??= 87;
+//         ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:80:13: Error: Setter not found: 'staticFunction'.
+//     use(Foo.staticFunction ??= 87);
+//             ^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:81:9: Error: Setter not found: 'staticGetter'.
+//     Foo.staticGetter ??= 87;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:82:13: Error: Setter not found: 'staticGetter'.
+//     use(Foo.staticGetter ??= 87);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:83:9: Error: Getter not found: 'staticSetter'.
+//     Foo.staticSetter ??= 87;
+//         ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:84:13: Error: Getter not found: 'staticSetter'.
+//     use(Foo.staticSetter ??= 87);
+//             ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/static.dart:35:23: Error: The method '+' isn't defined for the class 'dynamic Function()'.
+// Try correcting the name to the name of an existing method, or defining a method named '+'.
+//     Foo.staticFunction++;
+//                       ^
+//
+// pkg/front_end/testcases/rasta/static.dart:36:27: Error: The method '+' isn't defined for the class 'dynamic Function()'.
+// Try correcting the name to the name of an existing method, or defining a method named '+'.
+//     use(Foo.staticFunction++);
+//                           ^
+//
+// pkg/front_end/testcases/rasta/static.dart:46:5: Error: The method '+' isn't defined for the class 'dynamic Function()'.
+// Try correcting the name to the name of an existing method, or defining a method named '+'.
+//     ++Foo.staticFunction;
+//     ^
+//
+// pkg/front_end/testcases/rasta/static.dart:47:9: Error: The method '+' isn't defined for the class 'dynamic Function()'.
+// Try correcting the name to the name of an existing method, or defining a method named '+'.
+//     use(++Foo.staticFunction);
+//         ^
+//
+// pkg/front_end/testcases/rasta/static.dart:53:23: Error: The method 'call' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing method, or defining a method named 'call'.
+//     Foo.staticConstant();
+//                       ^
+//
+// pkg/front_end/testcases/rasta/static.dart:54:27: Error: The method 'call' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing method, or defining a method named 'call'.
+//     use(Foo.staticConstant());
+//                           ^
+//
+// pkg/front_end/testcases/rasta/static.dart:55:20: Error: The method 'call' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing method, or defining a method named 'call'.
+//     Foo.staticField();
+//                    ^
+//
+// pkg/front_end/testcases/rasta/static.dart:56:24: Error: The method 'call' isn't defined for the class 'int'.
+// Try correcting the name to the name of an existing method, or defining a method named 'call'.
+//     use(Foo.staticField());
+//                        ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/super.dart.legacy.expect b/pkg/front_end/testcases/rasta/super.dart.legacy.expect
index 473cece..55dfd57 100644
--- a/pkg/front_end/testcases/rasta/super.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/super.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/super.dart:27:7: Error: 'n' is already declared in this scope.
 //   set n(_) {}
@@ -236,34 +238,7 @@
 // Try to initialize the field in the declaration or in every constructor.
 //   final d;
 //         ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/super.dart:27:7: Error: 'n' is already declared in this scope.
-//   set n(_) {}
-//       ^
-//
-// pkg/front_end/testcases/rasta/super.dart:43:5: Error: '+' is not a prefix operator.
-// Try removing '+'.
-//     +super;
-//     ^
-//
-// pkg/front_end/testcases/rasta/super.dart:44:9: Error: '+' is not a prefix operator.
-// Try removing '+'.
-//     use(+super);
-//         ^
-//
-// pkg/front_end/testcases/rasta/super.dart:11:9: Error: Final field 'f' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final f;
-//         ^
-//
-// pkg/front_end/testcases/rasta/super.dart:33:9: Error: Final field 'd' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final d;
-//         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/super.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/super.dart.legacy.transformed.expect
index f92047d..55dfd57 100644
--- a/pkg/front_end/testcases/rasta/super.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/super.dart.legacy.transformed.expect
@@ -1,19 +1,234 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/super.dart:27:7: Error: 'n' is already declared in this scope.
 //   set n(_) {}
 //       ^
+// pkg/front_end/testcases/rasta/super.dart:26:8: Context: Previous declaration of 'n'.
+//   void n() {}
+//        ^
 //
 // pkg/front_end/testcases/rasta/super.dart:43:5: Error: '+' is not a prefix operator.
 // Try removing '+'.
 //     +super;
 //     ^
 //
+// pkg/front_end/testcases/rasta/super.dart:43:6: Error: Can't use 'super' as an expression.
+// To delegate a constructor to a super constructor, put the super call as an initializer.
+//     +super;
+//      ^^^^^
+//
 // pkg/front_end/testcases/rasta/super.dart:44:9: Error: '+' is not a prefix operator.
 // Try removing '+'.
 //     use(+super);
 //         ^
 //
+// pkg/front_end/testcases/rasta/super.dart:44:10: Error: Can't use 'super' as an expression.
+// To delegate a constructor to a super constructor, put the super call as an initializer.
+//     use(+super);
+//          ^^^^^
+//
+// pkg/front_end/testcases/rasta/super.dart:62:11: Warning: Superclass has no getter named 'g'.
+//     super.g;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:63:15: Warning: Superclass has no getter named 'g'.
+//     use(super.g);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:83:11: Warning: Superclass has no setter named 'e'.
+//     super.e++;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:84:15: Warning: Superclass has no setter named 'e'.
+//     use(super.e++);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:85:11: Warning: Superclass has no setter named 'f'.
+//     super.f++;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:86:15: Warning: Superclass has no setter named 'f'.
+//     use(super.f++);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:87:11: Warning: Superclass has no getter named 'g'.
+//     super.g++;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:88:15: Warning: Superclass has no getter named 'g'.
+//     use(super.g++);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:95:11: Warning: Superclass has no setter named 'm'.
+//     super.m++;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:96:15: Warning: Superclass has no setter named 'm'.
+//     use(super.m++);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:108:13: Warning: Superclass has no setter named 'e'.
+//     ++super.e;
+//             ^
+//
+// pkg/front_end/testcases/rasta/super.dart:109:17: Warning: Superclass has no setter named 'e'.
+//     use(++super.e);
+//                 ^
+//
+// pkg/front_end/testcases/rasta/super.dart:110:13: Warning: Superclass has no setter named 'f'.
+//     ++super.f;
+//             ^
+//
+// pkg/front_end/testcases/rasta/super.dart:111:17: Warning: Superclass has no setter named 'f'.
+//     use(++super.f);
+//                 ^
+//
+// pkg/front_end/testcases/rasta/super.dart:112:13: Warning: Superclass has no getter named 'g'.
+//     ++super.g;
+//             ^
+//
+// pkg/front_end/testcases/rasta/super.dart:113:17: Warning: Superclass has no getter named 'g'.
+//     use(++super.g);
+//                 ^
+//
+// pkg/front_end/testcases/rasta/super.dart:120:13: Warning: Superclass has no setter named 'm'.
+//     ++super.m;
+//             ^
+//
+// pkg/front_end/testcases/rasta/super.dart:121:17: Warning: Superclass has no setter named 'm'.
+//     use(++super.m);
+//                 ^
+//
+// pkg/front_end/testcases/rasta/super.dart:137:11: Warning: Superclass has no method named 'g'.
+//     super.g();
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:138:15: Warning: Superclass has no method named 'g'.
+//     use(super.g());
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:160:11: Warning: Superclass has no setter named 'e'.
+//     super.e = 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:161:15: Warning: Superclass has no setter named 'e'.
+//     use(super.e = 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:162:11: Warning: Superclass has no setter named 'f'.
+//     super.f = 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:163:15: Warning: Superclass has no setter named 'f'.
+//     use(super.f = 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:172:11: Warning: Superclass has no setter named 'm'.
+//     super.m = 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:173:15: Warning: Superclass has no setter named 'm'.
+//     use(super.m = 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:185:11: Warning: Superclass has no setter named 'e'.
+//     super.e ??= 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:186:15: Warning: Superclass has no setter named 'e'.
+//     use(super.e ??= 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:187:11: Warning: Superclass has no setter named 'f'.
+//     super.f ??= 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:188:15: Warning: Superclass has no setter named 'f'.
+//     use(super.f ??= 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:189:11: Warning: Superclass has no getter named 'g'.
+//     super.g ??= 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:190:15: Warning: Superclass has no getter named 'g'.
+//     use(super.g ??= 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:197:11: Warning: Superclass has no setter named 'm'.
+//     super.m ??= 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:198:15: Warning: Superclass has no setter named 'm'.
+//     use(super.m ??= 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:210:11: Warning: Superclass has no setter named 'e'.
+//     super.e += 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:211:15: Warning: Superclass has no setter named 'e'.
+//     use(super.e += 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:212:11: Warning: Superclass has no setter named 'f'.
+//     super.f += 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:213:15: Warning: Superclass has no setter named 'f'.
+//     use(super.f += 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:214:11: Warning: Superclass has no getter named 'g'.
+//     super.g += 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:215:15: Warning: Superclass has no getter named 'g'.
+//     use(super.g += 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:222:11: Warning: Superclass has no setter named 'm'.
+//     super.m += 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:223:15: Warning: Superclass has no setter named 'm'.
+//     use(super.m += 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:235:11: Warning: Superclass has no setter named 'e'.
+//     super.e -= 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:236:15: Warning: Superclass has no setter named 'e'.
+//     use(super.e -= 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:237:11: Warning: Superclass has no setter named 'f'.
+//     super.f -= 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:238:15: Warning: Superclass has no setter named 'f'.
+//     use(super.f -= 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:239:11: Warning: Superclass has no getter named 'g'.
+//     super.g -= 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:240:15: Warning: Superclass has no getter named 'g'.
+//     use(super.g -= 42);
+//               ^
+//
+// pkg/front_end/testcases/rasta/super.dart:247:11: Warning: Superclass has no setter named 'm'.
+//     super.m -= 42;
+//           ^
+//
+// pkg/front_end/testcases/rasta/super.dart:248:15: Warning: Superclass has no setter named 'm'.
+//     use(super.m -= 42);
+//               ^
+//
 // pkg/front_end/testcases/rasta/super.dart:11:9: Error: Final field 'f' is not initialized.
 // Try to initialize the field in the declaration or in every constructor.
 //   final f;
@@ -23,8 +238,7 @@
 // Try to initialize the field in the declaration or in every constructor.
 //   final d;
 //         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/super.dart.outline.expect b/pkg/front_end/testcases/rasta/super.dart.outline.expect
index c3496aa..d668783 100644
--- a/pkg/front_end/testcases/rasta/super.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/super.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/super.dart:27:7: Error: 'n' is already declared in this scope.
 //   set n(_) {}
@@ -6,8 +8,7 @@
 // pkg/front_end/testcases/rasta/super.dart:26:8: Context: Previous declaration of 'n'.
 //   void n() {}
 //        ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/super.dart.strong.expect b/pkg/front_end/testcases/rasta/super.dart.strong.expect
index de5cebe..e85ea19 100644
--- a/pkg/front_end/testcases/rasta/super.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/super.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/super.dart:27:7: Error: 'n' is already declared in this scope.
 //   set n(_) {}
@@ -348,254 +350,7 @@
 // Try to initialize the field in the declaration or in every constructor.
 //   final d;
 //         ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/super.dart:27:7: Error: 'n' is already declared in this scope.
-//   set n(_) {}
-//       ^
-//
-// pkg/front_end/testcases/rasta/super.dart:43:5: Error: '+' is not a prefix operator.
-// Try removing '+'.
-//     +super;
-//     ^
-//
-// pkg/front_end/testcases/rasta/super.dart:44:9: Error: '+' is not a prefix operator.
-// Try removing '+'.
-//     use(+super);
-//         ^
-//
-// pkg/front_end/testcases/rasta/super.dart:62:11: Error: Superclass has no getter named 'g'.
-//     super.g;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:63:15: Error: Superclass has no getter named 'g'.
-//     use(super.g);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:83:11: Error: Superclass has no setter named 'e'.
-//     super.e++;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:84:15: Error: Superclass has no setter named 'e'.
-//     use(super.e++);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:85:11: Error: Superclass has no setter named 'f'.
-//     super.f++;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:86:15: Error: Superclass has no setter named 'f'.
-//     use(super.f++);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:87:11: Error: Superclass has no getter named 'g'.
-//     super.g++;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:88:15: Error: Superclass has no getter named 'g'.
-//     use(super.g++);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:95:11: Error: Superclass has no setter named 'm'.
-//     super.m++;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:96:15: Error: Superclass has no setter named 'm'.
-//     use(super.m++);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:108:13: Error: Superclass has no setter named 'e'.
-//     ++super.e;
-//             ^
-//
-// pkg/front_end/testcases/rasta/super.dart:109:17: Error: Superclass has no setter named 'e'.
-//     use(++super.e);
-//                 ^
-//
-// pkg/front_end/testcases/rasta/super.dart:110:13: Error: Superclass has no setter named 'f'.
-//     ++super.f;
-//             ^
-//
-// pkg/front_end/testcases/rasta/super.dart:111:17: Error: Superclass has no setter named 'f'.
-//     use(++super.f);
-//                 ^
-//
-// pkg/front_end/testcases/rasta/super.dart:112:13: Error: Superclass has no getter named 'g'.
-//     ++super.g;
-//             ^
-//
-// pkg/front_end/testcases/rasta/super.dart:113:17: Error: Superclass has no getter named 'g'.
-//     use(++super.g);
-//                 ^
-//
-// pkg/front_end/testcases/rasta/super.dart:120:13: Error: Superclass has no setter named 'm'.
-//     ++super.m;
-//             ^
-//
-// pkg/front_end/testcases/rasta/super.dart:121:17: Error: Superclass has no setter named 'm'.
-//     use(++super.m);
-//                 ^
-//
-// pkg/front_end/testcases/rasta/super.dart:137:11: Error: Superclass has no method named 'g'.
-//     super.g();
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:138:15: Error: Superclass has no method named 'g'.
-//     use(super.g());
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:160:11: Error: Superclass has no setter named 'e'.
-//     super.e = 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:161:15: Error: Superclass has no setter named 'e'.
-//     use(super.e = 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:162:11: Error: Superclass has no setter named 'f'.
-//     super.f = 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:163:15: Error: Superclass has no setter named 'f'.
-//     use(super.f = 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:172:11: Error: Superclass has no setter named 'm'.
-//     super.m = 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:173:15: Error: Superclass has no setter named 'm'.
-//     use(super.m = 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:185:11: Error: Superclass has no setter named 'e'.
-//     super.e ??= 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:186:15: Error: Superclass has no setter named 'e'.
-//     use(super.e ??= 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:187:11: Error: Superclass has no setter named 'f'.
-//     super.f ??= 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:188:15: Error: Superclass has no setter named 'f'.
-//     use(super.f ??= 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:189:11: Error: Superclass has no getter named 'g'.
-//     super.g ??= 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:190:15: Error: Superclass has no getter named 'g'.
-//     use(super.g ??= 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:197:11: Error: Superclass has no setter named 'm'.
-//     super.m ??= 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:198:15: Error: Superclass has no setter named 'm'.
-//     use(super.m ??= 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:210:11: Error: Superclass has no setter named 'e'.
-//     super.e += 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:211:15: Error: Superclass has no setter named 'e'.
-//     use(super.e += 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:212:11: Error: Superclass has no setter named 'f'.
-//     super.f += 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:213:15: Error: Superclass has no setter named 'f'.
-//     use(super.f += 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:214:11: Error: Superclass has no getter named 'g'.
-//     super.g += 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:215:15: Error: Superclass has no getter named 'g'.
-//     use(super.g += 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:222:11: Error: Superclass has no setter named 'm'.
-//     super.m += 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:223:15: Error: Superclass has no setter named 'm'.
-//     use(super.m += 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:235:11: Error: Superclass has no setter named 'e'.
-//     super.e -= 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:236:15: Error: Superclass has no setter named 'e'.
-//     use(super.e -= 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:237:11: Error: Superclass has no setter named 'f'.
-//     super.f -= 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:238:15: Error: Superclass has no setter named 'f'.
-//     use(super.f -= 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:239:11: Error: Superclass has no getter named 'g'.
-//     super.g -= 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:240:15: Error: Superclass has no getter named 'g'.
-//     use(super.g -= 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:247:11: Error: Superclass has no setter named 'm'.
-//     super.m -= 42;
-//           ^
-//
-// pkg/front_end/testcases/rasta/super.dart:248:15: Error: Superclass has no setter named 'm'.
-//     use(super.m -= 42);
-//               ^
-//
-// pkg/front_end/testcases/rasta/super.dart:147:12: Error: Too many positional arguments: 0 allowed, but 1 found.
-// Try removing the extra positional arguments.
-//     super.m(87);
-//            ^
-//
-// pkg/front_end/testcases/rasta/super.dart:148:16: Error: Too many positional arguments: 0 allowed, but 1 found.
-// Try removing the extra positional arguments.
-//     use(super.m(87));
-//                ^
-//
-// pkg/front_end/testcases/rasta/super.dart:149:12: Error: Too many positional arguments: 0 allowed, but 1 found.
-// Try removing the extra positional arguments.
-//     super.n(87);
-//            ^
-//
-// pkg/front_end/testcases/rasta/super.dart:150:16: Error: Too many positional arguments: 0 allowed, but 1 found.
-// Try removing the extra positional arguments.
-//     use(super.n(87));
-//                ^
-//
-// pkg/front_end/testcases/rasta/super.dart:11:9: Error: Final field 'f' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final f;
-//         ^
-//
-// pkg/front_end/testcases/rasta/super.dart:33:9: Error: Final field 'd' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final d;
-//         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/super_initializer.dart.strong.expect b/pkg/front_end/testcases/rasta/super_initializer.dart.strong.expect
index 04047ee..c1c4755 100644
--- a/pkg/front_end/testcases/rasta/super_initializer.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/super_initializer.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/super_initializer.dart:14:15: Error: Can't have initializers after 'super'.
 //       : super.arg0(),
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/rasta/super_initializer.dart:20:15: Error: Can't have initializers after 'super'.
 //       : super.arg2(a, b),
 //               ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/super_initializer.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/super_initializer.dart.strong.transformed.expect
index ab3a0b9..c1c4755 100644
--- a/pkg/front_end/testcases/rasta/super_initializer.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/super_initializer.dart.strong.transformed.expect
@@ -1,4 +1,19 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/super_initializer.dart:14:15: Error: Can't have initializers after 'super'.
+//       : super.arg0(),
+//               ^
+//
+// pkg/front_end/testcases/rasta/super_initializer.dart:17:15: Error: Can't have initializers after 'super'.
+//       : super.arg1(a),
+//               ^
+//
+// pkg/front_end/testcases/rasta/super_initializer.dart:20:15: Error: Can't have initializers after 'super'.
+//       : super.arg2(a, b),
+//               ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/super_mixin.dart.legacy.expect b/pkg/front_end/testcases/rasta/super_mixin.dart.legacy.expect
index 5aca9d3..9219084 100644
--- a/pkg/front_end/testcases/rasta/super_mixin.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/super_mixin.dart.legacy.expect
@@ -1,9 +1,3 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/mixin_library.dart:16:18: Warning: Superclass has no method named 'foo'.
-//   foo() => super.foo() + f();
-//                  ^^^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/rasta/super_mixin.dart.strong.expect b/pkg/front_end/testcases/rasta/super_mixin.dart.strong.expect
index ac00fc5..f79ab16 100644
--- a/pkg/front_end/testcases/rasta/super_mixin.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/super_mixin.dart.strong.expect
@@ -1,15 +1,3 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/mixin_library.dart:16:18: Error: Superclass has no method named 'foo'.
-//   foo() => super.foo() + f();
-//                  ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/mixin_library.dart:16:18: Error: Superclass has no method named 'foo'.
-//   foo() => super.foo() + f();
-//                  ^^^
-
 library;
 import self as self;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/rasta/super_operator.dart.strong.expect b/pkg/front_end/testcases/rasta/super_operator.dart.strong.expect
index 152b391..c49d683 100644
--- a/pkg/front_end/testcases/rasta/super_operator.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/super_operator.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/super_operator.dart:22:15: Error: Superclass has no method named '[]'.
-//   g() => super[0];
-//               ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/super_operator.dart:22:15: Error: Superclass has no method named '[]'.
-//   g() => super[0];
-//               ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/super_operator.dart:22:15: Error: Superclass has no method named '[]'.
+//   g() => super[0];
+//               ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.legacy.expect b/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.legacy.expect
index fbd4248..3dec981 100644
--- a/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:35:5: Warning: Switch case may fall through to the next case.
 //     case 2:  result = 2; /// static warning - case fall-through, see "Switch"
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:46:5: Warning: Switch case may fall through to the next case.
 //     case 1:
 //     ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.legacy.transformed.expect
index 8c84e9b..3dec981 100644
--- a/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.legacy.transformed.expect
@@ -1,4 +1,19 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:35:5: Warning: Switch case may fall through to the next case.
+//     case 2:  result = 2; /// static warning - case fall-through, see "Switch"
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:36:5: Warning: Switch case may fall through to the next case.
+//     case 3:  result = 3; /// static warning - case fall-through, see "Switch"
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:46:5: Warning: Switch case may fall through to the next case.
+//     case 1:
+//     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.strong.expect b/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.strong.expect
index dd4fb5e..4ad744c 100644
--- a/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.strong.expect
@@ -1,32 +1,19 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:35:5: Error: Switch case may fall through to the next case.
-//     case 2:  result = 2; /// static warning - case fall-through, see "Switch"
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:36:5: Error: Switch case may fall through to the next case.
-//     case 3:  result = 3; /// static warning - case fall-through, see "Switch"
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:46:5: Error: Switch case may fall through to the next case.
-//     case 1:
-//     ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:35:5: Error: Switch case may fall through to the next case.
-//     case 2:  result = 2; /// static warning - case fall-through, see "Switch"
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:36:5: Error: Switch case may fall through to the next case.
-//     case 3:  result = 3; /// static warning - case fall-through, see "Switch"
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:46:5: Error: Switch case may fall through to the next case.
-//     case 1:
-//     ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:35:5: Error: Switch case may fall through to the next case.
+//     case 2:  result = 2; /// static warning - case fall-through, see "Switch"
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:36:5: Error: Switch case may fall through to the next case.
+//     case 3:  result = 3; /// static warning - case fall-through, see "Switch"
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:46:5: Error: Switch case may fall through to the next case.
+//     case 1:
+//     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.strong.transformed.expect
index a0e9c4f..4ad744c 100644
--- a/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/switch_execution_case_t02.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:35:5: Error: Switch case may fall through to the next case.
 //     case 2:  result = 2; /// static warning - case fall-through, see "Switch"
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/rasta/switch_execution_case_t02.dart:46:5: Error: Switch case may fall through to the next case.
 //     case 1:
 //     ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/switch_fall_through.dart.legacy.expect b/pkg/front_end/testcases/rasta/switch_fall_through.dart.legacy.expect
index d2d8a68..917a871 100644
--- a/pkg/front_end/testcases/rasta/switch_fall_through.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/switch_fall_through.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/switch_fall_through.dart:7:5: Warning: Switch case may fall through to the next case.
 //     case 1:
@@ -19,8 +21,7 @@
 // pkg/front_end/testcases/rasta/switch_fall_through.dart:31:5: Warning: Switch case may fall through to the next case.
 //     case 5:
 //     ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/switch_fall_through.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/switch_fall_through.dart.legacy.transformed.expect
index bbdd5fa..917a871 100644
--- a/pkg/front_end/testcases/rasta/switch_fall_through.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/switch_fall_through.dart.legacy.transformed.expect
@@ -1,4 +1,27 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:7:5: Warning: Switch case may fall through to the next case.
+//     case 1:
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:13:5: Warning: Switch case may fall through to the next case.
+//     case 2:
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:20:5: Warning: Switch case may fall through to the next case.
+//     case 3:
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:26:5: Warning: Switch case may fall through to the next case.
+//     case 4:
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:31:5: Warning: Switch case may fall through to the next case.
+//     case 5:
+//     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/switch_fall_through.dart.strong.expect b/pkg/front_end/testcases/rasta/switch_fall_through.dart.strong.expect
index 04d25f9..4370b01 100644
--- a/pkg/front_end/testcases/rasta/switch_fall_through.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/switch_fall_through.dart.strong.expect
@@ -1,48 +1,27 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:7:5: Error: Switch case may fall through to the next case.
-//     case 1:
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:13:5: Error: Switch case may fall through to the next case.
-//     case 2:
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:20:5: Error: Switch case may fall through to the next case.
-//     case 3:
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:26:5: Error: Switch case may fall through to the next case.
-//     case 4:
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:31:5: Error: Switch case may fall through to the next case.
-//     case 5:
-//     ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:7:5: Error: Switch case may fall through to the next case.
-//     case 1:
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:13:5: Error: Switch case may fall through to the next case.
-//     case 2:
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:20:5: Error: Switch case may fall through to the next case.
-//     case 3:
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:26:5: Error: Switch case may fall through to the next case.
-//     case 4:
-//     ^
-//
-// pkg/front_end/testcases/rasta/switch_fall_through.dart:31:5: Error: Switch case may fall through to the next case.
-//     case 5:
-//     ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:7:5: Error: Switch case may fall through to the next case.
+//     case 1:
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:13:5: Error: Switch case may fall through to the next case.
+//     case 2:
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:20:5: Error: Switch case may fall through to the next case.
+//     case 3:
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:26:5: Error: Switch case may fall through to the next case.
+//     case 4:
+//     ^
+//
+// pkg/front_end/testcases/rasta/switch_fall_through.dart:31:5: Error: Switch case may fall through to the next case.
+//     case 5:
+//     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/switch_fall_through.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/switch_fall_through.dart.strong.transformed.expect
index 242d0e4..4370b01 100644
--- a/pkg/front_end/testcases/rasta/switch_fall_through.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/switch_fall_through.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/switch_fall_through.dart:7:5: Error: Switch case may fall through to the next case.
 //     case 1:
@@ -19,8 +21,7 @@
 // pkg/front_end/testcases/rasta/switch_fall_through.dart:31:5: Error: Switch case may fall through to the next case.
 //     case 5:
 //     ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/try_label.dart.strong.expect b/pkg/front_end/testcases/rasta/try_label.dart.strong.expect
index 0f4e271..14f6249 100644
--- a/pkg/front_end/testcases/rasta/try_label.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/try_label.dart.strong.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/try_label.dart:9:5: Error: A continue statement can't be used outside of a loop or switch statement.
-// Try removing the continue statement.
-//     continue L;
-//     ^^^^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/try_label.dart:9:5: Error: A continue statement can't be used outside of a loop or switch statement.
-// Try removing the continue statement.
-//     continue L;
-//     ^^^^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/try_label.dart:9:5: Error: A continue statement can't be used outside of a loop or switch statement.
+// Try removing the continue statement.
+//     continue L;
+//     ^^^^^^^^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/try_label.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/try_label.dart.strong.transformed.expect
index 8de56dd..14f6249 100644
--- a/pkg/front_end/testcases/rasta/try_label.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/try_label.dart.strong.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/try_label.dart:9:5: Error: A continue statement can't be used outside of a loop or switch statement.
 // Try removing the continue statement.
 //     continue L;
 //     ^^^^^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/type_literals.dart.strong.expect b/pkg/front_end/testcases/rasta/type_literals.dart.strong.expect
index a0834cd24..c0e22e1 100644
--- a/pkg/front_end/testcases/rasta/type_literals.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/type_literals.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/type_literals.dart:22:5: Error: Method not found: 'dynamic'.
 //     dynamic();
@@ -279,8 +281,7 @@
 // pkg/front_end/testcases/rasta/type_literals.dart:99:9: Error: Setter not found: 'Func'.
 //     use(Func -= 42);
 //         ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/type_with_parse_error.dart.strong.expect b/pkg/front_end/testcases/rasta/type_with_parse_error.dart.strong.expect
index fac7d19..e5baaab 100644
--- a/pkg/front_end/testcases/rasta/type_with_parse_error.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/type_with_parse_error.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/type_with_parse_error.dart:21:7: Error: Expected ';' after this.
-//   int i
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/type_with_parse_error.dart:21:7: Error: Expected ';' after this.
-//   int i
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/type_with_parse_error.dart:21:7: Error: Expected ';' after this.
+//   int i
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/type_with_parse_error.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/type_with_parse_error.dart.strong.transformed.expect
index b8b11cc..e5baaab 100644
--- a/pkg/front_end/testcases/rasta/type_with_parse_error.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/type_with_parse_error.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/type_with_parse_error.dart:21:7: Error: Expected ';' after this.
 //   int i
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/typedef.dart.strong.expect b/pkg/front_end/testcases/rasta/typedef.dart.strong.expect
index 6a68f69..d703c59 100644
--- a/pkg/front_end/testcases/rasta/typedef.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/typedef.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/typedef.dart:9:3: Error: Setter not found: 'Foo'.
 //   Foo = null;
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/rasta/typedef.dart:11:3: Error: Method not found: 'Foo'.
 //   Foo();
 //   ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/unresolved.dart.strong.expect b/pkg/front_end/testcases/rasta/unresolved.dart.strong.expect
index d596412..bc52a62 100644
--- a/pkg/front_end/testcases/rasta/unresolved.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/unresolved.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/unresolved.dart:6:7: Error: Method not found: 'Missing'.
 //   new Missing();
 //       ^^^^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/unresolved.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/unresolved.dart.strong.transformed.expect
index ffc54e6..bc52a62 100644
--- a/pkg/front_end/testcases/rasta/unresolved.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/unresolved.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/unresolved.dart:6:7: Error: Method not found: 'Missing'.
+//   new Missing();
+//       ^^^^^^^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/rasta/unresolved_constructor.dart.strong.expect b/pkg/front_end/testcases/rasta/unresolved_constructor.dart.strong.expect
index f97fa23..0173ed6 100644
--- a/pkg/front_end/testcases/rasta/unresolved_constructor.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/unresolved_constructor.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/unresolved_constructor.dart:10:10: Error: Too few positional arguments: 2 required, 0 given.
 //   new Foo();
@@ -10,8 +12,7 @@
 // pkg/front_end/testcases/rasta/unresolved_constructor.dart:11:11: Error: Method not found: 'Foo.notHere'.
 //   new Foo.notHere();
 //           ^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/unresolved_constructor.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/unresolved_constructor.dart.strong.transformed.expect
index 80c63ba..0173ed6 100644
--- a/pkg/front_end/testcases/rasta/unresolved_constructor.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/unresolved_constructor.dart.strong.transformed.expect
@@ -1,4 +1,18 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/unresolved_constructor.dart:10:10: Error: Too few positional arguments: 2 required, 0 given.
+//   new Foo();
+//          ^
+// pkg/front_end/testcases/rasta/unresolved_constructor.dart:6:3: Context: Found this candidate, but the arguments don't match.
+//   Foo(x, y);
+//   ^
+//
+// pkg/front_end/testcases/rasta/unresolved_constructor.dart:11:11: Error: Method not found: 'Foo.notHere'.
+//   new Foo.notHere();
+//           ^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/unresolved_for_in.dart.legacy.expect b/pkg/front_end/testcases/rasta/unresolved_for_in.dart.legacy.expect
index 907292f..8517ec5 100644
--- a/pkg/front_end/testcases/rasta/unresolved_for_in.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/unresolved_for_in.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/unresolved_for_in.dart:12:13: Warning: Getter not found: 'key'.
 //       print(key);
@@ -71,18 +73,7 @@
 // pkg/front_end/testcases/rasta/unresolved_for_in.dart:43:8: Error: Can't assign to this, so it can't be used in a for-in loop.
 //   for (1 in arguments) {
 //        ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/unresolved_for_in.dart:23:10: Error: Expected an identifier, but got '1'.
-//     for (1 in x) {
-//          ^
-//
-// pkg/front_end/testcases/rasta/unresolved_for_in.dart:43:8: Error: Expected an identifier, but got '1'.
-//   for (1 in arguments) {
-//        ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/unresolved_for_in.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/unresolved_for_in.dart.legacy.transformed.expect
index 4629221..8517ec5 100644
--- a/pkg/front_end/testcases/rasta/unresolved_for_in.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/unresolved_for_in.dart.legacy.transformed.expect
@@ -1,14 +1,79 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:12:13: Warning: Getter not found: 'key'.
+//       print(key);
+//             ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:11:10: Warning: Setter not found: 'key'.
+//     for (key in x) {
+//          ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:14:10: Warning: Setter not found: 'Fisk'.
+//     for (Fisk in x) {
+//          ^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:18:13: Error: A prefix can't be used as an expression.
+//       print(collection);
+//             ^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:17:10: Error: A prefix can't be used as an expression.
+//     for (collection in x) {
+//          ^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:20:10: Warning: Setter not found: 'VoidFunction'.
+//     for (VoidFunction in x) {
+//          ^^^^^^^^^^^^
 //
 // pkg/front_end/testcases/rasta/unresolved_for_in.dart:23:10: Error: Expected an identifier, but got '1'.
 //     for (1 in x) {
 //          ^
 //
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:24:13: Warning: Getter not found: 'key'.
+//       print(key);
+//             ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:23:10: Error: Can't assign to this, so it can't be used in a for-in loop.
+//     for (1 in x) {
+//          ^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:32:11: Warning: Getter not found: 'key'.
+//     print(key);
+//           ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:31:8: Warning: Setter not found: 'key'.
+//   for (key in arguments) {
+//        ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:34:8: Warning: Setter not found: 'Fisk'.
+//   for (Fisk in arguments) {
+//        ^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:38:11: Error: A prefix can't be used as an expression.
+//     print(collection);
+//           ^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:37:8: Error: A prefix can't be used as an expression.
+//   for (collection in arguments) {
+//        ^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:40:8: Warning: Setter not found: 'VoidFunction'.
+//   for (VoidFunction in arguments) {
+//        ^^^^^^^^^^^^
+//
 // pkg/front_end/testcases/rasta/unresolved_for_in.dart:43:8: Error: Expected an identifier, but got '1'.
 //   for (1 in arguments) {
 //        ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:44:11: Warning: Getter not found: 'key'.
+//     print(key);
+//           ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:43:8: Error: Can't assign to this, so it can't be used in a for-in loop.
+//   for (1 in arguments) {
+//        ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/unresolved_for_in.dart.strong.expect b/pkg/front_end/testcases/rasta/unresolved_for_in.dart.strong.expect
index 31ad421..44a5a48 100644
--- a/pkg/front_end/testcases/rasta/unresolved_for_in.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/unresolved_for_in.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/unresolved_for_in.dart:12:13: Error: Getter not found: 'key'.
 //       print(key);
@@ -89,30 +91,7 @@
 // pkg/front_end/testcases/rasta/unresolved_for_in.dart:43:8: Error: Can't assign to this, so it can't be used in a for-in loop.
 //   for (1 in arguments) {
 //        ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/unresolved_for_in.dart:12:13: Error: Getter not found: 'key'.
-//       print(key);
-//             ^^^
-//
-// pkg/front_end/testcases/rasta/unresolved_for_in.dart:11:10: Error: Setter not found: 'key'.
-//     for (key in x) {
-//          ^^^
-//
-// pkg/front_end/testcases/rasta/unresolved_for_in.dart:23:10: Error: Expected an identifier, but got '1'.
-//     for (1 in x) {
-//          ^
-//
-// pkg/front_end/testcases/rasta/unresolved_for_in.dart:24:13: Error: Getter not found: 'key'.
-//       print(key);
-//             ^^^
-//
-// pkg/front_end/testcases/rasta/unresolved_for_in.dart:43:8: Error: Expected an identifier, but got '1'.
-//   for (1 in arguments) {
-//        ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/unresolved_for_in.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/unresolved_for_in.dart.strong.transformed.expect
index 9316b38..be02cbc 100644
--- a/pkg/front_end/testcases/rasta/unresolved_for_in.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/unresolved_for_in.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/unresolved_for_in.dart:12:13: Error: Getter not found: 'key'.
 //       print(key);
@@ -8,6 +10,22 @@
 //     for (key in x) {
 //          ^^^
 //
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:14:10: Error: Setter not found: 'Fisk'.
+//     for (Fisk in x) {
+//          ^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:18:13: Error: A prefix can't be used as an expression.
+//       print(collection);
+//             ^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:17:10: Error: A prefix can't be used as an expression.
+//     for (collection in x) {
+//          ^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:20:10: Error: Setter not found: 'VoidFunction'.
+//     for (VoidFunction in x) {
+//          ^^^^^^^^^^^^
+//
 // pkg/front_end/testcases/rasta/unresolved_for_in.dart:23:10: Error: Expected an identifier, but got '1'.
 //     for (1 in x) {
 //          ^
@@ -16,11 +34,64 @@
 //       print(key);
 //             ^^^
 //
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:23:10: Error: Can't assign to this, so it can't be used in a for-in loop.
+//     for (1 in x) {
+//          ^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:11:10: Error: The setter 'key' isn't defined for the class 'Fisk'.
+//  - 'Fisk' is from 'pkg/front_end/testcases/rasta/unresolved_for_in.dart'.
+// Try correcting the name to the name of an existing setter, or defining a setter or field named 'key'.
+//     for (key in x) {
+//          ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:12:13: Error: The getter 'key' isn't defined for the class 'Fisk'.
+//  - 'Fisk' is from 'pkg/front_end/testcases/rasta/unresolved_for_in.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'key'.
+//       print(key);
+//             ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:24:13: Error: The getter 'key' isn't defined for the class 'Fisk'.
+//  - 'Fisk' is from 'pkg/front_end/testcases/rasta/unresolved_for_in.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'key'.
+//       print(key);
+//             ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:32:11: Error: Getter not found: 'key'.
+//     print(key);
+//           ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:31:8: Error: Setter not found: 'key'.
+//   for (key in arguments) {
+//        ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:34:8: Error: Setter not found: 'Fisk'.
+//   for (Fisk in arguments) {
+//        ^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:38:11: Error: A prefix can't be used as an expression.
+//     print(collection);
+//           ^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:37:8: Error: A prefix can't be used as an expression.
+//   for (collection in arguments) {
+//        ^^^^^^^^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:40:8: Error: Setter not found: 'VoidFunction'.
+//   for (VoidFunction in arguments) {
+//        ^^^^^^^^^^^^
+//
 // pkg/front_end/testcases/rasta/unresolved_for_in.dart:43:8: Error: Expected an identifier, but got '1'.
 //   for (1 in arguments) {
 //        ^
-
-library;
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:44:11: Error: Getter not found: 'key'.
+//     print(key);
+//           ^^^
+//
+// pkg/front_end/testcases/rasta/unresolved_for_in.dart:43:8: Error: Can't assign to this, so it can't be used in a for-in loop.
+//   for (1 in arguments) {
+//        ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/unresolved_recovery.dart.strong.expect b/pkg/front_end/testcases/rasta/unresolved_recovery.dart.strong.expect
index 77aeb40..bcaa50f 100644
--- a/pkg/front_end/testcases/rasta/unresolved_recovery.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/unresolved_recovery.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/rasta/unresolved_recovery.dart:7:10: Error: Superclass has no method named '[]='.
 //     super[4] = 42;
@@ -39,42 +41,7 @@
 // pkg/front_end/testcases/rasta/unresolved_recovery.dart:20:24: Error: Expected ';' after this.
 //   on Exception catch (e) { }
 //                        ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/rasta/unresolved_recovery.dart:7:10: Error: Superclass has no method named '[]='.
-//     super[4] = 42;
-//          ^
-//
-// pkg/front_end/testcases/rasta/unresolved_recovery.dart:8:10: Error: Superclass has no method named '[]'.
-//     super[4] += 5;
-//          ^
-//
-// pkg/front_end/testcases/rasta/unresolved_recovery.dart:8:10: Error: Superclass has no method named '[]='.
-//     super[4] += 5;
-//          ^
-//
-// pkg/front_end/testcases/rasta/unresolved_recovery.dart:9:17: Error: Superclass has no method named '[]'.
-//     return super[2];
-//                 ^
-//
-// pkg/front_end/testcases/rasta/unresolved_recovery.dart:20:3: Error: 'on' isn't a type.
-//   on Exception catch (e) { }
-//   ^^
-//
-// pkg/front_end/testcases/rasta/unresolved_recovery.dart:20:6: Error: Expected ';' after this.
-//   on Exception catch (e) { }
-//      ^^^^^^^^^
-//
-// pkg/front_end/testcases/rasta/unresolved_recovery.dart:20:16: Error: Expected an identifier, but got 'catch'.
-//   on Exception catch (e) { }
-//                ^^^^^
-//
-// pkg/front_end/testcases/rasta/unresolved_recovery.dart:20:24: Error: Expected ';' after this.
-//   on Exception catch (e) { }
-//                        ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.legacy.expect b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.legacy.expect
index c6efc4b..bef6d48 100644
--- a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.legacy.expect
+++ b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.legacy.expect
@@ -1,15 +1,3 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/unsupported_platform_library.dart:5:8: Error: Not found: 'dart:html'
-// import 'dart:html';
-//        ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/unsupported_platform_library.dart:5:8: Error: Not found: 'dart:html'
-// import 'dart:html';
-//        ^
-
 library;
 import self as self;
 
diff --git a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.legacy.transformed.expect b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.legacy.transformed.expect
index b3ae1f4..bef6d48 100644
--- a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.legacy.transformed.expect
@@ -1,9 +1,3 @@
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/unsupported_platform_library.dart:5:8: Error: Not found: 'dart:html'
-// import 'dart:html';
-//        ^
-
 library;
 import self as self;
 
diff --git a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.outline.expect b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.outline.expect
index 9edee97..6a28c0d 100644
--- a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.outline.expect
+++ b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.outline.expect
@@ -1,9 +1,3 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/unsupported_platform_library.dart:5:8: Error: Not found: 'dart:html'
-// import 'dart:html';
-//        ^
-
 library;
 import self as self;
 
diff --git a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.strong.expect b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.strong.expect
index c6efc4b..bef6d48 100644
--- a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.strong.expect
+++ b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.strong.expect
@@ -1,15 +1,3 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/rasta/unsupported_platform_library.dart:5:8: Error: Not found: 'dart:html'
-// import 'dart:html';
-//        ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/unsupported_platform_library.dart:5:8: Error: Not found: 'dart:html'
-// import 'dart:html';
-//        ^
-
 library;
 import self as self;
 
diff --git a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.strong.transformed.expect b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.strong.transformed.expect
index b3ae1f4..bef6d48 100644
--- a/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/rasta/unsupported_platform_library.dart.strong.transformed.expect
@@ -1,9 +1,3 @@
-// Unhandled errors:
-//
-// pkg/front_end/testcases/rasta/unsupported_platform_library.dart:5:8: Error: Not found: 'dart:html'
-// import 'dart:html';
-//        ^
-
 library;
 import self as self;
 
diff --git a/pkg/front_end/testcases/redirecting_factory.dart.strong.expect b/pkg/front_end/testcases/redirecting_factory.dart.strong.expect
index bcf4fb8..76a019a 100644
--- a/pkg/front_end/testcases/redirecting_factory.dart.strong.expect
+++ b/pkg/front_end/testcases/redirecting_factory.dart.strong.expect
@@ -1,20 +1,13 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/redirecting_factory.dart:7:28: Error: The constructor function type 'Foo<Tf> Function(int)' isn't a subtype of 'FooBase<Tf> Function(int)'.
-//  - 'Foo' is from 'pkg/front_end/testcases/redirecting_factory.dart'.
-//  - 'FooBase' is from 'pkg/front_end/testcases/redirecting_factory.dart'.
-//   factory FooBase(int x) = Foo<Tf>;
-//                            ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/redirecting_factory.dart:7:28: Error: The constructor function type 'Foo<Tf> Function(int)' isn't a subtype of 'FooBase<Tf> Function(int)'.
-//  - 'Foo' is from 'pkg/front_end/testcases/redirecting_factory.dart'.
-//  - 'FooBase' is from 'pkg/front_end/testcases/redirecting_factory.dart'.
-//   factory FooBase(int x) = Foo<Tf>;
-//                            ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/redirecting_factory.dart:7:28: Error: The constructor function type 'Foo<Tf> Function(int)' isn't a subtype of 'FooBase<Tf> Function(int)'.
+//  - 'Foo' is from 'pkg/front_end/testcases/redirecting_factory.dart'.
+//  - 'FooBase' is from 'pkg/front_end/testcases/redirecting_factory.dart'.
+//   factory FooBase(int x) = Foo<Tf>;
+//                            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/redirecting_factory.dart.strong.transformed.expect b/pkg/front_end/testcases/redirecting_factory.dart.strong.transformed.expect
index 4885beb..ab86769 100644
--- a/pkg/front_end/testcases/redirecting_factory.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/redirecting_factory.dart.strong.transformed.expect
@@ -1,12 +1,13 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/redirecting_factory.dart:7:28: Error: The constructor function type 'Foo<Tf> Function(int)' isn't a subtype of 'FooBase<Tf> Function(int)'.
 //  - 'Foo' is from 'pkg/front_end/testcases/redirecting_factory.dart'.
 //  - 'FooBase' is from 'pkg/front_end/testcases/redirecting_factory.dart'.
 //   factory FooBase(int x) = Foo<Tf>;
 //                            ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/redirecting_initializer_arguments_test.dart.strong.expect b/pkg/front_end/testcases/redirecting_initializer_arguments_test.dart.strong.expect
index 3a358ad..2856067 100644
--- a/pkg/front_end/testcases/redirecting_initializer_arguments_test.dart.strong.expect
+++ b/pkg/front_end/testcases/redirecting_initializer_arguments_test.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/redirecting_initializer_arguments_test.dart:12:46: Error: The argument type 'String' can't be assigned to the parameter type 'T'.
 // Try changing the type of the parameter, or casting the argument to 'T'.
 //   Foo.from(String _init) : this._internal(x: _init);
 //                                              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/redirecting_initializer_arguments_test.dart.strong.transformed.expect b/pkg/front_end/testcases/redirecting_initializer_arguments_test.dart.strong.transformed.expect
index 4a7fde2..2856067 100644
--- a/pkg/front_end/testcases/redirecting_initializer_arguments_test.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/redirecting_initializer_arguments_test.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/redirecting_initializer_arguments_test.dart:12:46: Error: The argument type 'String' can't be assigned to the parameter type 'T'.
+// Try changing the type of the parameter, or casting the argument to 'T'.
+//   Foo.from(String _init) : this._internal(x: _init);
+//                                              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29937.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29937.dart.legacy.expect
index be87a73..c900857 100644
--- a/pkg/front_end/testcases/regress/issue_29937.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29937.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29937.dart:6:4: Error: A function expression can't have a name.
-//   [f() {}];
-//    ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29937.dart:6:4: Error: A function expression can't have a name.
-//   [f() {}];
-//    ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29937.dart:6:4: Error: A function expression can't have a name.
+//   [f() {}];
+//    ^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29937.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29937.dart.legacy.transformed.expect
index 3232e26..c900857 100644
--- a/pkg/front_end/testcases/regress/issue_29937.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29937.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29937.dart:6:4: Error: A function expression can't have a name.
 //   [f() {}];
 //    ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29937.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29937.dart.strong.expect
index 6872ff5..5f4a24f 100644
--- a/pkg/front_end/testcases/regress/issue_29937.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29937.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29937.dart:6:4: Error: A function expression can't have a name.
-//   [f() {}];
-//    ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29937.dart:6:4: Error: A function expression can't have a name.
-//   [f() {}];
-//    ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29937.dart:6:4: Error: A function expression can't have a name.
+//   [f() {}];
+//    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29937.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29937.dart.strong.transformed.expect
index 87fc344..5f4a24f 100644
--- a/pkg/front_end/testcases/regress/issue_29937.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29937.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29937.dart:6:4: Error: A function expression can't have a name.
 //   [f() {}];
 //    ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29940.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29940.dart.legacy.expect
index 4a7fdf3..83c805a 100644
--- a/pkg/front_end/testcases/regress/issue_29940.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29940.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29940.dart:7:3: Warning: 'a.b' can't be used as a type because 'a' doesn't refer to an import prefix.
 //   a.b c = null;
 //   ^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29940.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29940.dart.legacy.transformed.expect
index b13d5e8..83c805a 100644
--- a/pkg/front_end/testcases/regress/issue_29940.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29940.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29940.dart:7:3: Warning: 'a.b' can't be used as a type because 'a' doesn't refer to an import prefix.
+//   a.b c = null;
+//   ^^^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29940.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29940.dart.strong.expect
index 00641a9..106be2a 100644
--- a/pkg/front_end/testcases/regress/issue_29940.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29940.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29940.dart:7:3: Error: 'a.b' can't be used as a type because 'a' doesn't refer to an import prefix.
-//   a.b c = null;
-//   ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29940.dart:7:3: Error: 'a.b' can't be used as a type because 'a' doesn't refer to an import prefix.
-//   a.b c = null;
-//   ^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29940.dart:7:3: Error: 'a.b' can't be used as a type because 'a' doesn't refer to an import prefix.
+//   a.b c = null;
+//   ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29940.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29940.dart.strong.transformed.expect
index 0d0ae79..106be2a 100644
--- a/pkg/front_end/testcases/regress/issue_29940.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29940.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29940.dart:7:3: Error: 'a.b' can't be used as a type because 'a' doesn't refer to an import prefix.
 //   a.b c = null;
 //   ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29941.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29941.dart.legacy.expect
index 7d8e0ac..37a2a3e 100644
--- a/pkg/front_end/testcases/regress/issue_29941.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29941.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29941.dart:7:5: Error: Expected an identifier, but got '""'.
 //   a."";
 //     ^^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29941.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29941.dart.legacy.transformed.expect
index eea6787..37a2a3e 100644
--- a/pkg/front_end/testcases/regress/issue_29941.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29941.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29941.dart:7:5: Error: Expected an identifier, but got '""'.
+//   a."";
+//     ^^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29941.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29941.dart.strong.expect
index 8d219da..d9bc977 100644
--- a/pkg/front_end/testcases/regress/issue_29941.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29941.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29941.dart:7:5: Error: Expected an identifier, but got '""'.
 //   a."";
 //     ^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29941.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29941.dart.strong.transformed.expect
index 5c24424..d9bc977 100644
--- a/pkg/front_end/testcases/regress/issue_29941.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29941.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29941.dart:7:5: Error: Expected an identifier, but got '""'.
+//   a."";
+//     ^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29942.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29942.dart.legacy.expect
index f278bcd..e96195a 100644
--- a/pkg/front_end/testcases/regress/issue_29942.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29942.dart.legacy.expect
@@ -1,26 +1,16 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29942.dart:8:5: Error: Expected a function body or '=>'.
-// Try adding {}.
-// f() =
-//     ^
-//
-// pkg/front_end/testcases/regress/issue_29942.dart:10:1: Error: A function expression can't have a name.
-// h() => null;
-// ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29942.dart:8:5: Error: Expected a function body or '=>'.
-// Try adding {}.
-// f() =
-//     ^
-//
-// pkg/front_end/testcases/regress/issue_29942.dart:10:1: Error: A function expression can't have a name.
-// h() => null;
-// ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29942.dart:8:5: Error: Expected a function body or '=>'.
+// Try adding {}.
+// f() =
+//     ^
+//
+// pkg/front_end/testcases/regress/issue_29942.dart:10:1: Error: A function expression can't have a name.
+// h() => null;
+// ^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29942.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29942.dart.legacy.transformed.expect
index b45be16..e96195a 100644
--- a/pkg/front_end/testcases/regress/issue_29942.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29942.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29942.dart:8:5: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -8,8 +10,7 @@
 // pkg/front_end/testcases/regress/issue_29942.dart:10:1: Error: A function expression can't have a name.
 // h() => null;
 // ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29942.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29942.dart.outline.expect
index cedaf70..1f16ad6 100644
--- a/pkg/front_end/testcases/regress/issue_29942.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_29942.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29942.dart:8:5: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -8,8 +10,7 @@
 // pkg/front_end/testcases/regress/issue_29942.dart:10:1: Error: A function expression can't have a name.
 // h() => null;
 // ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29942.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29942.dart.strong.expect
index 39a4246..277a448 100644
--- a/pkg/front_end/testcases/regress/issue_29942.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29942.dart.strong.expect
@@ -1,26 +1,16 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29942.dart:8:5: Error: Expected a function body or '=>'.
-// Try adding {}.
-// f() =
-//     ^
-//
-// pkg/front_end/testcases/regress/issue_29942.dart:10:1: Error: A function expression can't have a name.
-// h() => null;
-// ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29942.dart:8:5: Error: Expected a function body or '=>'.
-// Try adding {}.
-// f() =
-//     ^
-//
-// pkg/front_end/testcases/regress/issue_29942.dart:10:1: Error: A function expression can't have a name.
-// h() => null;
-// ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29942.dart:8:5: Error: Expected a function body or '=>'.
+// Try adding {}.
+// f() =
+//     ^
+//
+// pkg/front_end/testcases/regress/issue_29942.dart:10:1: Error: A function expression can't have a name.
+// h() => null;
+// ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29942.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29942.dart.strong.transformed.expect
index ef6dd3f..277a448 100644
--- a/pkg/front_end/testcases/regress/issue_29942.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29942.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29942.dart:8:5: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -8,8 +10,7 @@
 // pkg/front_end/testcases/regress/issue_29942.dart:10:1: Error: A function expression can't have a name.
 // h() => null;
 // ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29943.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29943.dart.legacy.expect
index 163bc19..4684ec6 100644
--- a/pkg/front_end/testcases/regress/issue_29943.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29943.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29943.dart:6:5: Error: Expected an identifier, but got '('.
 //   x.(null);
 //     ^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29943.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29943.dart.legacy.transformed.expect
index 69b4062..4684ec6 100644
--- a/pkg/front_end/testcases/regress/issue_29943.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29943.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29943.dart:6:5: Error: Expected an identifier, but got '('.
+//   x.(null);
+//     ^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29943.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29943.dart.strong.expect
index 163bc19..4684ec6 100644
--- a/pkg/front_end/testcases/regress/issue_29943.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29943.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29943.dart:6:5: Error: Expected an identifier, but got '('.
 //   x.(null);
 //     ^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29943.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29943.dart.strong.transformed.expect
index 69b4062..4684ec6 100644
--- a/pkg/front_end/testcases/regress/issue_29943.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29943.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29943.dart:6:5: Error: Expected an identifier, but got '('.
+//   x.(null);
+//     ^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29944.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29944.dart.legacy.expect
index e6a419d..f598d94 100644
--- a/pkg/front_end/testcases/regress/issue_29944.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29944.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29944.dart:7:7: Error: A class member can't have the same name as the enclosing class.
-//   var C;
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29944.dart:7:7: Error: A class member can't have the same name as the enclosing class.
-//   var C;
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29944.dart:7:7: Error: A class member can't have the same name as the enclosing class.
+//   var C;
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29944.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29944.dart.legacy.transformed.expect
index d3ab9b2..f598d94 100644
--- a/pkg/front_end/testcases/regress/issue_29944.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29944.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29944.dart:7:7: Error: A class member can't have the same name as the enclosing class.
 //   var C;
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29944.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29944.dart.outline.expect
index cc5aa07..33037ab 100644
--- a/pkg/front_end/testcases/regress/issue_29944.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_29944.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29944.dart:7:7: Error: A class member can't have the same name as the enclosing class.
 //   var C;
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29944.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29944.dart.strong.expect
index e6a419d..f598d94 100644
--- a/pkg/front_end/testcases/regress/issue_29944.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29944.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29944.dart:7:7: Error: A class member can't have the same name as the enclosing class.
-//   var C;
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29944.dart:7:7: Error: A class member can't have the same name as the enclosing class.
-//   var C;
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29944.dart:7:7: Error: A class member can't have the same name as the enclosing class.
+//   var C;
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29944.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29944.dart.strong.transformed.expect
index d3ab9b2..f598d94 100644
--- a/pkg/front_end/testcases/regress/issue_29944.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29944.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29944.dart:7:7: Error: A class member can't have the same name as the enclosing class.
 //   var C;
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29945.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29945.dart.legacy.expect
index 34da2814..7a2f7d1 100644
--- a/pkg/front_end/testcases/regress/issue_29945.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29945.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29945.dart:6:3: Warning: 's.bool' can't be used as a type because 's' isn't defined.
 //   s.bool x = null;
 //   ^^^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29945.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29945.dart.legacy.transformed.expect
index 186616b..7a2f7d1 100644
--- a/pkg/front_end/testcases/regress/issue_29945.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29945.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29945.dart:6:3: Warning: 's.bool' can't be used as a type because 's' isn't defined.
+//   s.bool x = null;
+//   ^^^^^^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29945.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29945.dart.strong.expect
index 0215a73..038a3a7 100644
--- a/pkg/front_end/testcases/regress/issue_29945.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29945.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29945.dart:6:3: Error: 's.bool' can't be used as a type because 's' isn't defined.
-//   s.bool x = null;
-//   ^^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29945.dart:6:3: Error: 's.bool' can't be used as a type because 's' isn't defined.
-//   s.bool x = null;
-//   ^^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29945.dart:6:3: Error: 's.bool' can't be used as a type because 's' isn't defined.
+//   s.bool x = null;
+//   ^^^^^^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29945.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29945.dart.strong.transformed.expect
index da35f2c..038a3a7 100644
--- a/pkg/front_end/testcases/regress/issue_29945.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29945.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29945.dart:6:3: Error: 's.bool' can't be used as a type because 's' isn't defined.
 //   s.bool x = null;
 //   ^^^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29975.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29975.dart.outline.expect
index c49120e..4ebde45 100644
--- a/pkg/front_end/testcases/regress/issue_29975.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_29975.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29975.dart:6:14: Error: 'F' is already declared in this scope.
 // typedef void F();
@@ -6,8 +8,7 @@
 // pkg/front_end/testcases/regress/issue_29975.dart:5:14: Context: Previous declaration of 'F'.
 // typedef void F();
 //              ^
-
-library;
+//
 import self as self;
 
 typedef F = () → void;
diff --git a/pkg/front_end/testcases/regress/issue_29975.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29975.dart.strong.expect
index 93d444f..44014e5 100644
--- a/pkg/front_end/testcases/regress/issue_29975.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29975.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29975.dart:6:14: Error: 'F' is already declared in this scope.
 // typedef void F();
@@ -6,14 +8,7 @@
 // pkg/front_end/testcases/regress/issue_29975.dart:5:14: Context: Previous declaration of 'F'.
 // typedef void F();
 //              ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_29975.dart:6:14: Error: 'F' is already declared in this scope.
-// typedef void F();
-//              ^
-
-library;
 import self as self;
 
 typedef F = () → void;
diff --git a/pkg/front_end/testcases/regress/issue_29975.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29975.dart.strong.transformed.expect
index 6dc716b..44014e5 100644
--- a/pkg/front_end/testcases/regress/issue_29975.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29975.dart.strong.transformed.expect
@@ -1,10 +1,14 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29975.dart:6:14: Error: 'F' is already declared in this scope.
 // typedef void F();
 //              ^
-
-library;
+// pkg/front_end/testcases/regress/issue_29975.dart:5:14: Context: Previous declaration of 'F'.
+// typedef void F();
+//              ^
+//
 import self as self;
 
 typedef F = () → void;
diff --git a/pkg/front_end/testcases/regress/issue_29976.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29976.dart.legacy.expect
index f434e4b..467f45c 100644
--- a/pkg/front_end/testcases/regress/issue_29976.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29976.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29976.dart:9:14: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -34,41 +36,7 @@
 // pkg/front_end/testcases/regress/issue_29976.dart:10:3: Error: Expected ';' after this.
 //   )
 //   ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_29976.dart:9:14: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-//     "x${x*"'"é'}x
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:9:15: Error: String starting with ' must end with '.
-//     "x${x*"'"é'}x
-//               ^^^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:9:7: Error: Can't find '}' to match '${'.
-//     "x${x*"'"é'}x
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:9:5: Error: String starting with " must end with ".
-//     "x${x*"'"é'}x
-//     ^^^^^^^^^^^^^^...
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:12:1: Error: Expected a declaration, but got ''.
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:9:14: Error: Expected '}' before this.
-//     "x${x*"'"é'}x
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:10:3: Error: Expected a String, but got ')'.
-//   )
-//   ^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:10:3: Error: Expected ';' after this.
-//   )
-//   ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29976.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29976.dart.legacy.transformed.expect
index ea4c4a8..467f45c 100644
--- a/pkg/front_end/testcases/regress/issue_29976.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29976.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29976.dart:9:14: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -27,11 +29,14 @@
 //   )
 //   ^
 //
+// pkg/front_end/testcases/regress/issue_29976.dart:8:3: Warning: Method not found: 'f'.
+//   f(
+//   ^
+//
 // pkg/front_end/testcases/regress/issue_29976.dart:10:3: Error: Expected ';' after this.
 //   )
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29976.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29976.dart.outline.expect
index b796c52..e1cb793 100644
--- a/pkg/front_end/testcases/regress/issue_29976.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_29976.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29976.dart:9:14: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -18,8 +20,7 @@
 //     ^^^^^^^^^^^^^^...
 //
 // pkg/front_end/testcases/regress/issue_29976.dart:12:1: Error: Expected a declaration, but got ''.
-
-library;
+//
 import self as self;
 
 static get x() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29976.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29976.dart.strong.expect
index 72e0f84..b65bb80 100644
--- a/pkg/front_end/testcases/regress/issue_29976.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29976.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29976.dart:9:14: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -34,41 +36,7 @@
 // pkg/front_end/testcases/regress/issue_29976.dart:10:3: Error: Expected ';' after this.
 //   )
 //   ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_29976.dart:9:14: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-//     "x${x*"'"é'}x
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:9:15: Error: String starting with ' must end with '.
-//     "x${x*"'"é'}x
-//               ^^^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:9:7: Error: Can't find '}' to match '${'.
-//     "x${x*"'"é'}x
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:9:5: Error: String starting with " must end with ".
-//     "x${x*"'"é'}x
-//     ^^^^^^^^^^^^^^...
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:12:1: Error: Expected a declaration, but got ''.
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:9:14: Error: Expected '}' before this.
-//     "x${x*"'"é'}x
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:10:3: Error: Expected a String, but got ')'.
-//   )
-//   ^
-//
-// pkg/front_end/testcases/regress/issue_29976.dart:10:3: Error: Expected ';' after this.
-//   )
-//   ^
-
-library;
 import self as self;
 
 static get x() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29976.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29976.dart.strong.transformed.expect
index 8c288dc..b65bb80 100644
--- a/pkg/front_end/testcases/regress/issue_29976.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29976.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29976.dart:9:14: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -27,11 +29,14 @@
 //   )
 //   ^
 //
+// pkg/front_end/testcases/regress/issue_29976.dart:8:3: Error: Method not found: 'f'.
+//   f(
+//   ^
+//
 // pkg/front_end/testcases/regress/issue_29976.dart:10:3: Error: Expected ';' after this.
 //   )
 //   ^
-
-library;
+//
 import self as self;
 
 static get x() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29977.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29977.dart.legacy.expect
index 2e676e4..27a1465 100644
--- a/pkg/front_end/testcases/regress/issue_29977.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29977.dart.legacy.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29977.dart:5:19: Error: Couldn't parse URI 'data:async':
-//   Invalid MIME type.
-// import 'data:async';
-//                   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29977.dart:5:19: Error: Couldn't parse URI 'data:async':
-//   Invalid MIME type.
-// import 'data:async';
-//                   ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29977.dart:5:19: Error: Couldn't parse URI 'data:async':
+//   Invalid MIME type.
+// import 'data:async';
+//                   ^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29977.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29977.dart.legacy.transformed.expect
index 262ff05..27a1465 100644
--- a/pkg/front_end/testcases/regress/issue_29977.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29977.dart.legacy.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29977.dart:5:19: Error: Couldn't parse URI 'data:async':
 //   Invalid MIME type.
 // import 'data:async';
 //                   ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29977.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29977.dart.outline.expect
index 33e2d4e..e858eaf 100644
--- a/pkg/front_end/testcases/regress/issue_29977.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_29977.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29977.dart:5:19: Error: Couldn't parse URI 'data:async':
 //   Invalid MIME type.
 // import 'data:async';
 //                   ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29977.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29977.dart.strong.expect
index 2e676e4..27a1465 100644
--- a/pkg/front_end/testcases/regress/issue_29977.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29977.dart.strong.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29977.dart:5:19: Error: Couldn't parse URI 'data:async':
-//   Invalid MIME type.
-// import 'data:async';
-//                   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29977.dart:5:19: Error: Couldn't parse URI 'data:async':
-//   Invalid MIME type.
-// import 'data:async';
-//                   ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29977.dart:5:19: Error: Couldn't parse URI 'data:async':
+//   Invalid MIME type.
+// import 'data:async';
+//                   ^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29977.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29977.dart.strong.transformed.expect
index 262ff05..27a1465 100644
--- a/pkg/front_end/testcases/regress/issue_29977.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29977.dart.strong.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29977.dart:5:19: Error: Couldn't parse URI 'data:async':
 //   Invalid MIME type.
 // import 'data:async';
 //                   ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29978.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29978.dart.legacy.expect
index e883dbf..fee49f7 100644
--- a/pkg/front_end/testcases/regress/issue_29978.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29978.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29978.dart:8:13: Error: A function expression can't have a name.
-//   foo(null, f() {});
-//             ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29978.dart:8:13: Error: A function expression can't have a name.
-//   foo(null, f() {});
-//             ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29978.dart:8:13: Error: A function expression can't have a name.
+//   foo(null, f() {});
+//             ^
+//
 import self as self;
 
 static method foo(dynamic a, dynamic b) → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29978.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29978.dart.legacy.transformed.expect
index 62cb849..fee49f7 100644
--- a/pkg/front_end/testcases/regress/issue_29978.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29978.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29978.dart:8:13: Error: A function expression can't have a name.
 //   foo(null, f() {});
 //             ^
-
-library;
+//
 import self as self;
 
 static method foo(dynamic a, dynamic b) → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29978.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29978.dart.strong.expect
index a15db2b..e9b8c86 100644
--- a/pkg/front_end/testcases/regress/issue_29978.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29978.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29978.dart:8:13: Error: A function expression can't have a name.
-//   foo(null, f() {});
-//             ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29978.dart:8:13: Error: A function expression can't have a name.
-//   foo(null, f() {});
-//             ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29978.dart:8:13: Error: A function expression can't have a name.
+//   foo(null, f() {});
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29978.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29978.dart.strong.transformed.expect
index 6a94d34..e9b8c86 100644
--- a/pkg/front_end/testcases/regress/issue_29978.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29978.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29978.dart:8:13: Error: A function expression can't have a name.
 //   foo(null, f() {});
 //             ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29979.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29979.dart.legacy.expect
index 2df3c7c..a77e172 100644
--- a/pkg/front_end/testcases/regress/issue_29979.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29979.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29979.dart:6:4: Error: A function expression can't have a name.
-//   (f() {})();
-//    ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29979.dart:6:4: Error: A function expression can't have a name.
-//   (f() {})();
-//    ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29979.dart:6:4: Error: A function expression can't have a name.
+//   (f() {})();
+//    ^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29979.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29979.dart.legacy.transformed.expect
index f556c17..a77e172 100644
--- a/pkg/front_end/testcases/regress/issue_29979.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29979.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29979.dart:6:4: Error: A function expression can't have a name.
 //   (f() {})();
 //    ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29979.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29979.dart.strong.expect
index e9dc062..c9e4888 100644
--- a/pkg/front_end/testcases/regress/issue_29979.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29979.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29979.dart:6:4: Error: A function expression can't have a name.
-//   (f() {})();
-//    ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29979.dart:6:4: Error: A function expression can't have a name.
-//   (f() {})();
-//    ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29979.dart:6:4: Error: A function expression can't have a name.
+//   (f() {})();
+//    ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29979.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29979.dart.strong.transformed.expect
index aafb742..c9e4888 100644
--- a/pkg/front_end/testcases/regress/issue_29979.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29979.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29979.dart:6:4: Error: A function expression can't have a name.
 //   (f() {})();
 //    ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29980.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29980.dart.legacy.expect
index c2b6598..23d7054 100644
--- a/pkg/front_end/testcases/regress/issue_29980.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29980.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29980.dart:6:3: Warning: 'x.y' can't be used as a type because 'x' isn't defined.
 //   x.y z;
 //   ^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29980.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29980.dart.legacy.transformed.expect
index 15d1958..23d7054 100644
--- a/pkg/front_end/testcases/regress/issue_29980.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29980.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29980.dart:6:3: Warning: 'x.y' can't be used as a type because 'x' isn't defined.
+//   x.y z;
+//   ^^^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29980.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29980.dart.strong.expect
index d313908..1e683cf 100644
--- a/pkg/front_end/testcases/regress/issue_29980.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29980.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29980.dart:6:3: Error: 'x.y' can't be used as a type because 'x' isn't defined.
-//   x.y z;
-//   ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29980.dart:6:3: Error: 'x.y' can't be used as a type because 'x' isn't defined.
-//   x.y z;
-//   ^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29980.dart:6:3: Error: 'x.y' can't be used as a type because 'x' isn't defined.
+//   x.y z;
+//   ^^^
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29980.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29980.dart.strong.transformed.expect
index c271e3e..1e683cf 100644
--- a/pkg/front_end/testcases/regress/issue_29980.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29980.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29980.dart:6:3: Error: 'x.y' can't be used as a type because 'x' isn't defined.
 //   x.y z;
 //   ^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29981.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29981.dart.legacy.expect
index 2d805d8..1019310 100644
--- a/pkg/front_end/testcases/regress/issue_29981.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29981.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29981.dart:6:3: Warning: Expected 1 type arguments.
 //   C<String, String> field;
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29981.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29981.dart.legacy.transformed.expect
index 483a0c4..1019310 100644
--- a/pkg/front_end/testcases/regress/issue_29981.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29981.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29981.dart:6:3: Warning: Expected 1 type arguments.
+//   C<String, String> field;
+//   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29981.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29981.dart.strong.expect
index d746374..02e45d1 100644
--- a/pkg/front_end/testcases/regress/issue_29981.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29981.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29981.dart:6:3: Error: Expected 1 type arguments.
-//   C<String, String> field;
-//   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29981.dart:6:3: Error: Expected 1 type arguments.
-//   C<String, String> field;
-//   ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29981.dart:6:3: Error: Expected 1 type arguments.
+//   C<String, String> field;
+//   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29981.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29981.dart.strong.transformed.expect
index a4f22b0..02e45d1 100644
--- a/pkg/front_end/testcases/regress/issue_29981.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29981.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29981.dart:6:3: Error: Expected 1 type arguments.
 //   C<String, String> field;
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29982.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29982.dart.legacy.expect
index e361b02..e7b79bd 100644
--- a/pkg/front_end/testcases/regress/issue_29982.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29982.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29982.dart:7:15: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -34,41 +36,7 @@
 // pkg/front_end/testcases/regress/issue_29982.dart:7:21: Error: Expected a String, but got ')'.
 //   print('${eh[éh']}');
 //                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_29982.dart:7:15: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-//   print('${eh[éh']}');
-//               ^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:14: Error: Can't find ']' to match '['.
-//   print('${eh[éh']}');
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:10: Error: Can't find '}' to match '${'.
-//   print('${eh[éh']}');
-//          ^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:11: Error: String starting with ' must end with '.
-//   print('${eh[éh']}');
-//           ^^^^^^^^^^^^^...
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:9:1: Error: Expected a declaration, but got ''.
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:17: Error: Expected ']' before this.
-//   print('${eh[éh']}');
-//                 ^^^^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:17: Error: Expected '}' before this.
-//   print('${eh[éh']}');
-//                 ^^^^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:21: Error: Expected a String, but got ')'.
-//   print('${eh[éh']}');
-//                     ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29982.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29982.dart.legacy.transformed.expect
index f419a37..e7b79bd 100644
--- a/pkg/front_end/testcases/regress/issue_29982.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29982.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29982.dart:7:15: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -23,6 +25,10 @@
 //   print('${eh[éh']}');
 //                 ^^^^
 //
+// pkg/front_end/testcases/regress/issue_29982.dart:7:15: Warning: Getter not found: 'éh'.
+//   print('${eh[éh']}');
+//               ^^
+//
 // pkg/front_end/testcases/regress/issue_29982.dart:7:17: Error: Expected '}' before this.
 //   print('${eh[éh']}');
 //                 ^^^^
@@ -30,8 +36,7 @@
 // pkg/front_end/testcases/regress/issue_29982.dart:7:21: Error: Expected a String, but got ')'.
 //   print('${eh[éh']}');
 //                     ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29982.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29982.dart.outline.expect
index 28ba42c..2b7388c 100644
--- a/pkg/front_end/testcases/regress/issue_29982.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_29982.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29982.dart:7:15: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -18,8 +20,7 @@
 //           ^^^^^^^^^^^^^...
 //
 // pkg/front_end/testcases/regress/issue_29982.dart:9:1: Error: Expected a declaration, but got ''.
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29982.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29982.dart.strong.expect
index cbd79b7..b69a45b 100644
--- a/pkg/front_end/testcases/regress/issue_29982.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29982.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29982.dart:7:15: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -34,41 +36,7 @@
 // pkg/front_end/testcases/regress/issue_29982.dart:7:21: Error: Expected a String, but got ')'.
 //   print('${eh[éh']}');
 //                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_29982.dart:7:15: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-//   print('${eh[éh']}');
-//               ^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:14: Error: Can't find ']' to match '['.
-//   print('${eh[éh']}');
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:10: Error: Can't find '}' to match '${'.
-//   print('${eh[éh']}');
-//          ^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:11: Error: String starting with ' must end with '.
-//   print('${eh[éh']}');
-//           ^^^^^^^^^^^^^...
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:9:1: Error: Expected a declaration, but got ''.
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:17: Error: Expected ']' before this.
-//   print('${eh[éh']}');
-//                 ^^^^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:17: Error: Expected '}' before this.
-//   print('${eh[éh']}');
-//                 ^^^^
-//
-// pkg/front_end/testcases/regress/issue_29982.dart:7:21: Error: Expected a String, but got ')'.
-//   print('${eh[éh']}');
-//                     ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29982.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29982.dart.strong.transformed.expect
index e9542e0..b69a45b 100644
--- a/pkg/front_end/testcases/regress/issue_29982.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29982.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29982.dart:7:15: Error: The non-ASCII character 'é' (U+00E9) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -23,6 +25,10 @@
 //   print('${eh[éh']}');
 //                 ^^^^
 //
+// pkg/front_end/testcases/regress/issue_29982.dart:7:15: Error: Getter not found: 'éh'.
+//   print('${eh[éh']}');
+//               ^^
+//
 // pkg/front_end/testcases/regress/issue_29982.dart:7:17: Error: Expected '}' before this.
 //   print('${eh[éh']}');
 //                 ^^^^
@@ -30,8 +36,7 @@
 // pkg/front_end/testcases/regress/issue_29982.dart:7:21: Error: Expected a String, but got ')'.
 //   print('${eh[éh']}');
 //                     ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29983.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29983.dart.legacy.expect
index 0043c08..a1d160d 100644
--- a/pkg/front_end/testcases/regress/issue_29983.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29983.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29983.dart:7:10: Warning: Getter not found: 'missing'.
 //   return missing;
@@ -15,8 +17,7 @@
 // pkg/front_end/testcases/regress/issue_29983.dart:11:14: Error: 'sync*' and 'async*' can't return a value.
 // g() sync* => dummy;
 //              ^
-
-library;
+//
 import self as self;
 
 static method f() → dynamic sync* {
diff --git a/pkg/front_end/testcases/regress/issue_29983.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29983.dart.legacy.transformed.expect
index 21d9fec..61df937 100644
--- a/pkg/front_end/testcases/regress/issue_29983.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29983.dart.legacy.transformed.expect
@@ -1,4 +1,23 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29983.dart:7:10: Warning: Getter not found: 'missing'.
+//   return missing;
+//          ^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_29983.dart:7:3: Error: 'sync*' and 'async*' can't return a value.
+//   return missing;
+//   ^
+//
+// pkg/front_end/testcases/regress/issue_29983.dart:11:14: Warning: Getter not found: 'dummy'.
+// g() sync* => dummy;
+//              ^^^^^
+//
+// pkg/front_end/testcases/regress/issue_29983.dart:11:14: Error: 'sync*' and 'async*' can't return a value.
+// g() sync* => dummy;
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29983.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29983.dart.strong.expect
index 448582e..0d6e066 100644
--- a/pkg/front_end/testcases/regress/issue_29983.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29983.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29983.dart:7:10: Error: Getter not found: 'missing'.
 //   return missing;
@@ -15,8 +17,7 @@
 // pkg/front_end/testcases/regress/issue_29983.dart:11:14: Error: 'sync*' and 'async*' can't return a value.
 // g() sync* => dummy;
 //              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29983.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29983.dart.strong.transformed.expect
index d3d95c2..fbf6dd3 100644
--- a/pkg/front_end/testcases/regress/issue_29983.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29983.dart.strong.transformed.expect
@@ -1,4 +1,23 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29983.dart:7:10: Error: Getter not found: 'missing'.
+//   return missing;
+//          ^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_29983.dart:7:3: Error: 'sync*' and 'async*' can't return a value.
+//   return missing;
+//   ^
+//
+// pkg/front_end/testcases/regress/issue_29983.dart:11:14: Error: Getter not found: 'dummy'.
+// g() sync* => dummy;
+//              ^^^^^
+//
+// pkg/front_end/testcases/regress/issue_29983.dart:11:14: Error: 'sync*' and 'async*' can't return a value.
+// g() sync* => dummy;
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29984.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29984.dart.legacy.expect
index b8e39cc..bbf49cd 100644
--- a/pkg/front_end/testcases/regress/issue_29984.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29984.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29984.dart:6:16: Warning: Getter not found: 'i'.
 //   for (int i = i;; false) {}
@@ -10,8 +12,7 @@
 // pkg/front_end/testcases/regress/issue_29984.dart:6:16: Context: Previous use of 'i'.
 //   for (int i = i;; false) {}
 //                ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29984.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29984.dart.legacy.transformed.expect
index 8b75d05..bbf49cd 100644
--- a/pkg/front_end/testcases/regress/issue_29984.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29984.dart.legacy.transformed.expect
@@ -1,4 +1,18 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29984.dart:6:16: Warning: Getter not found: 'i'.
+//   for (int i = i;; false) {}
+//                ^
+//
+// pkg/front_end/testcases/regress/issue_29984.dart:6:12: Error: Can't declare 'i' because it was already used in this scope.
+//   for (int i = i;; false) {}
+//            ^
+// pkg/front_end/testcases/regress/issue_29984.dart:6:16: Context: Previous use of 'i'.
+//   for (int i = i;; false) {}
+//                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29984.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29984.dart.strong.expect
index 2b6c35c..d7f4891 100644
--- a/pkg/front_end/testcases/regress/issue_29984.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29984.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29984.dart:6:16: Error: Getter not found: 'i'.
 //   for (int i = i;; false) {}
@@ -10,8 +12,7 @@
 // pkg/front_end/testcases/regress/issue_29984.dart:6:16: Context: Previous use of 'i'.
 //   for (int i = i;; false) {}
 //                ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29984.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29984.dart.strong.transformed.expect
index f86f79b..d7f4891 100644
--- a/pkg/front_end/testcases/regress/issue_29984.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29984.dart.strong.transformed.expect
@@ -1,4 +1,18 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29984.dart:6:16: Error: Getter not found: 'i'.
+//   for (int i = i;; false) {}
+//                ^
+//
+// pkg/front_end/testcases/regress/issue_29984.dart:6:12: Error: Can't declare 'i' because it was already used in this scope.
+//   for (int i = i;; false) {}
+//            ^
+// pkg/front_end/testcases/regress/issue_29984.dart:6:16: Context: Previous use of 'i'.
+//   for (int i = i;; false) {}
+//                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29985.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29985.dart.legacy.expect
index d6e6130..f483f0394 100644
--- a/pkg/front_end/testcases/regress/issue_29985.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29985.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: The non-ASCII character '🔛' (U+1F51B) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -12,19 +14,7 @@
 // pkg/front_end/testcases/regress/issue_29985.dart:6:3: Warning: Getter not found: '🔛'.
 //   🔛
 //   ^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: The non-ASCII character '🔛' (U+1F51B) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-//   🔛
-//   ^
-//
-// pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: Expected ';' after this.
-//   🔛
-//   ^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29985.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29985.dart.legacy.transformed.expect
index 52f90dd..f483f0394 100644
--- a/pkg/front_end/testcases/regress/issue_29985.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29985.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: The non-ASCII character '🔛' (U+1F51B) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -8,8 +10,11 @@
 // pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: Expected ';' after this.
 //   🔛
 //   ^^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_29985.dart:6:3: Warning: Getter not found: '🔛'.
+//   🔛
+//   ^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_29985.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29985.dart.outline.expect
index 355a2a5..69da87f 100644
--- a/pkg/front_end/testcases/regress/issue_29985.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_29985.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: The non-ASCII character '🔛' (U+1F51B) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
 //   🔛
 //   ^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29985.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29985.dart.strong.expect
index f74e906..eff9615 100644
--- a/pkg/front_end/testcases/regress/issue_29985.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29985.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: The non-ASCII character '🔛' (U+1F51B) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -12,19 +14,7 @@
 // pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: Getter not found: '🔛'.
 //   🔛
 //   ^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: The non-ASCII character '🔛' (U+1F51B) can't be used in identifiers, only in strings and comments.
-// Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
-//   🔛
-//   ^
-//
-// pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: Expected ';' after this.
-//   🔛
-//   ^^
-
-library;
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29985.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29985.dart.strong.transformed.expect
index 02cc98e0..eff9615 100644
--- a/pkg/front_end/testcases/regress/issue_29985.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29985.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: The non-ASCII character '🔛' (U+1F51B) can't be used in identifiers, only in strings and comments.
 // Try using an US-ASCII letter, a digit, '_' (an underscore), or '$' (a dollar sign).
@@ -8,8 +10,11 @@
 // pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: Expected ';' after this.
 //   🔛
 //   ^^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_29985.dart:6:3: Error: Getter not found: '🔛'.
+//   🔛
+//   ^^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_29986.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29986.dart.legacy.expect
index 095bbbf..f0b03d5 100644
--- a/pkg/front_end/testcases/regress/issue_29986.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29986.dart.legacy.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29986.dart:8:13: Error: Expected a function body or '=>'.
-// Try adding {}.
-// C(this.name);
-//             ^
-//
-// pkg/front_end/testcases/regress/issue_29986.dart:8:3: Error: Field formal parameters can only be used in a constructor.
-// Try removing 'this.'.
-// C(this.name);
-//   ^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29986.dart:8:13: Error: Expected a function body or '=>'.
-// Try adding {}.
-// C(this.name);
-//             ^
-//
-// pkg/front_end/testcases/regress/issue_29986.dart:8:3: Error: Field formal parameters can only be used in a constructor.
-// Try removing 'this.'.
-// C(this.name);
-//   ^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29986.dart:8:13: Error: Expected a function body or '=>'.
+// Try adding {}.
+// C(this.name);
+//             ^
+//
+// pkg/front_end/testcases/regress/issue_29986.dart:8:3: Error: Field formal parameters can only be used in a constructor.
+// Try removing 'this.'.
+// C(this.name);
+//   ^^^^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29986.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29986.dart.legacy.transformed.expect
index 7c524d5..f0b03d5 100644
--- a/pkg/front_end/testcases/regress/issue_29986.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29986.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29986.dart:8:13: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -9,8 +11,7 @@
 // Try removing 'this.'.
 // C(this.name);
 //   ^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29986.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29986.dart.outline.expect
index 2fe2ce6..6556bc9 100644
--- a/pkg/front_end/testcases/regress/issue_29986.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_29986.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29986.dart:8:13: Error: Expected a function body or '=>'.
 // Try adding {}.
 // C(this.name);
 //             ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29986.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29986.dart.strong.expect
index 095bbbf..f0b03d5 100644
--- a/pkg/front_end/testcases/regress/issue_29986.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29986.dart.strong.expect
@@ -1,28 +1,17 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29986.dart:8:13: Error: Expected a function body or '=>'.
-// Try adding {}.
-// C(this.name);
-//             ^
-//
-// pkg/front_end/testcases/regress/issue_29986.dart:8:3: Error: Field formal parameters can only be used in a constructor.
-// Try removing 'this.'.
-// C(this.name);
-//   ^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29986.dart:8:13: Error: Expected a function body or '=>'.
-// Try adding {}.
-// C(this.name);
-//             ^
-//
-// pkg/front_end/testcases/regress/issue_29986.dart:8:3: Error: Field formal parameters can only be used in a constructor.
-// Try removing 'this.'.
-// C(this.name);
-//   ^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29986.dart:8:13: Error: Expected a function body or '=>'.
+// Try adding {}.
+// C(this.name);
+//             ^
+//
+// pkg/front_end/testcases/regress/issue_29986.dart:8:3: Error: Field formal parameters can only be used in a constructor.
+// Try removing 'this.'.
+// C(this.name);
+//   ^^^^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29986.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29986.dart.strong.transformed.expect
index 7c524d5..f0b03d5 100644
--- a/pkg/front_end/testcases/regress/issue_29986.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29986.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29986.dart:8:13: Error: Expected a function body or '=>'.
 // Try adding {}.
@@ -9,8 +11,7 @@
 // Try removing 'this.'.
 // C(this.name);
 //   ^^^^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29987.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_29987.dart.legacy.expect
index 6273432..84c40be 100644
--- a/pkg/front_end/testcases/regress/issue_29987.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_29987.dart.legacy.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29987.dart:5:13: Error: Couldn't parse URI 'dart_:core':
-//   Illegal scheme character.
-// import "dart_:core";
-//             ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29987.dart:5:13: Error: Couldn't parse URI 'dart_:core':
-//   Illegal scheme character.
-// import "dart_:core";
-//             ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29987.dart:5:13: Error: Couldn't parse URI 'dart_:core':
+//   Illegal scheme character.
+// import "dart_:core";
+//             ^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29987.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_29987.dart.legacy.transformed.expect
index 99b37bf..84c40be 100644
--- a/pkg/front_end/testcases/regress/issue_29987.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29987.dart.legacy.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29987.dart:5:13: Error: Couldn't parse URI 'dart_:core':
 //   Illegal scheme character.
 // import "dart_:core";
 //             ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29987.dart.outline.expect b/pkg/front_end/testcases/regress/issue_29987.dart.outline.expect
index d226574..8b78922 100644
--- a/pkg/front_end/testcases/regress/issue_29987.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_29987.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29987.dart:5:13: Error: Couldn't parse URI 'dart_:core':
 //   Illegal scheme character.
 // import "dart_:core";
 //             ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_29987.dart.strong.expect b/pkg/front_end/testcases/regress/issue_29987.dart.strong.expect
index 6273432..84c40be 100644
--- a/pkg/front_end/testcases/regress/issue_29987.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_29987.dart.strong.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_29987.dart:5:13: Error: Couldn't parse URI 'dart_:core':
-//   Illegal scheme character.
-// import "dart_:core";
-//             ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_29987.dart:5:13: Error: Couldn't parse URI 'dart_:core':
-//   Illegal scheme character.
-// import "dart_:core";
-//             ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_29987.dart:5:13: Error: Couldn't parse URI 'dart_:core':
+//   Illegal scheme character.
+// import "dart_:core";
+//             ^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_29987.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_29987.dart.strong.transformed.expect
index 99b37bf..84c40be 100644
--- a/pkg/front_end/testcases/regress/issue_29987.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_29987.dart.strong.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_29987.dart:5:13: Error: Couldn't parse URI 'dart_:core':
 //   Illegal scheme character.
 // import "dart_:core";
 //             ^
-
-library;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_30834.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_30834.dart.legacy.expect
index f2504e8..d90c580 100644
--- a/pkg/front_end/testcases/regress/issue_30834.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_30834.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_30834.dart:6:7: Error: A class member can't have the same name as the enclosing class.
-//   set A(v) {}
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_30834.dart:6:7: Error: A class member can't have the same name as the enclosing class.
-//   set A(v) {}
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_30834.dart:6:7: Error: A class member can't have the same name as the enclosing class.
+//   set A(v) {}
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30834.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_30834.dart.legacy.transformed.expect
index 6e15af0..d90c580 100644
--- a/pkg/front_end/testcases/regress/issue_30834.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_30834.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30834.dart:6:7: Error: A class member can't have the same name as the enclosing class.
 //   set A(v) {}
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30834.dart.outline.expect b/pkg/front_end/testcases/regress/issue_30834.dart.outline.expect
index 5e79dad..b7a0c48 100644
--- a/pkg/front_end/testcases/regress/issue_30834.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_30834.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30834.dart:6:7: Error: A class member can't have the same name as the enclosing class.
 //   set A(v) {}
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30834.dart.strong.expect b/pkg/front_end/testcases/regress/issue_30834.dart.strong.expect
index 41f5529..5a1e38f 100644
--- a/pkg/front_end/testcases/regress/issue_30834.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_30834.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_30834.dart:6:7: Error: A class member can't have the same name as the enclosing class.
-//   set A(v) {}
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_30834.dart:6:7: Error: A class member can't have the same name as the enclosing class.
-//   set A(v) {}
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_30834.dart:6:7: Error: A class member can't have the same name as the enclosing class.
+//   set A(v) {}
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30834.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_30834.dart.strong.transformed.expect
index ef4ea19..5a1e38f 100644
--- a/pkg/front_end/testcases/regress/issue_30834.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_30834.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30834.dart:6:7: Error: A class member can't have the same name as the enclosing class.
 //   set A(v) {}
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30836.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_30836.dart.legacy.expect
index 57441e0..5d14926 100644
--- a/pkg/front_end/testcases/regress/issue_30836.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_30836.dart.legacy.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_30836.dart:6:13: Error: Final field 'x' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final int x;
-//             ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_30836.dart:6:13: Error: Final field 'x' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final int x;
-//             ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_30836.dart:6:13: Error: Final field 'x' is not initialized.
+// Try to initialize the field in the declaration or in every constructor.
+//   final int x;
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30836.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_30836.dart.legacy.transformed.expect
index 40ac4eb..5d14926 100644
--- a/pkg/front_end/testcases/regress/issue_30836.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_30836.dart.legacy.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30836.dart:6:13: Error: Final field 'x' is not initialized.
 // Try to initialize the field in the declaration or in every constructor.
 //   final int x;
 //             ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30836.dart.strong.expect b/pkg/front_end/testcases/regress/issue_30836.dart.strong.expect
index 57441e0..5d14926 100644
--- a/pkg/front_end/testcases/regress/issue_30836.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_30836.dart.strong.expect
@@ -1,18 +1,12 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_30836.dart:6:13: Error: Final field 'x' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final int x;
-//             ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_30836.dart:6:13: Error: Final field 'x' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final int x;
-//             ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_30836.dart:6:13: Error: Final field 'x' is not initialized.
+// Try to initialize the field in the declaration or in every constructor.
+//   final int x;
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30836.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_30836.dart.strong.transformed.expect
index 40ac4eb..5d14926 100644
--- a/pkg/front_end/testcases/regress/issue_30836.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_30836.dart.strong.transformed.expect
@@ -1,11 +1,12 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30836.dart:6:13: Error: Final field 'x' is not initialized.
 // Try to initialize the field in the declaration or in every constructor.
 //   final int x;
 //             ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30981.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_30981.dart.legacy.expect
index 7bed291..8a1164f 100644
--- a/pkg/front_end/testcases/regress/issue_30981.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_30981.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_30981.dart:6:7: Error: A class member can't have the same name as the enclosing class.
-//   get A {
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_30981.dart:6:7: Error: A class member can't have the same name as the enclosing class.
-//   get A {
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_30981.dart:6:7: Error: A class member can't have the same name as the enclosing class.
+//   get A {
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30981.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_30981.dart.legacy.transformed.expect
index e1e9e01..8a1164f 100644
--- a/pkg/front_end/testcases/regress/issue_30981.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_30981.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30981.dart:6:7: Error: A class member can't have the same name as the enclosing class.
 //   get A {
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30981.dart.outline.expect b/pkg/front_end/testcases/regress/issue_30981.dart.outline.expect
index 67b74d0..e9dde73 100644
--- a/pkg/front_end/testcases/regress/issue_30981.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_30981.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30981.dart:6:7: Error: A class member can't have the same name as the enclosing class.
 //   get A {
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30981.dart.strong.expect b/pkg/front_end/testcases/regress/issue_30981.dart.strong.expect
index 7bed291..8a1164f 100644
--- a/pkg/front_end/testcases/regress/issue_30981.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_30981.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_30981.dart:6:7: Error: A class member can't have the same name as the enclosing class.
-//   get A {
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_30981.dart:6:7: Error: A class member can't have the same name as the enclosing class.
-//   get A {
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_30981.dart:6:7: Error: A class member can't have the same name as the enclosing class.
+//   get A {
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30981.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_30981.dart.strong.transformed.expect
index e1e9e01..8a1164f 100644
--- a/pkg/front_end/testcases/regress/issue_30981.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_30981.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30981.dart:6:7: Error: A class member can't have the same name as the enclosing class.
 //   get A {
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_30994.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_30994.dart.legacy.expect
index ce9d891..fff02be 100644
--- a/pkg/front_end/testcases/regress/issue_30994.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_30994.dart.legacy.expect
@@ -1,64 +1,35 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:6:7: Error: Can't use string interpolation in a URI.
-// part '$foo';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:7:7: Error: Can't use string interpolation in a URI.
-// part '$foo/bar';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:8:7: Error: Can't use string interpolation in a URI.
-// part '$for/bar';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:9:7: Error: Can't use string interpolation in a URI.
-// part '${true}';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:10:10: Error: Can't use string interpolation in a URI.
-// part 'the${1}thing';
-//          ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:11:12: Error: Can't use string interpolation in a URI.
-// part 'part_$foo${'a'}.dart';
-//            ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:12:12: Error: Can't use string interpolation in a URI.
-// part 'part_${'a'}_$foo.dart';
-//            ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:6:7: Error: Can't use string interpolation in a URI.
-// part '$foo';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:7:7: Error: Can't use string interpolation in a URI.
-// part '$foo/bar';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:8:7: Error: Can't use string interpolation in a URI.
-// part '$for/bar';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:9:7: Error: Can't use string interpolation in a URI.
-// part '${true}';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:10:10: Error: Can't use string interpolation in a URI.
-// part 'the${1}thing';
-//          ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:11:12: Error: Can't use string interpolation in a URI.
-// part 'part_$foo${'a'}.dart';
-//            ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:12:12: Error: Can't use string interpolation in a URI.
-// part 'part_${'a'}_$foo.dart';
-//            ^
-
 library lib;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:6:7: Error: Can't use string interpolation in a URI.
+// part '$foo';
+//       ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:7:7: Error: Can't use string interpolation in a URI.
+// part '$foo/bar';
+//       ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:8:7: Error: Can't use string interpolation in a URI.
+// part '$for/bar';
+//       ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:9:7: Error: Can't use string interpolation in a URI.
+// part '${true}';
+//       ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:10:10: Error: Can't use string interpolation in a URI.
+// part 'the${1}thing';
+//          ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:11:12: Error: Can't use string interpolation in a URI.
+// part 'part_$foo${'a'}.dart';
+//            ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:12:12: Error: Can't use string interpolation in a URI.
+// part 'part_${'a'}_$foo.dart';
+//            ^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_30994.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_30994.dart.legacy.transformed.expect
index 9fa56bb..fff02be 100644
--- a/pkg/front_end/testcases/regress/issue_30994.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_30994.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library lib;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30994.dart:6:7: Error: Can't use string interpolation in a URI.
 // part '$foo';
@@ -27,8 +29,7 @@
 // pkg/front_end/testcases/regress/issue_30994.dart:12:12: Error: Can't use string interpolation in a URI.
 // part 'part_${'a'}_$foo.dart';
 //            ^
-
-library lib;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_30994.dart.outline.expect b/pkg/front_end/testcases/regress/issue_30994.dart.outline.expect
index 849db7f..904aabb 100644
--- a/pkg/front_end/testcases/regress/issue_30994.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_30994.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library lib;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30994.dart:6:7: Error: Can't use string interpolation in a URI.
 // part '$foo';
@@ -27,8 +29,7 @@
 // pkg/front_end/testcases/regress/issue_30994.dart:12:12: Error: Can't use string interpolation in a URI.
 // part 'part_${'a'}_$foo.dart';
 //            ^
-
-library lib;
+//
 import self as self;
 
 static method main() → dynamic
diff --git a/pkg/front_end/testcases/regress/issue_30994.dart.strong.expect b/pkg/front_end/testcases/regress/issue_30994.dart.strong.expect
index ce9d891..fff02be 100644
--- a/pkg/front_end/testcases/regress/issue_30994.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_30994.dart.strong.expect
@@ -1,64 +1,35 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:6:7: Error: Can't use string interpolation in a URI.
-// part '$foo';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:7:7: Error: Can't use string interpolation in a URI.
-// part '$foo/bar';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:8:7: Error: Can't use string interpolation in a URI.
-// part '$for/bar';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:9:7: Error: Can't use string interpolation in a URI.
-// part '${true}';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:10:10: Error: Can't use string interpolation in a URI.
-// part 'the${1}thing';
-//          ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:11:12: Error: Can't use string interpolation in a URI.
-// part 'part_$foo${'a'}.dart';
-//            ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:12:12: Error: Can't use string interpolation in a URI.
-// part 'part_${'a'}_$foo.dart';
-//            ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:6:7: Error: Can't use string interpolation in a URI.
-// part '$foo';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:7:7: Error: Can't use string interpolation in a URI.
-// part '$foo/bar';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:8:7: Error: Can't use string interpolation in a URI.
-// part '$for/bar';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:9:7: Error: Can't use string interpolation in a URI.
-// part '${true}';
-//       ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:10:10: Error: Can't use string interpolation in a URI.
-// part 'the${1}thing';
-//          ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:11:12: Error: Can't use string interpolation in a URI.
-// part 'part_$foo${'a'}.dart';
-//            ^
-//
-// pkg/front_end/testcases/regress/issue_30994.dart:12:12: Error: Can't use string interpolation in a URI.
-// part 'part_${'a'}_$foo.dart';
-//            ^
-
 library lib;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:6:7: Error: Can't use string interpolation in a URI.
+// part '$foo';
+//       ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:7:7: Error: Can't use string interpolation in a URI.
+// part '$foo/bar';
+//       ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:8:7: Error: Can't use string interpolation in a URI.
+// part '$for/bar';
+//       ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:9:7: Error: Can't use string interpolation in a URI.
+// part '${true}';
+//       ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:10:10: Error: Can't use string interpolation in a URI.
+// part 'the${1}thing';
+//          ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:11:12: Error: Can't use string interpolation in a URI.
+// part 'part_$foo${'a'}.dart';
+//            ^
+//
+// pkg/front_end/testcases/regress/issue_30994.dart:12:12: Error: Can't use string interpolation in a URI.
+// part 'part_${'a'}_$foo.dart';
+//            ^
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_30994.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_30994.dart.strong.transformed.expect
index 9fa56bb..fff02be 100644
--- a/pkg/front_end/testcases/regress/issue_30994.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_30994.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library lib;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_30994.dart:6:7: Error: Can't use string interpolation in a URI.
 // part '$foo';
@@ -27,8 +29,7 @@
 // pkg/front_end/testcases/regress/issue_30994.dart:12:12: Error: Can't use string interpolation in a URI.
 // part 'part_${'a'}_$foo.dart';
 //            ^
-
-library lib;
+//
 import self as self;
 
 static method main() → dynamic {}
diff --git a/pkg/front_end/testcases/regress/issue_31155.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31155.dart.legacy.expect
index 7168787..8130bfc 100644
--- a/pkg/front_end/testcases/regress/issue_31155.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31155.dart.legacy.expect
@@ -1,52 +1,29 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:18: Error: Expected ';' after this.
-//   var f = Map<A, B> {};
-//                  ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: Operator declarations must be preceeded by the keyword 'operator'.
-// Try adding the keyword 'operator'.
-//   var f = Map<A, B> {};
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-//   var f = Map<A, B> {};
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: Operator '>' should have exactly one parameter.
-//   var f = Map<A, B> {};
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:23: Error: Expected a class member, but got ';'.
-//   var f = Map<A, B> {};
-//                       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:18: Error: Expected ';' after this.
-//   var f = Map<A, B> {};
-//                  ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: Operator declarations must be preceeded by the keyword 'operator'.
-// Try adding the keyword 'operator'.
-//   var f = Map<A, B> {};
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-//   var f = Map<A, B> {};
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: Operator '>' should have exactly one parameter.
-//   var f = Map<A, B> {};
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:23: Error: Expected a class member, but got ';'.
-//   var f = Map<A, B> {};
-//                       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31155.dart:11:18: Error: Expected ';' after this.
+//   var f = Map<A, B> {};
+//                  ^
+//
+// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: Operator declarations must be preceeded by the keyword 'operator'.
+// Try adding the keyword 'operator'.
+//   var f = Map<A, B> {};
+//                   ^
+//
+// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: A method declaration needs an explicit list of parameters.
+// Try adding a parameter list to the method declaration.
+//   var f = Map<A, B> {};
+//                   ^
+//
+// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: Operator '>' should have exactly one parameter.
+//   var f = Map<A, B> {};
+//                   ^
+//
+// pkg/front_end/testcases/regress/issue_31155.dart:11:23: Error: Expected a class member, but got ';'.
+//   var f = Map<A, B> {};
+//                       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31155.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31155.dart.legacy.transformed.expect
index 9265bb3..8130bfc 100644
--- a/pkg/front_end/testcases/regress/issue_31155.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31155.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31155.dart:11:18: Error: Expected ';' after this.
 //   var f = Map<A, B> {};
@@ -21,8 +23,7 @@
 // pkg/front_end/testcases/regress/issue_31155.dart:11:23: Error: Expected a class member, but got ';'.
 //   var f = Map<A, B> {};
 //                       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31155.dart.outline.expect b/pkg/front_end/testcases/regress/issue_31155.dart.outline.expect
index 44a0931..31866e5 100644
--- a/pkg/front_end/testcases/regress/issue_31155.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_31155.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31155.dart:11:18: Error: Expected ';' after this.
 //   var f = Map<A, B> {};
@@ -21,8 +23,7 @@
 // pkg/front_end/testcases/regress/issue_31155.dart:11:23: Error: Expected a class member, but got ';'.
 //   var f = Map<A, B> {};
 //                       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31155.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31155.dart.strong.expect
index 6eb5512..2cfb471 100644
--- a/pkg/front_end/testcases/regress/issue_31155.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31155.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31155.dart:11:18: Error: Expected ';' after this.
 //   var f = Map<A, B> {};
@@ -27,32 +29,7 @@
 // Try correcting the name to the name of an existing method, or defining a method named '<'.
 //   var f = Map<A, B> {};
 //              ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31155.dart:11:18: Error: Expected ';' after this.
-//   var f = Map<A, B> {};
-//                  ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: Operator declarations must be preceeded by the keyword 'operator'.
-// Try adding the keyword 'operator'.
-//   var f = Map<A, B> {};
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-//   var f = Map<A, B> {};
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:19: Error: Operator '>' should have exactly one parameter.
-//   var f = Map<A, B> {};
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31155.dart:11:23: Error: Expected a class member, but got ';'.
-//   var f = Map<A, B> {};
-//                       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31155.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31155.dart.strong.transformed.expect
index acf1ad1..ccabee8 100644
--- a/pkg/front_end/testcases/regress/issue_31155.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31155.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31155.dart:11:18: Error: Expected ';' after this.
 //   var f = Map<A, B> {};
@@ -21,8 +23,13 @@
 // pkg/front_end/testcases/regress/issue_31155.dart:11:23: Error: Expected a class member, but got ';'.
 //   var f = Map<A, B> {};
 //                       ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_31155.dart:11:14: Error: The method '<' isn't defined for the class 'Type'.
+//  - 'Type' is from 'dart:core'.
+// Try correcting the name to the name of an existing method, or defining a method named '<'.
+//   var f = Map<A, B> {};
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31157.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31157.dart.legacy.expect
index 8a84bd6..f102486 100644
--- a/pkg/front_end/testcases/regress/issue_31157.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31157.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31157.dart:6:16: Error: Expected an identifier, but got '('.
 //   return null?.(1);
 //                ^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31157.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31157.dart.legacy.transformed.expect
index 895f75f..f102486 100644
--- a/pkg/front_end/testcases/regress/issue_31157.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31157.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31157.dart:6:16: Error: Expected an identifier, but got '('.
+//   return null?.(1);
+//                ^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31157.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31157.dart.strong.expect
index 8a84bd6..f102486 100644
--- a/pkg/front_end/testcases/regress/issue_31157.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31157.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31157.dart:6:16: Error: Expected an identifier, but got '('.
 //   return null?.(1);
 //                ^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31157.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31157.dart.strong.transformed.expect
index 895f75f..f102486 100644
--- a/pkg/front_end/testcases/regress/issue_31157.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31157.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31157.dart:6:16: Error: Expected an identifier, but got '('.
+//   return null?.(1);
+//                ^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31171.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31171.dart.legacy.expect
index 54e067f..9be6ce1 100644
--- a/pkg/front_end/testcases/regress/issue_31171.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31171.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31171.dart:8:1: Error: Expected a type, but got 'typedef'.
 // typedef F = Map<String, dynamic> Function();
@@ -11,22 +13,7 @@
 // pkg/front_end/testcases/regress/issue_31171.dart:7:11: Error: Can't create typedef from non-function type.
 // typedef T =
 //           ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31171.dart:8:1: Error: Expected a type, but got 'typedef'.
-// typedef F = Map<String, dynamic> Function();
-// ^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_31171.dart:8:1: Error: Expected ';' after this.
-// typedef F = Map<String, dynamic> Function();
-// ^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_31171.dart:7:11: Error: Can't create typedef from non-function type.
-// typedef T = 
-//           ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31171.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31171.dart.legacy.transformed.expect
index ad9b787..9be6ce1 100644
--- a/pkg/front_end/testcases/regress/issue_31171.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31171.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31171.dart:8:1: Error: Expected a type, but got 'typedef'.
 // typedef F = Map<String, dynamic> Function();
@@ -9,10 +11,9 @@
 // ^^^^^^^
 //
 // pkg/front_end/testcases/regress/issue_31171.dart:7:11: Error: Can't create typedef from non-function type.
-// typedef T = 
+// typedef T =
 //           ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31171.dart.outline.expect b/pkg/front_end/testcases/regress/issue_31171.dart.outline.expect
index 772c92d..796d473 100644
--- a/pkg/front_end/testcases/regress/issue_31171.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_31171.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31171.dart:8:1: Error: Expected a type, but got 'typedef'.
 // typedef F = Map<String, dynamic> Function();
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/regress/issue_31171.dart:7:11: Error: Can't create typedef from non-function type.
 // typedef T =
 //           ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31171.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31171.dart.strong.expect
index 54e067f..9be6ce1 100644
--- a/pkg/front_end/testcases/regress/issue_31171.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31171.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31171.dart:8:1: Error: Expected a type, but got 'typedef'.
 // typedef F = Map<String, dynamic> Function();
@@ -11,22 +13,7 @@
 // pkg/front_end/testcases/regress/issue_31171.dart:7:11: Error: Can't create typedef from non-function type.
 // typedef T =
 //           ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31171.dart:8:1: Error: Expected a type, but got 'typedef'.
-// typedef F = Map<String, dynamic> Function();
-// ^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_31171.dart:8:1: Error: Expected ';' after this.
-// typedef F = Map<String, dynamic> Function();
-// ^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_31171.dart:7:11: Error: Can't create typedef from non-function type.
-// typedef T = 
-//           ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31171.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31171.dart.strong.transformed.expect
index ad9b787..9be6ce1 100644
--- a/pkg/front_end/testcases/regress/issue_31171.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31171.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31171.dart:8:1: Error: Expected a type, but got 'typedef'.
 // typedef F = Map<String, dynamic> Function();
@@ -9,10 +11,9 @@
 // ^^^^^^^
 //
 // pkg/front_end/testcases/regress/issue_31171.dart:7:11: Error: Can't create typedef from non-function type.
-// typedef T = 
+// typedef T =
 //           ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31180.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31180.dart.legacy.expect
index 1223575..b503b42 100644
--- a/pkg/front_end/testcases/regress/issue_31180.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31180.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31180.dart:6:16: Error: Expected an identifier, but got '['.
 //   return null?.[1];
 //                ^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31180.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31180.dart.legacy.transformed.expect
index 624821f2..b503b42 100644
--- a/pkg/front_end/testcases/regress/issue_31180.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31180.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31180.dart:6:16: Error: Expected an identifier, but got '['.
+//   return null?.[1];
+//                ^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31180.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31180.dart.strong.expect
index 1223575..b503b42 100644
--- a/pkg/front_end/testcases/regress/issue_31180.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31180.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31180.dart:6:16: Error: Expected an identifier, but got '['.
 //   return null?.[1];
 //                ^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31180.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31180.dart.strong.transformed.expect
index 624821f2..b503b42 100644
--- a/pkg/front_end/testcases/regress/issue_31180.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31180.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31180.dart:6:16: Error: Expected an identifier, but got '['.
+//   return null?.[1];
+//                ^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31183.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31183.dart.legacy.expect
index cf6950e..aac5171 100644
--- a/pkg/front_end/testcases/regress/issue_31183.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31183.dart.legacy.expect
@@ -1,26 +1,16 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
-//   operator unary- => 0;
-//            ^^^^^
-//
-// pkg/front_end/testcases/regress/issue_31183.dart:6:17: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-//   operator unary- => 0;
-//                 ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
-//   operator unary- => 0;
-//            ^^^^^
-//
-// pkg/front_end/testcases/regress/issue_31183.dart:6:17: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-//   operator unary- => 0;
-//                 ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
+//   operator unary- => 0;
+//            ^^^^^
+//
+// pkg/front_end/testcases/regress/issue_31183.dart:6:17: Error: A method declaration needs an explicit list of parameters.
+// Try adding a parameter list to the method declaration.
+//   operator unary- => 0;
+//                 ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31183.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31183.dart.legacy.transformed.expect
index a0f201d..aac5171 100644
--- a/pkg/front_end/testcases/regress/issue_31183.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31183.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
 //   operator unary- => 0;
@@ -8,8 +10,7 @@
 // Try adding a parameter list to the method declaration.
 //   operator unary- => 0;
 //                 ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31183.dart.outline.expect b/pkg/front_end/testcases/regress/issue_31183.dart.outline.expect
index 5635a433..5b125a0 100644
--- a/pkg/front_end/testcases/regress/issue_31183.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_31183.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
 //   operator unary- => 0;
@@ -8,8 +10,7 @@
 // Try adding a parameter list to the method declaration.
 //   operator unary- => 0;
 //                 ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31183.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31183.dart.strong.expect
index cf6950e..aac5171 100644
--- a/pkg/front_end/testcases/regress/issue_31183.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31183.dart.strong.expect
@@ -1,26 +1,16 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
-//   operator unary- => 0;
-//            ^^^^^
-//
-// pkg/front_end/testcases/regress/issue_31183.dart:6:17: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-//   operator unary- => 0;
-//                 ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
-//   operator unary- => 0;
-//            ^^^^^
-//
-// pkg/front_end/testcases/regress/issue_31183.dart:6:17: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-//   operator unary- => 0;
-//                 ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
+//   operator unary- => 0;
+//            ^^^^^
+//
+// pkg/front_end/testcases/regress/issue_31183.dart:6:17: Error: A method declaration needs an explicit list of parameters.
+// Try adding a parameter list to the method declaration.
+//   operator unary- => 0;
+//                 ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31183.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31183.dart.strong.transformed.expect
index a0f201d..aac5171 100644
--- a/pkg/front_end/testcases/regress/issue_31183.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31183.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31183.dart:6:12: Error: Unexpected token 'unary'.
 //   operator unary- => 0;
@@ -8,8 +10,7 @@
 // Try adding a parameter list to the method declaration.
 //   operator unary- => 0;
 //                 ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31184.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31184.dart.legacy.expect
index e6ca181..6b6b0e4 100644
--- a/pkg/front_end/testcases/regress/issue_31184.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31184.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31184.dart:6:19: Error: 'i' is already declared in this scope.
 //   for (int i = 0, i > 10; i++) {}
@@ -14,18 +16,7 @@
 // pkg/front_end/testcases/regress/issue_31184.dart:6:21: Error: Expected an identifier, but got '>'.
 //   for (int i = 0, i > 10; i++) {}
 //                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31184.dart:6:19: Error: Expected ';' after this.
-//   for (int i = 0, i > 10; i++) {}
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31184.dart:6:21: Error: Expected an identifier, but got '>'.
-//   for (int i = 0, i > 10; i++) {}
-//                     ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31184.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31184.dart.legacy.transformed.expect
index b02bd88..6b6b0e4 100644
--- a/pkg/front_end/testcases/regress/issue_31184.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31184.dart.legacy.transformed.expect
@@ -1,4 +1,13 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31184.dart:6:19: Error: 'i' is already declared in this scope.
+//   for (int i = 0, i > 10; i++) {}
+//                   ^
+// pkg/front_end/testcases/regress/issue_31184.dart:6:12: Context: Previous declaration of 'i'.
+//   for (int i = 0, i > 10; i++) {}
+//            ^
 //
 // pkg/front_end/testcases/regress/issue_31184.dart:6:19: Error: Expected ';' after this.
 //   for (int i = 0, i > 10; i++) {}
@@ -7,8 +16,7 @@
 // pkg/front_end/testcases/regress/issue_31184.dart:6:21: Error: Expected an identifier, but got '>'.
 //   for (int i = 0, i > 10; i++) {}
 //                     ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31184.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31184.dart.strong.expect
index 310a49e..a3c59b2 100644
--- a/pkg/front_end/testcases/regress/issue_31184.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31184.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31184.dart:6:19: Error: 'i' is already declared in this scope.
 //   for (int i = 0, i > 10; i++) {}
@@ -14,18 +16,7 @@
 // pkg/front_end/testcases/regress/issue_31184.dart:6:21: Error: Expected an identifier, but got '>'.
 //   for (int i = 0, i > 10; i++) {}
 //                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31184.dart:6:19: Error: Expected ';' after this.
-//   for (int i = 0, i > 10; i++) {}
-//                   ^
-//
-// pkg/front_end/testcases/regress/issue_31184.dart:6:21: Error: Expected an identifier, but got '>'.
-//   for (int i = 0, i > 10; i++) {}
-//                     ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31184.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31184.dart.strong.transformed.expect
index 8de07cd..a3c59b2 100644
--- a/pkg/front_end/testcases/regress/issue_31184.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31184.dart.strong.transformed.expect
@@ -1,4 +1,13 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31184.dart:6:19: Error: 'i' is already declared in this scope.
+//   for (int i = 0, i > 10; i++) {}
+//                   ^
+// pkg/front_end/testcases/regress/issue_31184.dart:6:12: Context: Previous declaration of 'i'.
+//   for (int i = 0, i > 10; i++) {}
+//            ^
 //
 // pkg/front_end/testcases/regress/issue_31184.dart:6:19: Error: Expected ';' after this.
 //   for (int i = 0, i > 10; i++) {}
@@ -7,8 +16,7 @@
 // pkg/front_end/testcases/regress/issue_31184.dart:6:21: Error: Expected an identifier, but got '>'.
 //   for (int i = 0, i > 10; i++) {}
 //                     ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31185.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31185.dart.legacy.expect
index bc5ace6..53b6c90 100644
--- a/pkg/front_end/testcases/regress/issue_31185.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31185.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31185.dart:8:12: Error: Expected ';' after this.
 //   return i ++ (i);
@@ -11,18 +13,7 @@
 // pkg/front_end/testcases/regress/issue_31185.dart:12:12: Error: Can't assign to a parenthesized expression.
 //   return (i) ++ (i);
 //            ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31185.dart:8:12: Error: Expected ';' after this.
-//   return i ++ (i);
-//            ^^
-//
-// pkg/front_end/testcases/regress/issue_31185.dart:12:14: Error: Expected ';' after this.
-//   return (i) ++ (i);
-//              ^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31185.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31185.dart.legacy.transformed.expect
index 4494677..53b6c90 100644
--- a/pkg/front_end/testcases/regress/issue_31185.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31185.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31185.dart:8:12: Error: Expected ';' after this.
 //   return i ++ (i);
@@ -7,8 +9,11 @@
 // pkg/front_end/testcases/regress/issue_31185.dart:12:14: Error: Expected ';' after this.
 //   return (i) ++ (i);
 //              ^^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_31185.dart:12:12: Error: Can't assign to a parenthesized expression.
+//   return (i) ++ (i);
+//            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31185.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31185.dart.strong.expect
index 3255194..f399b3a 100644
--- a/pkg/front_end/testcases/regress/issue_31185.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31185.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31185.dart:8:12: Error: Expected ';' after this.
 //   return i ++ (i);
@@ -11,18 +13,7 @@
 // pkg/front_end/testcases/regress/issue_31185.dart:12:12: Error: Can't assign to a parenthesized expression.
 //   return (i) ++ (i);
 //            ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31185.dart:8:12: Error: Expected ';' after this.
-//   return i ++ (i);
-//            ^^
-//
-// pkg/front_end/testcases/regress/issue_31185.dart:12:14: Error: Expected ';' after this.
-//   return (i) ++ (i);
-//              ^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31185.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31185.dart.strong.transformed.expect
index 9b0d784..d1b5634 100644
--- a/pkg/front_end/testcases/regress/issue_31185.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31185.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31185.dart:8:12: Error: Expected ';' after this.
 //   return i ++ (i);
@@ -7,8 +9,11 @@
 // pkg/front_end/testcases/regress/issue_31185.dart:12:14: Error: Expected ';' after this.
 //   return (i) ++ (i);
 //              ^^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_31185.dart:12:12: Error: Can't assign to a parenthesized expression.
+//   return (i) ++ (i);
+//            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31186.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31186.dart.legacy.expect
index 79db460..8f46e0f 100644
--- a/pkg/front_end/testcases/regress/issue_31186.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31186.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31186.dart:6:16: Error: Expected an identifier, but got 'true'.
 //   return null?.true;
 //                ^^^^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31186.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31186.dart.legacy.transformed.expect
index db52098..8f46e0f 100644
--- a/pkg/front_end/testcases/regress/issue_31186.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31186.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31186.dart:6:16: Error: Expected an identifier, but got 'true'.
+//   return null?.true;
+//                ^^^^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31186.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31186.dart.strong.expect
index 79db460..8f46e0f 100644
--- a/pkg/front_end/testcases/regress/issue_31186.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31186.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31186.dart:6:16: Error: Expected an identifier, but got 'true'.
 //   return null?.true;
 //                ^^^^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31186.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31186.dart.strong.transformed.expect
index db52098..8f46e0f 100644
--- a/pkg/front_end/testcases/regress/issue_31186.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31186.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31186.dart:6:16: Error: Expected an identifier, but got 'true'.
+//   return null?.true;
+//                ^^^^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31187.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31187.dart.legacy.expect
index 4b86241..6126225 100644
--- a/pkg/front_end/testcases/regress/issue_31187.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31187.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31187.dart:6:16: Error: Expected an identifier, but got '1'.
 //   return null?.1;
 //                ^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31187.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31187.dart.legacy.transformed.expect
index df2ebb4..6126225 100644
--- a/pkg/front_end/testcases/regress/issue_31187.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31187.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31187.dart:6:16: Error: Expected an identifier, but got '1'.
+//   return null?.1;
+//                ^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31187.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31187.dart.strong.expect
index 4b86241..6126225 100644
--- a/pkg/front_end/testcases/regress/issue_31187.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31187.dart.strong.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31187.dart:6:16: Error: Expected an identifier, but got '1'.
 //   return null?.1;
 //                ^
-
-library;
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31187.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31187.dart.strong.transformed.expect
index df2ebb4..6126225 100644
--- a/pkg/front_end/testcases/regress/issue_31187.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31187.dart.strong.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31187.dart:6:16: Error: Expected an identifier, but got '1'.
+//   return null?.1;
+//                ^
+//
 import self as self;
 
 static method bad() → dynamic {
diff --git a/pkg/front_end/testcases/regress/issue_31188.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31188.dart.legacy.expect
index b43e742..ee42a18 100644
--- a/pkg/front_end/testcases/regress/issue_31188.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31188.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31188.dart:7:17: Error: Expected ';' after this.
 // type T = Map<A, B>
@@ -19,18 +21,7 @@
 // pkg/front_end/testcases/regress/issue_31188.dart:7:1: Warning: 'type' isn't a type.
 // type T = Map<A, B>
 // ^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31188.dart:7:17: Error: Expected ';' after this.
-// type T = Map<A, B>
-//                 ^
-//
-// pkg/front_end/testcases/regress/issue_31188.dart:7:18: Error: Expected a declaration, but got '>'.
-// type T = Map<A, B>
-//                  ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31188.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31188.dart.legacy.transformed.expect
index 17bbd41..ee42a18 100644
--- a/pkg/front_end/testcases/regress/issue_31188.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31188.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31188.dart:7:17: Error: Expected ';' after this.
 // type T = Map<A, B>
@@ -7,8 +9,19 @@
 // pkg/front_end/testcases/regress/issue_31188.dart:7:18: Error: Expected a declaration, but got '>'.
 // type T = Map<A, B>
 //                  ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_31188.dart:7:1: Warning: Type 'type' not found.
+// type T = Map<A, B>
+// ^^^^
+//
+// pkg/front_end/testcases/regress/issue_31188.dart:7:14: Warning: Getter not found: 'A'.
+// type T = Map<A, B>
+//              ^
+//
+// pkg/front_end/testcases/regress/issue_31188.dart:7:1: Warning: 'type' isn't a type.
+// type T = Map<A, B>
+// ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31188.dart.outline.expect b/pkg/front_end/testcases/regress/issue_31188.dart.outline.expect
index 8808453..c60e8a0 100644
--- a/pkg/front_end/testcases/regress/issue_31188.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_31188.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31188.dart:7:17: Error: Expected ';' after this.
 // type T = Map<A, B>
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/regress/issue_31188.dart:7:1: Warning: Type 'type' not found.
 // type T = Map<A, B>
 // ^^^^
-
-library;
+//
 import self as self;
 
 static field invalid-type T;
diff --git a/pkg/front_end/testcases/regress/issue_31188.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31188.dart.strong.expect
index 166f5be..4a0c403 100644
--- a/pkg/front_end/testcases/regress/issue_31188.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31188.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31188.dart:7:17: Error: Expected ';' after this.
 // type T = Map<A, B>
@@ -25,26 +27,7 @@
 // pkg/front_end/testcases/regress/issue_31188.dart:7:1: Error: 'type' isn't a type.
 // type T = Map<A, B>
 // ^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31188.dart:7:17: Error: Expected ';' after this.
-// type T = Map<A, B>
-//                 ^
-//
-// pkg/front_end/testcases/regress/issue_31188.dart:7:18: Error: Expected a declaration, but got '>'.
-// type T = Map<A, B>
-//                  ^
-//
-// pkg/front_end/testcases/regress/issue_31188.dart:7:1: Error: Type 'type' not found.
-// type T = Map<A, B>
-// ^^^^
-//
-// pkg/front_end/testcases/regress/issue_31188.dart:7:1: Error: 'type' isn't a type.
-// type T = Map<A, B>
-// ^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31188.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31188.dart.strong.transformed.expect
index 780a726..1605b31 100644
--- a/pkg/front_end/testcases/regress/issue_31188.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31188.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31188.dart:7:17: Error: Expected ';' after this.
 // type T = Map<A, B>
@@ -12,11 +14,20 @@
 // type T = Map<A, B>
 // ^^^^
 //
+// pkg/front_end/testcases/regress/issue_31188.dart:7:14: Error: Getter not found: 'A'.
+// type T = Map<A, B>
+//              ^
+//
+// pkg/front_end/testcases/regress/issue_31188.dart:7:13: Error: The method '<' isn't defined for the class 'Type'.
+//  - 'Type' is from 'dart:core'.
+// Try correcting the name to the name of an existing method, or defining a method named '<'.
+// type T = Map<A, B>
+//             ^
+//
 // pkg/front_end/testcases/regress/issue_31188.dart:7:1: Error: 'type' isn't a type.
 // type T = Map<A, B>
 // ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31190.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31190.dart.legacy.expect
index e46d9d8..22dd31b 100644
--- a/pkg/front_end/testcases/regress/issue_31190.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31190.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31190.dart:6:3: Warning: Can't use type arguments with type variable 'T'.
 // Try removing the type arguments.
@@ -12,8 +14,7 @@
 // pkg/front_end/testcases/regress/issue_31190.dart:6:3: Warning: Expected 0 type arguments.
 //   T<U> v;
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31190.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31190.dart.legacy.transformed.expect
index ae55cb3..22dd31b 100644
--- a/pkg/front_end/testcases/regress/issue_31190.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31190.dart.legacy.transformed.expect
@@ -1,4 +1,20 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31190.dart:6:3: Warning: Can't use type arguments with type variable 'T'.
+// Try removing the type arguments.
+//   T<U> v;
+//   ^
+//
+// pkg/front_end/testcases/regress/issue_31190.dart:6:5: Warning: 'U' isn't a type.
+//   T<U> v;
+//     ^
+//
+// pkg/front_end/testcases/regress/issue_31190.dart:6:3: Warning: Expected 0 type arguments.
+//   T<U> v;
+//   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31190.dart.outline.expect b/pkg/front_end/testcases/regress/issue_31190.dart.outline.expect
index b8af511..1d72ade 100644
--- a/pkg/front_end/testcases/regress/issue_31190.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_31190.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31190.dart:6:3: Warning: Can't use type arguments with type variable 'T'.
 // Try removing the type arguments.
 //   T<U> v;
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31190.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31190.dart.strong.expect
index 76b114c..20196d3 100644
--- a/pkg/front_end/testcases/regress/issue_31190.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31190.dart.strong.expect
@@ -1,34 +1,20 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_31190.dart:6:3: Error: Can't use type arguments with type variable 'T'.
-// Try removing the type arguments.
-//   T<U> v;
-//   ^
-//
-// pkg/front_end/testcases/regress/issue_31190.dart:6:5: Error: 'U' isn't a type.
-//   T<U> v;
-//     ^
-//
-// pkg/front_end/testcases/regress/issue_31190.dart:6:3: Error: Expected 0 type arguments.
-//   T<U> v;
-//   ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_31190.dart:6:3: Error: Can't use type arguments with type variable 'T'.
-// Try removing the type arguments.
-//   T<U> v;
-//   ^
-//
-// pkg/front_end/testcases/regress/issue_31190.dart:6:5: Error: 'U' isn't a type.
-//   T<U> v;
-//     ^
-//
-// pkg/front_end/testcases/regress/issue_31190.dart:6:3: Error: Expected 0 type arguments.
-//   T<U> v;
-//   ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31190.dart:6:3: Error: Can't use type arguments with type variable 'T'.
+// Try removing the type arguments.
+//   T<U> v;
+//   ^
+//
+// pkg/front_end/testcases/regress/issue_31190.dart:6:5: Error: 'U' isn't a type.
+//   T<U> v;
+//     ^
+//
+// pkg/front_end/testcases/regress/issue_31190.dart:6:3: Error: Expected 0 type arguments.
+//   T<U> v;
+//   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31190.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31190.dart.strong.transformed.expect
index 8965f65..20196d3 100644
--- a/pkg/front_end/testcases/regress/issue_31190.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31190.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31190.dart:6:3: Error: Can't use type arguments with type variable 'T'.
 // Try removing the type arguments.
@@ -12,8 +14,7 @@
 // pkg/front_end/testcases/regress/issue_31190.dart:6:3: Error: Expected 0 type arguments.
 //   T<U> v;
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31192.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31192.dart.legacy.expect
index be20748..5e16fda 100644
--- a/pkg/front_end/testcases/regress/issue_31192.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31192.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
@@ -8,15 +10,7 @@
 // pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Can't access 'this' in a field initializer to read 'x'.
 //   Increment() : x++ {}
 //                 ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Expected an assignment after the field name.
-// To initialize a field, use the syntax 'name = value'.
-//   Increment() : x++ {}
-//                 ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31192.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31192.dart.legacy.transformed.expect
index 66b40c3..5e16fda 100644
--- a/pkg/front_end/testcases/regress/issue_31192.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31192.dart.legacy.transformed.expect
@@ -1,11 +1,16 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
 //   Increment() : x++ {}
 //                 ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Can't access 'this' in a field initializer to read 'x'.
+//   Increment() : x++ {}
+//                 ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31192.dart.outline.expect b/pkg/front_end/testcases/regress/issue_31192.dart.outline.expect
index b416833..42415db 100644
--- a/pkg/front_end/testcases/regress/issue_31192.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_31192.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
 //   Increment() : x++ {}
 //                 ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31192.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31192.dart.strong.expect
index be20748..5e16fda 100644
--- a/pkg/front_end/testcases/regress/issue_31192.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31192.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
@@ -8,15 +10,7 @@
 // pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Can't access 'this' in a field initializer to read 'x'.
 //   Increment() : x++ {}
 //                 ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Expected an assignment after the field name.
-// To initialize a field, use the syntax 'name = value'.
-//   Increment() : x++ {}
-//                 ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31192.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31192.dart.strong.transformed.expect
index 66b40c3..5e16fda 100644
--- a/pkg/front_end/testcases/regress/issue_31192.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31192.dart.strong.transformed.expect
@@ -1,11 +1,16 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Expected an assignment after the field name.
 // To initialize a field, use the syntax 'name = value'.
 //   Increment() : x++ {}
 //                 ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_31192.dart:7:17: Error: Can't access 'this' in a field initializer to read 'x'.
+//   Increment() : x++ {}
+//                 ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31198.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31198.dart.legacy.expect
index 3cf0eb0..895d3bb 100644
--- a/pkg/front_end/testcases/regress/issue_31198.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31198.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31198.dart:8:8: Error: Can't use 'super' as an expression.
 // To delegate a constructor to a super constructor, put the super call as an initializer.
@@ -8,8 +10,7 @@
 // pkg/front_end/testcases/regress/issue_31198.dart:8:16: Error: Expected an initializer.
 //   B(): super().foo() {}
 //                ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31198.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31198.dart.legacy.transformed.expect
index 807896b..895d3bb 100644
--- a/pkg/front_end/testcases/regress/issue_31198.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31198.dart.legacy.transformed.expect
@@ -1,4 +1,16 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31198.dart:8:8: Error: Can't use 'super' as an expression.
+// To delegate a constructor to a super constructor, put the super call as an initializer.
+//   B(): super().foo() {}
+//        ^
+//
+// pkg/front_end/testcases/regress/issue_31198.dart:8:16: Error: Expected an initializer.
+//   B(): super().foo() {}
+//                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31198.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31198.dart.strong.expect
index 3cf0eb0..895d3bb 100644
--- a/pkg/front_end/testcases/regress/issue_31198.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31198.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31198.dart:8:8: Error: Can't use 'super' as an expression.
 // To delegate a constructor to a super constructor, put the super call as an initializer.
@@ -8,8 +10,7 @@
 // pkg/front_end/testcases/regress/issue_31198.dart:8:16: Error: Expected an initializer.
 //   B(): super().foo() {}
 //                ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31198.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_31198.dart.strong.transformed.expect
index 807896b..895d3bb 100644
--- a/pkg/front_end/testcases/regress/issue_31198.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31198.dart.strong.transformed.expect
@@ -1,4 +1,16 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31198.dart:8:8: Error: Can't use 'super' as an expression.
+// To delegate a constructor to a super constructor, put the super call as an initializer.
+//   B(): super().foo() {}
+//        ^
+//
+// pkg/front_end/testcases/regress/issue_31198.dart:8:16: Error: Expected an initializer.
+//   B(): super().foo() {}
+//                ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31299.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_31299.dart.legacy.expect
index f670776..00cb07e 100644
--- a/pkg/front_end/testcases/regress/issue_31299.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_31299.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31299.dart:18:12: Warning: Too many positional arguments: 0 allowed, but 2 found.
 // Try removing the extra positional arguments.
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/regress/issue_31299.dart:10:3: Context: Found this candidate, but the arguments don't match.
 //   A.foo() : m = 2;
 //   ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31299.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_31299.dart.legacy.transformed.expect
index 8f696fe..00cb07e 100644
--- a/pkg/front_end/testcases/regress/issue_31299.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31299.dart.legacy.transformed.expect
@@ -1,4 +1,15 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_31299.dart:18:12: Warning: Too many positional arguments: 0 allowed, but 2 found.
+// Try removing the extra positional arguments.
+//   new A.foo(1, 2);
+//            ^
+// pkg/front_end/testcases/regress/issue_31299.dart:10:3: Context: Found this candidate, but the arguments don't match.
+//   A.foo() : m = 2;
+//   ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_31299.dart.strong.expect b/pkg/front_end/testcases/regress/issue_31299.dart.strong.expect
index 3d0577f..f42f82a 100644
--- a/pkg/front_end/testcases/regress/issue_31299.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_31299.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_31299.dart:18:12: Error: Too many positional arguments: 0 allowed, but 2 found.
 // Try removing the extra positional arguments.
@@ -11,14 +13,7 @@
 // pkg/front_end/testcases/regress/issue_31299.dart:15:14: Error: Too few positional arguments: 2 required, 0 given.
 //   new A().foo();
 //              ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_31299.dart:15:14: Error: Too few positional arguments: 2 required, 0 given.
-//   new A().foo();
-//              ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32200.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_32200.dart.legacy.expect
index d4f6b1b..287c06f 100644
--- a/pkg/front_end/testcases/regress/issue_32200.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_32200.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_32200.dart:8:3: Warning: 'self.Foo' can't be used as a type because 'self' doesn't refer to an import prefix.
 //   self.Foo self;
 //   ^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32200.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_32200.dart.legacy.transformed.expect
index 6e1ee25..287c06f 100644
--- a/pkg/front_end/testcases/regress/issue_32200.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_32200.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_32200.dart:8:3: Warning: 'self.Foo' can't be used as a type because 'self' doesn't refer to an import prefix.
+//   self.Foo self;
+//   ^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32200.dart.outline.expect b/pkg/front_end/testcases/regress/issue_32200.dart.outline.expect
index 90c080c..8a57a9f 100644
--- a/pkg/front_end/testcases/regress/issue_32200.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_32200.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_32200.dart:8:3: Warning: 'self.Foo' can't be used as a type because 'self' doesn't refer to an import prefix.
 //   self.Foo self;
 //   ^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32200.dart.strong.expect b/pkg/front_end/testcases/regress/issue_32200.dart.strong.expect
index 3eaa5d1..cd875cb 100644
--- a/pkg/front_end/testcases/regress/issue_32200.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_32200.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_32200.dart:8:3: Error: 'self.Foo' can't be used as a type because 'self' doesn't refer to an import prefix.
 //   self.Foo self;
@@ -9,14 +11,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'invalid-type'.
 //   instance.self = instance;
 //                   ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_32200.dart:8:3: Error: 'self.Foo' can't be used as a type because 'self' doesn't refer to an import prefix.
-//   self.Foo self;
-//   ^^^^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32200.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_32200.dart.strong.transformed.expect
index 7e77e11..cd875cb 100644
--- a/pkg/front_end/testcases/regress/issue_32200.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_32200.dart.strong.transformed.expect
@@ -1,10 +1,17 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_32200.dart:8:3: Error: 'self.Foo' can't be used as a type because 'self' doesn't refer to an import prefix.
 //   self.Foo self;
 //   ^^^^^^^^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_32200.dart:13:19: Error: A value of type 'Foo' can't be assigned to a variable of type 'invalid-type'.
+//  - 'Foo' is from 'pkg/front_end/testcases/regress/issue_32200.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'invalid-type'.
+//   instance.self = instance;
+//                   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32660.dart.strong.expect b/pkg/front_end/testcases/regress/issue_32660.dart.strong.expect
index 4848bf0..910fc65 100644
--- a/pkg/front_end/testcases/regress/issue_32660.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_32660.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_32660.dart:6:3: Error: The method 'A.foo' has fewer named arguments than those of overridden method 'B.foo'.
 //   foo(int x) => x;
@@ -19,18 +21,7 @@
 // pkg/front_end/testcases/regress/issue_32660.dart:24:7: Context: Both members are inherited by the non-abstract class 'E'.
 // class E extends D {
 //       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_32660.dart:6:3: Error: The method 'A.foo' has fewer named arguments than those of overridden method 'B.foo'.
-//   foo(int x) => x;
-//   ^
-//
-// pkg/front_end/testcases/regress/issue_32660.dart:21:3: Error: The method 'D.foo' has fewer named arguments than those of overridden method 'E.foo'.
-//   foo(int x) => x;
-//   ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32660.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_32660.dart.strong.transformed.expect
index 86d1097..910fc65 100644
--- a/pkg/front_end/testcases/regress/issue_32660.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_32660.dart.strong.transformed.expect
@@ -1,14 +1,27 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_32660.dart:6:3: Error: The method 'A.foo' has fewer named arguments than those of overridden method 'B.foo'.
 //   foo(int x) => x;
 //   ^
+// pkg/front_end/testcases/regress/issue_32660.dart:10:3: Context: This is the overridden method ('foo').
+//   foo(int x, {int y}) => y;
+//   ^
+// pkg/front_end/testcases/regress/issue_32660.dart:13:7: Context: Both members are inherited by the non-abstract class 'C'.
+// class C extends A implements B {
+//       ^
 //
 // pkg/front_end/testcases/regress/issue_32660.dart:21:3: Error: The method 'D.foo' has fewer named arguments than those of overridden method 'E.foo'.
 //   foo(int x) => x;
 //   ^
-
-library;
+// pkg/front_end/testcases/regress/issue_32660.dart:25:3: Context: This is the overridden method ('foo').
+//   foo(int x, {int y});
+//   ^
+// pkg/front_end/testcases/regress/issue_32660.dart:24:7: Context: Both members are inherited by the non-abstract class 'E'.
+// class E extends D {
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32972.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_32972.dart.legacy.expect
index eef01df..d112e29 100644
--- a/pkg/front_end/testcases/regress/issue_32972.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_32972.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_32972.dart:22:3: Warning: Expected 1 type arguments.
 //   foo<String, String>("hello world");
@@ -20,8 +22,7 @@
 // pkg/front_end/testcases/regress/issue_32972.dart:19:7: Context: The class 'Bar' has a constructor that takes no arguments.
 // class Bar<X, Y> {}
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32972.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_32972.dart.legacy.transformed.expect
index 5f60828..d112e29 100644
--- a/pkg/front_end/testcases/regress/issue_32972.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_32972.dart.legacy.transformed.expect
@@ -1,4 +1,28 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_32972.dart:22:3: Warning: Expected 1 type arguments.
+//   foo<String, String>("hello world");
+//   ^
+// pkg/front_end/testcases/regress/issue_32972.dart:5:6: Context: Found this candidate, but the arguments don't match.
+// void foo<X>(X i) {
+//      ^^^
+//
+// pkg/front_end/testcases/regress/issue_32972.dart:24:7: Warning: Expected 1 type arguments.
+//   Foo.foo<int, int>(42);
+//       ^
+// pkg/front_end/testcases/regress/issue_32972.dart:10:10: Context: Found this candidate, but the arguments don't match.
+//   static foo<X>(X i) {
+//          ^^^
+//
+// pkg/front_end/testcases/regress/issue_32972.dart:29:7: Warning: Expected 2 type arguments.
+//   new Bar<String>();
+//       ^
+// pkg/front_end/testcases/regress/issue_32972.dart:19:7: Context: The class 'Bar' has a constructor that takes no arguments.
+// class Bar<X, Y> {}
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_32972.dart.strong.expect b/pkg/front_end/testcases/regress/issue_32972.dart.strong.expect
index d6a1208..28ddd81 100644
--- a/pkg/front_end/testcases/regress/issue_32972.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_32972.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_32972.dart:22:3: Error: Expected 1 type arguments.
 //   foo<String, String>("hello world");
@@ -24,14 +26,7 @@
 // pkg/front_end/testcases/regress/issue_32972.dart:27:5: Error: Expected 1 type arguments.
 //   f.bar<double, double>(42.42);
 //     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_32972.dart:27:5: Error: Expected 1 type arguments.
-//   f.bar<double, double>(42.42);
-//     ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_33452.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_33452.dart.legacy.expect
index 1b94419..12ba7ad 100644
--- a/pkg/front_end/testcases/regress/issue_33452.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_33452.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_33452.dart:10:29: Warning: Method not found: 'ExistingClass.nonExistingConstructor'.
 //   var x = new ExistingClass.nonExistingConstructor();
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/regress/issue_33452.dart:15:11: Warning: Method not found: 'NonExistingClass'.
 //   x = new NonExistingClass();
 //           ^^^^^^^^^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_33452.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_33452.dart.legacy.transformed.expect
index 22a417b..12ba7ad 100644
--- a/pkg/front_end/testcases/regress/issue_33452.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_33452.dart.legacy.transformed.expect
@@ -1,4 +1,31 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:10:29: Warning: Method not found: 'ExistingClass.nonExistingConstructor'.
+//   var x = new ExistingClass.nonExistingConstructor();
+//                             ^^^^^^^^^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:11:11: Warning: Method not found: 'ExistingClass'.
+//   x = new ExistingClass();
+//           ^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:12:11: Warning: Method not found: 'ExistingClass'.
+//   x = new ExistingClass<String>();
+//           ^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:13:33: Warning: Method not found: 'ExistingClass.nonExistingConstructor'.
+//   x = new ExistingClass<String>.nonExistingConstructor();
+//                                 ^^^^^^^^^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:14:41: Warning: Method not found: 'ExistingClass.nonExistingConstructor'.
+//   x = new ExistingClass<String, String>.nonExistingConstructor();
+//                                         ^^^^^^^^^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:15:11: Warning: Method not found: 'NonExistingClass'.
+//   x = new NonExistingClass();
+//           ^^^^^^^^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_33452.dart.strong.expect b/pkg/front_end/testcases/regress/issue_33452.dart.strong.expect
index 6dc7b76..ef7a4f5 100644
--- a/pkg/front_end/testcases/regress/issue_33452.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_33452.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_33452.dart:10:29: Error: Method not found: 'ExistingClass.nonExistingConstructor'.
 //   var x = new ExistingClass.nonExistingConstructor();
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/regress/issue_33452.dart:15:11: Error: Method not found: 'NonExistingClass'.
 //   x = new NonExistingClass();
 //           ^^^^^^^^^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_33452.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_33452.dart.strong.transformed.expect
index e7c037a..ef7a4f5 100644
--- a/pkg/front_end/testcases/regress/issue_33452.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_33452.dart.strong.transformed.expect
@@ -1,4 +1,31 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:10:29: Error: Method not found: 'ExistingClass.nonExistingConstructor'.
+//   var x = new ExistingClass.nonExistingConstructor();
+//                             ^^^^^^^^^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:11:11: Error: Method not found: 'ExistingClass'.
+//   x = new ExistingClass();
+//           ^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:12:11: Error: Method not found: 'ExistingClass'.
+//   x = new ExistingClass<String>();
+//           ^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:13:33: Error: Method not found: 'ExistingClass.nonExistingConstructor'.
+//   x = new ExistingClass<String>.nonExistingConstructor();
+//                                 ^^^^^^^^^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:14:41: Error: Method not found: 'ExistingClass.nonExistingConstructor'.
+//   x = new ExistingClass<String, String>.nonExistingConstructor();
+//                                         ^^^^^^^^^^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_33452.dart:15:11: Error: Method not found: 'NonExistingClass'.
+//   x = new NonExistingClass();
+//           ^^^^^^^^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34225.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_34225.dart.legacy.expect
index 0735fd9..24e8a2a 100644
--- a/pkg/front_end/testcases/regress/issue_34225.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_34225.dart.legacy.expect
@@ -1,24 +1,15 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_34225.dart:6:14: Error: A class member can't have the same name as the enclosing class.
-//   static set C(v) {} //# 01: compile-time error
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_34225.dart:10:7: Error: A class member can't have the same name as the enclosing class.
-//   set D(v) {} //# 02: compile-time error
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_34225.dart:6:14: Error: A class member can't have the same name as the enclosing class.
-//   static set C(v) {} //# 01: compile-time error
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_34225.dart:10:7: Error: A class member can't have the same name as the enclosing class.
-//   set D(v) {} //# 02: compile-time error
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_34225.dart:6:14: Error: A class member can't have the same name as the enclosing class.
+//   static set C(v) {} //# 01: compile-time error
+//              ^
+//
+// pkg/front_end/testcases/regress/issue_34225.dart:10:7: Error: A class member can't have the same name as the enclosing class.
+//   set D(v) {} //# 02: compile-time error
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34225.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_34225.dart.legacy.transformed.expect
index 69eb56f..24e8a2a 100644
--- a/pkg/front_end/testcases/regress/issue_34225.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34225.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34225.dart:6:14: Error: A class member can't have the same name as the enclosing class.
 //   static set C(v) {} //# 01: compile-time error
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/regress/issue_34225.dart:10:7: Error: A class member can't have the same name as the enclosing class.
 //   set D(v) {} //# 02: compile-time error
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34225.dart.outline.expect b/pkg/front_end/testcases/regress/issue_34225.dart.outline.expect
index b4677c5..4582fae 100644
--- a/pkg/front_end/testcases/regress/issue_34225.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_34225.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34225.dart:6:14: Error: A class member can't have the same name as the enclosing class.
 //   static set C(v) {} //# 01: compile-time error
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/regress/issue_34225.dart:10:7: Error: A class member can't have the same name as the enclosing class.
 //   set D(v) {} //# 02: compile-time error
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34225.dart.strong.expect b/pkg/front_end/testcases/regress/issue_34225.dart.strong.expect
index 2c6e340..bdf0818 100644
--- a/pkg/front_end/testcases/regress/issue_34225.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_34225.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34225.dart:6:14: Error: A class member can't have the same name as the enclosing class.
 //   static set C(v) {} //# 01: compile-time error
@@ -13,18 +15,7 @@
 // Try correcting the name to the name of an existing setter, or defining a setter or field named 'C'.
 //   c.C = 5;
 //     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_34225.dart:6:14: Error: A class member can't have the same name as the enclosing class.
-//   static set C(v) {} //# 01: compile-time error
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_34225.dart:10:7: Error: A class member can't have the same name as the enclosing class.
-//   set D(v) {} //# 02: compile-time error
-//       ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34225.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_34225.dart.strong.transformed.expect
index d6f9092..ef40260 100644
--- a/pkg/front_end/testcases/regress/issue_34225.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34225.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34225.dart:6:14: Error: A class member can't have the same name as the enclosing class.
 //   static set C(v) {} //# 01: compile-time error
@@ -7,8 +9,13 @@
 // pkg/front_end/testcases/regress/issue_34225.dart:10:7: Error: A class member can't have the same name as the enclosing class.
 //   set D(v) {} //# 02: compile-time error
 //       ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_34225.dart:15:5: Error: The setter 'C' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/regress/issue_34225.dart'.
+// Try correcting the name to the name of an existing setter, or defining a setter or field named 'C'.
+//   c.C = 5;
+//     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34291.dart.strong.expect b/pkg/front_end/testcases/regress/issue_34291.dart.strong.expect
index 84cab9dc..ea66cca 100644
--- a/pkg/front_end/testcases/regress/issue_34291.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_34291.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_34291.dart:9:1: Error: Expected 0 type arguments.
-// lib.A<B> foo() {}
-// ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_34291.dart:9:1: Error: Expected 0 type arguments.
-// lib.A<B> foo() {}
-// ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_34291.dart:9:1: Error: Expected 0 type arguments.
+// lib.A<B> foo() {}
+// ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34291.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_34291.dart.strong.transformed.expect
index 35951e5..ea66cca 100644
--- a/pkg/front_end/testcases/regress/issue_34291.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34291.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34291.dart:9:1: Error: Expected 0 type arguments.
 // lib.A<B> foo() {}
 // ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34403.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_34403.dart.legacy.expect
index b7f8bf9..5422427 100644
--- a/pkg/front_end/testcases/regress/issue_34403.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_34403.dart.legacy.expect
@@ -1,168 +1,87 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:16:14: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c1 = C.bar<int>();
-//              ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:18:18: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c2 = new C.bar<int>();
-//                  ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:20:22: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c3 = C<String>.bar<int>();
-//                      ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:22:26: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c4 = new C<String>.bar<int>();
-//                          ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:25:16: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d1 = D.foo<int>();
-//                ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:27:22: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d2 = const D.foo<int>();
-//                      ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:29:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d3 = D<String>.foo<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:31:30: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d4 = const D<String>.foo<int>();
-//                              ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:34:16: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e1 = p.E.bar<int>();
-//                ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:36:20: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e2 = new p.E.bar<int>();
-//                    ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:38:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e3 = p.E<String>.bar<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:40:28: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e4 = new p.E<String>.bar<int>();
-//                            ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:43:18: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f1 = p.F.foo<int>();
-//                  ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:45:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f2 = const p.F.foo<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:47:26: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f3 = p.F<String>.foo<int>();
-//                          ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:49:32: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f4 = const p.F<String>.foo<int>();
-//                                ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:16:14: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c1 = C.bar<int>();
-//              ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:18:18: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c2 = new C.bar<int>();
-//                  ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:20:22: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c3 = C<String>.bar<int>();
-//                      ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:22:26: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c4 = new C<String>.bar<int>();
-//                          ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:25:16: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d1 = D.foo<int>();
-//                ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:27:22: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d2 = const D.foo<int>();
-//                      ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:29:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d3 = D<String>.foo<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:31:30: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d4 = const D<String>.foo<int>();
-//                              ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:34:16: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e1 = p.E.bar<int>();
-//                ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:36:20: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e2 = new p.E.bar<int>();
-//                    ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:38:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e3 = p.E<String>.bar<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:40:28: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e4 = new p.E<String>.bar<int>();
-//                            ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:43:18: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f1 = p.F.foo<int>();
-//                  ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:45:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f2 = const p.F.foo<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:47:26: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f3 = p.F<String>.foo<int>();
-//                          ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:49:32: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f4 = const p.F<String>.foo<int>();
-//                                ^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:16:14: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var c1 = C.bar<int>();
+//              ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:18:18: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var c2 = new C.bar<int>();
+//                  ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:20:22: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var c3 = C<String>.bar<int>();
+//                      ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:22:26: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var c4 = new C<String>.bar<int>();
+//                          ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:25:16: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const d1 = D.foo<int>();
+//                ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:27:22: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const d2 = const D.foo<int>();
+//                      ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:29:24: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const d3 = D<String>.foo<int>();
+//                        ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:31:30: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const d4 = const D<String>.foo<int>();
+//                              ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:34:16: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var e1 = p.E.bar<int>();
+//                ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:36:20: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var e2 = new p.E.bar<int>();
+//                    ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:38:24: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var e3 = p.E<String>.bar<int>();
+//                        ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:40:28: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var e4 = new p.E<String>.bar<int>();
+//                            ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:43:18: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const f1 = p.F.foo<int>();
+//                  ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:45:24: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const f2 = const p.F.foo<int>();
+//                        ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:47:26: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const f3 = p.F<String>.foo<int>();
+//                          ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:49:32: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const f4 = const p.F<String>.foo<int>();
+//                                ^^^
+//
 import self as self;
 import "dart:core" as core;
 import "./issue_34403_lib.dart" as iss;
diff --git a/pkg/front_end/testcases/regress/issue_34403.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_34403.dart.legacy.transformed.expect
index 0c20e23..5422427 100644
--- a/pkg/front_end/testcases/regress/issue_34403.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34403.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34403.dart:16:14: Error: A constructor invocation can't have type arguments on the constructor name.
 // Try to place the type arguments on the class name.
@@ -79,8 +81,7 @@
 // Try to place the type arguments on the class name.
 //   const f4 = const p.F<String>.foo<int>();
 //                                ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 import "./issue_34403_lib.dart" as iss;
diff --git a/pkg/front_end/testcases/regress/issue_34403.dart.strong.expect b/pkg/front_end/testcases/regress/issue_34403.dart.strong.expect
index c932348..447ffcf 100644
--- a/pkg/front_end/testcases/regress/issue_34403.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_34403.dart.strong.expect
@@ -1,168 +1,87 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:16:14: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c1 = C.bar<int>();
-//              ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:18:18: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c2 = new C.bar<int>();
-//                  ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:20:22: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c3 = C<String>.bar<int>();
-//                      ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:22:26: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c4 = new C<String>.bar<int>();
-//                          ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:25:16: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d1 = D.foo<int>();
-//                ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:27:22: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d2 = const D.foo<int>();
-//                      ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:29:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d3 = D<String>.foo<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:31:30: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d4 = const D<String>.foo<int>();
-//                              ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:34:16: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e1 = p.E.bar<int>();
-//                ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:36:20: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e2 = new p.E.bar<int>();
-//                    ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:38:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e3 = p.E<String>.bar<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:40:28: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e4 = new p.E<String>.bar<int>();
-//                            ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:43:18: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f1 = p.F.foo<int>();
-//                  ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:45:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f2 = const p.F.foo<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:47:26: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f3 = p.F<String>.foo<int>();
-//                          ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:49:32: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f4 = const p.F<String>.foo<int>();
-//                                ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:16:14: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c1 = C.bar<int>();
-//              ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:18:18: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c2 = new C.bar<int>();
-//                  ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:20:22: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c3 = C<String>.bar<int>();
-//                      ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:22:26: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var c4 = new C<String>.bar<int>();
-//                          ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:25:16: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d1 = D.foo<int>();
-//                ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:27:22: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d2 = const D.foo<int>();
-//                      ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:29:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d3 = D<String>.foo<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:31:30: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const d4 = const D<String>.foo<int>();
-//                              ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:34:16: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e1 = p.E.bar<int>();
-//                ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:36:20: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e2 = new p.E.bar<int>();
-//                    ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:38:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e3 = p.E<String>.bar<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:40:28: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   var e4 = new p.E<String>.bar<int>();
-//                            ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:43:18: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f1 = p.F.foo<int>();
-//                  ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:45:24: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f2 = const p.F.foo<int>();
-//                        ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:47:26: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f3 = p.F<String>.foo<int>();
-//                          ^^^
-//
-// pkg/front_end/testcases/regress/issue_34403.dart:49:32: Error: A constructor invocation can't have type arguments on the constructor name.
-// Try to place the type arguments on the class name.
-//   const f4 = const p.F<String>.foo<int>();
-//                                ^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:16:14: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var c1 = C.bar<int>();
+//              ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:18:18: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var c2 = new C.bar<int>();
+//                  ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:20:22: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var c3 = C<String>.bar<int>();
+//                      ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:22:26: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var c4 = new C<String>.bar<int>();
+//                          ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:25:16: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const d1 = D.foo<int>();
+//                ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:27:22: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const d2 = const D.foo<int>();
+//                      ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:29:24: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const d3 = D<String>.foo<int>();
+//                        ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:31:30: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const d4 = const D<String>.foo<int>();
+//                              ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:34:16: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var e1 = p.E.bar<int>();
+//                ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:36:20: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var e2 = new p.E.bar<int>();
+//                    ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:38:24: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var e3 = p.E<String>.bar<int>();
+//                        ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:40:28: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   var e4 = new p.E<String>.bar<int>();
+//                            ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:43:18: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const f1 = p.F.foo<int>();
+//                  ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:45:24: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const f2 = const p.F.foo<int>();
+//                        ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:47:26: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const f3 = p.F<String>.foo<int>();
+//                          ^^^
+//
+// pkg/front_end/testcases/regress/issue_34403.dart:49:32: Error: A constructor invocation can't have type arguments on the constructor name.
+// Try to place the type arguments on the class name.
+//   const f4 = const p.F<String>.foo<int>();
+//                                ^^^
+//
 import self as self;
 import "dart:core" as core;
 import "./issue_34403_lib.dart" as iss;
diff --git a/pkg/front_end/testcases/regress/issue_34403.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_34403.dart.strong.transformed.expect
index 40fdb58..447ffcf 100644
--- a/pkg/front_end/testcases/regress/issue_34403.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34403.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34403.dart:16:14: Error: A constructor invocation can't have type arguments on the constructor name.
 // Try to place the type arguments on the class name.
@@ -79,8 +81,7 @@
 // Try to place the type arguments on the class name.
 //   const f4 = const p.F<String>.foo<int>();
 //                                ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 import "./issue_34403_lib.dart" as iss;
diff --git a/pkg/front_end/testcases/regress/issue_34498.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_34498.dart.legacy.expect
index ac8eb61..553b149 100644
--- a/pkg/front_end/testcases/regress/issue_34498.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_34498.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34498.dart:8:3: Warning: 'lib.MyClass' can't be used as a type because 'lib' doesn't refer to an import prefix.
 //   lib.MyClass get lib => null; // (1)
@@ -19,8 +21,7 @@
 // Try removing the type arguments.
 //   T<String> foo() {}
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34498.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_34498.dart.legacy.transformed.expect
index 9b365bf..553b149 100644
--- a/pkg/front_end/testcases/regress/issue_34498.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34498.dart.legacy.transformed.expect
@@ -1,4 +1,27 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_34498.dart:8:3: Warning: 'lib.MyClass' can't be used as a type because 'lib' doesn't refer to an import prefix.
+//   lib.MyClass get lib => null; // (1)
+//   ^^^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_34498.dart:10:3: Warning: 'foo' isn't a type.
+//   foo foo() {}
+//   ^^^
+// pkg/front_end/testcases/regress/issue_34498.dart:10:7: Context: This isn't a type.
+//   foo foo() {}
+//       ^^^
+//
+// pkg/front_end/testcases/regress/issue_34498.dart:12:3: Warning: Type 'Missing' not found.
+//   Missing bar() {}
+//   ^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_34498.dart:20:3: Warning: Can't use type arguments with type variable 'T'.
+// Try removing the type arguments.
+//   T<String> foo() {}
+//   ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34498.dart.outline.expect b/pkg/front_end/testcases/regress/issue_34498.dart.outline.expect
index 394d76e..7f86da8 100644
--- a/pkg/front_end/testcases/regress/issue_34498.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_34498.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34498.dart:8:3: Warning: 'lib.MyClass' can't be used as a type because 'lib' doesn't refer to an import prefix.
 //   lib.MyClass get lib => null; // (1)
@@ -19,8 +21,7 @@
 // Try removing the type arguments.
 //   T<String> foo() {}
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34498.dart.strong.expect b/pkg/front_end/testcases/regress/issue_34498.dart.strong.expect
index 2bb5096..cbfeeae 100644
--- a/pkg/front_end/testcases/regress/issue_34498.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_34498.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34498.dart:8:3: Error: 'lib.MyClass' can't be used as a type because 'lib' doesn't refer to an import prefix.
 //   lib.MyClass get lib => null; // (1)
@@ -19,27 +21,7 @@
 // Try removing the type arguments.
 //   T<String> foo() {}
 //   ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_34498.dart:8:3: Error: 'lib.MyClass' can't be used as a type because 'lib' doesn't refer to an import prefix.
-//   lib.MyClass get lib => null; // (1)
-//   ^^^^^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34498.dart:10:3: Error: 'foo' isn't a type.
-//   foo foo() {}
-//   ^^^
-//
-// pkg/front_end/testcases/regress/issue_34498.dart:12:3: Error: Type 'Missing' not found.
-//   Missing bar() {}
-//   ^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34498.dart:20:3: Error: Can't use type arguments with type variable 'T'.
-// Try removing the type arguments.
-//   T<String> foo() {}
-//   ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34498.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_34498.dart.strong.transformed.expect
index c2f20c6..cbfeeae 100644
--- a/pkg/front_end/testcases/regress/issue_34498.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34498.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34498.dart:8:3: Error: 'lib.MyClass' can't be used as a type because 'lib' doesn't refer to an import prefix.
 //   lib.MyClass get lib => null; // (1)
@@ -7,6 +9,9 @@
 // pkg/front_end/testcases/regress/issue_34498.dart:10:3: Error: 'foo' isn't a type.
 //   foo foo() {}
 //   ^^^
+// pkg/front_end/testcases/regress/issue_34498.dart:10:7: Context: This isn't a type.
+//   foo foo() {}
+//       ^^^
 //
 // pkg/front_end/testcases/regress/issue_34498.dart:12:3: Error: Type 'Missing' not found.
 //   Missing bar() {}
@@ -16,8 +21,7 @@
 // Try removing the type arguments.
 //   T<String> foo() {}
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34563.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_34563.dart.legacy.expect
index 5ff2161..d287b8c 100644
--- a/pkg/front_end/testcases/regress/issue_34563.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_34563.dart.legacy.expect
@@ -1,40 +1,23 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:9:10: Error: Expected 'on' instead of this.
-// mixin M2 extend M1 {}
-//          ^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:11:10: Error: Expected 'on' instead of this.
-// mixin M3 extends M1 {}
-//          ^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:17:10: Error: Expected 'extends' instead of this.
-// class C2 extend C1 with M2 {}
-//          ^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:19:10: Error: Expected 'extends' instead of this.
-// class C3 on C1 with M3 {}
-//          ^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:9:10: Error: Expected 'on' instead of this.
-// mixin M2 extend M1 {}
-//          ^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:11:10: Error: Expected 'on' instead of this.
-// mixin M3 extends M1 {}
-//          ^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:17:10: Error: Expected 'extends' instead of this.
-// class C2 extend C1 with M2 {}
-//          ^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:19:10: Error: Expected 'extends' instead of this.
-// class C3 on C1 with M3 {}
-//          ^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_34563.dart:9:10: Error: Expected 'on' instead of this.
+// mixin M2 extend M1 {}
+//          ^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_34563.dart:11:10: Error: Expected 'on' instead of this.
+// mixin M3 extends M1 {}
+//          ^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_34563.dart:17:10: Error: Expected 'extends' instead of this.
+// class C2 extend C1 with M2 {}
+//          ^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_34563.dart:19:10: Error: Expected 'extends' instead of this.
+// class C3 on C1 with M3 {}
+//          ^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34563.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_34563.dart.legacy.transformed.expect
index 3e681c4..d287b8c 100644
--- a/pkg/front_end/testcases/regress/issue_34563.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34563.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34563.dart:9:10: Error: Expected 'on' instead of this.
 // mixin M2 extend M1 {}
@@ -15,8 +17,7 @@
 // pkg/front_end/testcases/regress/issue_34563.dart:19:10: Error: Expected 'extends' instead of this.
 // class C3 on C1 with M3 {}
 //          ^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34563.dart.outline.expect b/pkg/front_end/testcases/regress/issue_34563.dart.outline.expect
index 0b65eb9..7e6e9d9 100644
--- a/pkg/front_end/testcases/regress/issue_34563.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_34563.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34563.dart:9:10: Error: Expected 'on' instead of this.
 // mixin M2 extend M1 {}
@@ -15,8 +17,7 @@
 // pkg/front_end/testcases/regress/issue_34563.dart:19:10: Error: Expected 'extends' instead of this.
 // class C3 on C1 with M3 {}
 //          ^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34563.dart.strong.expect b/pkg/front_end/testcases/regress/issue_34563.dart.strong.expect
index add69c6..9bfa9d9 100644
--- a/pkg/front_end/testcases/regress/issue_34563.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_34563.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34563.dart:9:10: Error: Expected 'on' instead of this.
 // mixin M2 extend M1 {}
@@ -39,26 +41,7 @@
 // Try correcting the name to the name of an existing getter, or defining a getter or field named 'c'.
 //   c3.m + c3.c;
 //             ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_34563.dart:9:10: Error: Expected 'on' instead of this.
-// mixin M2 extend M1 {}
-//          ^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:11:10: Error: Expected 'on' instead of this.
-// mixin M3 extends M1 {}
-//          ^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:17:10: Error: Expected 'extends' instead of this.
-// class C2 extend C1 with M2 {}
-//          ^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34563.dart:19:10: Error: Expected 'extends' instead of this.
-// class C3 on C1 with M3 {}
-//          ^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34563.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_34563.dart.strong.transformed.expect
index 98e20c3..941e480 100644
--- a/pkg/front_end/testcases/regress/issue_34563.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34563.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34563.dart:9:10: Error: Expected 'on' instead of this.
 // mixin M2 extend M1 {}
@@ -15,8 +17,31 @@
 // pkg/front_end/testcases/regress/issue_34563.dart:19:10: Error: Expected 'extends' instead of this.
 // class C3 on C1 with M3 {}
 //          ^^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_34563.dart:23:6: Error: The getter 'm' isn't defined for the class 'C2'.
+//  - 'C2' is from 'pkg/front_end/testcases/regress/issue_34563.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'm'.
+//   c2.m + c2.c;
+//      ^
+//
+// pkg/front_end/testcases/regress/issue_34563.dart:23:13: Error: The getter 'c' isn't defined for the class 'C2'.
+//  - 'C2' is from 'pkg/front_end/testcases/regress/issue_34563.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'c'.
+//   c2.m + c2.c;
+//             ^
+//
+// pkg/front_end/testcases/regress/issue_34563.dart:25:6: Error: The getter 'm' isn't defined for the class 'C3'.
+//  - 'C3' is from 'pkg/front_end/testcases/regress/issue_34563.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'm'.
+//   c3.m + c3.c;
+//      ^
+//
+// pkg/front_end/testcases/regress/issue_34563.dart:25:13: Error: The getter 'c' isn't defined for the class 'C3'.
+//  - 'C3' is from 'pkg/front_end/testcases/regress/issue_34563.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'c'.
+//   c3.m + c3.c;
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34610.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_34610.dart.legacy.expect
index ceb8d46..6a16c4e 100644
--- a/pkg/front_end/testcases/regress/issue_34610.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_34610.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34610.dart:5:16: Error: Expected '{' before this.
 // class A { get A.named => null; get bar => 1; }
@@ -31,37 +33,7 @@
 // Try removing the return type.
 // class C { C.named => null; get bar => 1; }
 //                      ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_34610.dart:5:16: Error: Expected '{' before this.
-// class A { get A.named => null; get bar => 1; }
-//                ^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:5:15: Error: A class member can't have the same name as the enclosing class.
-// class A { get A.named => null; get bar => 1; }
-//               ^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:5:16: Error: Expected a class member, but got '.'.
-// class A { get A.named => null; get bar => 1; }
-//                ^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:5:17: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class A { get A.named => null; get bar => 1; }
-//                 ^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:7:11: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class B { B.named : super(); get bar => 1; }
-//           ^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:9:11: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class C { C.named => null; get bar => 1; }
-//           ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34610.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_34610.dart.legacy.transformed.expect
index fb45946..6a16c4e 100644
--- a/pkg/front_end/testcases/regress/issue_34610.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34610.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34610.dart:5:16: Error: Expected '{' before this.
 // class A { get A.named => null; get bar => 1; }
@@ -26,8 +28,12 @@
 // Try adding a parameter list to the method declaration.
 // class C { C.named => null; get bar => 1; }
 //           ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_34610.dart:9:22: Error: Constructors can't have a return type.
+// Try removing the return type.
+// class C { C.named => null; get bar => 1; }
+//                      ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34610.dart.outline.expect b/pkg/front_end/testcases/regress/issue_34610.dart.outline.expect
index 7e39069..6f92c1f 100644
--- a/pkg/front_end/testcases/regress/issue_34610.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_34610.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34610.dart:5:16: Error: Expected '{' before this.
 // class A { get A.named => null; get bar => 1; }
@@ -26,8 +28,7 @@
 // Try adding a parameter list to the method declaration.
 // class C { C.named => null; get bar => 1; }
 //           ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34610.dart.strong.expect b/pkg/front_end/testcases/regress/issue_34610.dart.strong.expect
index 568654c..c127bbc 100644
--- a/pkg/front_end/testcases/regress/issue_34610.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_34610.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34610.dart:5:16: Error: Expected '{' before this.
 // class A { get A.named => null; get bar => 1; }
@@ -31,37 +33,7 @@
 // Try removing the return type.
 // class C { C.named => null; get bar => 1; }
 //                      ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_34610.dart:5:16: Error: Expected '{' before this.
-// class A { get A.named => null; get bar => 1; }
-//                ^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:5:15: Error: A class member can't have the same name as the enclosing class.
-// class A { get A.named => null; get bar => 1; }
-//               ^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:5:16: Error: Expected a class member, but got '.'.
-// class A { get A.named => null; get bar => 1; }
-//                ^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:5:17: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class A { get A.named => null; get bar => 1; }
-//                 ^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:7:11: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class B { B.named : super(); get bar => 1; }
-//           ^
-//
-// pkg/front_end/testcases/regress/issue_34610.dart:9:11: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class C { C.named => null; get bar => 1; }
-//           ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34610.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_34610.dart.strong.transformed.expect
index ca2cebe..c127bbc 100644
--- a/pkg/front_end/testcases/regress/issue_34610.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34610.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34610.dart:5:16: Error: Expected '{' before this.
 // class A { get A.named => null; get bar => 1; }
@@ -26,8 +28,12 @@
 // Try adding a parameter list to the method declaration.
 // class C { C.named => null; get bar => 1; }
 //           ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_34610.dart:9:22: Error: Constructors can't have a return type.
+// Try removing the return type.
+// class C { C.named => null; get bar => 1; }
+//                      ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34614.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_34614.dart.legacy.expect
index 004bcd9..702299b 100644
--- a/pkg/front_end/testcases/regress/issue_34614.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_34614.dart.legacy.expect
@@ -1,34 +1,20 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected an identifier, but got '}'.
-// class C { C. }
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:11: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class C { C. }
-//           ^
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected '{' before this.
-// class C { C. }
-//              ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected an identifier, but got '}'.
-// class C { C. }
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:11: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class C { C. }
-//           ^
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected '{' before this.
-// class C { C. }
-//              ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected an identifier, but got '}'.
+// class C { C. }
+//              ^
+//
+// pkg/front_end/testcases/regress/issue_34614.dart:5:11: Error: A method declaration needs an explicit list of parameters.
+// Try adding a parameter list to the method declaration.
+// class C { C. }
+//           ^
+//
+// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected '{' before this.
+// class C { C. }
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34614.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_34614.dart.legacy.transformed.expect
index 85f5296..702299b 100644
--- a/pkg/front_end/testcases/regress/issue_34614.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34614.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected an identifier, but got '}'.
 // class C { C. }
@@ -12,8 +14,7 @@
 // pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected '{' before this.
 // class C { C. }
 //              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34614.dart.outline.expect b/pkg/front_end/testcases/regress/issue_34614.dart.outline.expect
index 6cd7c77..2b58976 100644
--- a/pkg/front_end/testcases/regress/issue_34614.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_34614.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected an identifier, but got '}'.
 // class C { C. }
@@ -12,8 +14,7 @@
 // pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected '{' before this.
 // class C { C. }
 //              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34614.dart.strong.expect b/pkg/front_end/testcases/regress/issue_34614.dart.strong.expect
index d36a30c..a8a4eff 100644
--- a/pkg/front_end/testcases/regress/issue_34614.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_34614.dart.strong.expect
@@ -1,34 +1,20 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected an identifier, but got '}'.
-// class C { C. }
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:11: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class C { C. }
-//           ^
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected '{' before this.
-// class C { C. }
-//              ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected an identifier, but got '}'.
-// class C { C. }
-//              ^
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:11: Error: A method declaration needs an explicit list of parameters.
-// Try adding a parameter list to the method declaration.
-// class C { C. }
-//           ^
-//
-// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected '{' before this.
-// class C { C. }
-//              ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected an identifier, but got '}'.
+// class C { C. }
+//              ^
+//
+// pkg/front_end/testcases/regress/issue_34614.dart:5:11: Error: A method declaration needs an explicit list of parameters.
+// Try adding a parameter list to the method declaration.
+// class C { C. }
+//           ^
+//
+// pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected '{' before this.
+// class C { C. }
+//              ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34614.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_34614.dart.strong.transformed.expect
index 225711f..a8a4eff 100644
--- a/pkg/front_end/testcases/regress/issue_34614.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34614.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected an identifier, but got '}'.
 // class C { C. }
@@ -12,8 +14,7 @@
 // pkg/front_end/testcases/regress/issue_34614.dart:5:14: Error: Expected '{' before this.
 // class C { C. }
 //              ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34850.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_34850.dart.legacy.expect
index a866654..477d5fd 100644
--- a/pkg/front_end/testcases/regress/issue_34850.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_34850.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34850.dart:5:1: Error: Expected a declaration, but got '<'.
 // <foo<
@@ -39,35 +41,7 @@
 // pkg/front_end/testcases/regress/issue_34850.dart:12:1: Context: This isn't a type.
 // Future<List<int>> f2() async => null;
 // ^^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_34850.dart:5:1: Error: Expected a declaration, but got '<'.
-// <foo<
-// ^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:7:1: Error: Expected '>' after this.
-// int f1() {
-// ^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:12:8: Error: Expected '>' after this.
-// Future<List<int>> f2() async => null;
-//        ^^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:12:1: Error: A function declaration needs an explicit list of parameters.
-// Try adding a parameter list to the function declaration.
-// Future<List<int>> f2() async => null;
-// ^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:12:19: Error: Expected '{' before this.
-// Future<List<int>> f2() async => null;
-//                   ^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:14:13: Error: Expected a type, but got '>>'.
-// Future<List<>> f3() async {
-//             ^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34850.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_34850.dart.legacy.transformed.expect
index 38947f8..e3ef37d 100644
--- a/pkg/front_end/testcases/regress/issue_34850.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34850.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34850.dart:5:1: Error: Expected a declaration, but got '<'.
 // <foo<
@@ -24,8 +26,22 @@
 // pkg/front_end/testcases/regress/issue_34850.dart:14:13: Error: Expected a type, but got '>>'.
 // Future<List<>> f3() async {
 //             ^^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:5:2: Warning: Type 'foo' not found.
+// <foo<
+//  ^^^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:11:1: Warning: Type 'foo' not found.
+// foo
+// ^^^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:14:1: Warning: 'Future' isn't a type.
+// Future<List<>> f3() async {
+// ^^^^^^
+// pkg/front_end/testcases/regress/issue_34850.dart:12:1: Context: This isn't a type.
+// Future<List<int>> f2() async => null;
+// ^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/regress/issue_34850.dart.outline.expect b/pkg/front_end/testcases/regress/issue_34850.dart.outline.expect
index 1bd0032..d7332cd 100644
--- a/pkg/front_end/testcases/regress/issue_34850.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_34850.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34850.dart:5:1: Error: Expected a declaration, but got '<'.
 // <foo<
@@ -39,8 +41,7 @@
 // pkg/front_end/testcases/regress/issue_34850.dart:12:1: Context: This isn't a type.
 // Future<List<int>> f2() async => null;
 // ^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34850.dart.strong.expect b/pkg/front_end/testcases/regress/issue_34850.dart.strong.expect
index 1f1bd88..f3100e5 100644
--- a/pkg/front_end/testcases/regress/issue_34850.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_34850.dart.strong.expect
@@ -1,90 +1,48 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:5:1: Error: Expected a declaration, but got '<'.
-// <foo<
-// ^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:7:1: Error: Expected '>' after this.
-// int f1() {
-// ^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:12:8: Error: Expected '>' after this.
-// Future<List<int>> f2() async => null;
-//        ^^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:12:1: Error: A function declaration needs an explicit list of parameters.
-// Try adding a parameter list to the function declaration.
-// Future<List<int>> f2() async => null;
-// ^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:12:19: Error: Expected '{' before this.
-// Future<List<int>> f2() async => null;
-//                   ^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:14:13: Error: Expected a type, but got '>>'.
-// Future<List<>> f3() async {
-//             ^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:5:2: Error: Expected 0 type arguments.
-// <foo<
-//  ^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:11:1: Error: Type 'foo' not found.
-// foo
-// ^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:14:1: Error: Expected 0 type arguments.
-// Future<List<>> f3() async {
-// ^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:14:16: Error: Functions marked 'async' must have a return type assignable to 'Future'.
-// Future<List<>> f3() async {
-//                ^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:5:1: Error: Expected a declaration, but got '<'.
-// <foo<
-// ^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:7:1: Error: Expected '>' after this.
-// int f1() {
-// ^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:12:8: Error: Expected '>' after this.
-// Future<List<int>> f2() async => null;
-//        ^^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:12:1: Error: A function declaration needs an explicit list of parameters.
-// Try adding a parameter list to the function declaration.
-// Future<List<int>> f2() async => null;
-// ^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:12:19: Error: Expected '{' before this.
-// Future<List<int>> f2() async => null;
-//                   ^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:14:13: Error: Expected a type, but got '>>'.
-// Future<List<>> f3() async {
-//             ^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:5:2: Error: Expected 0 type arguments.
-// <foo<
-//  ^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:11:1: Error: Type 'foo' not found.
-// foo
-// ^^^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:14:1: Error: Expected 0 type arguments.
-// Future<List<>> f3() async {
-// ^
-//
-// pkg/front_end/testcases/regress/issue_34850.dart:14:16: Error: Functions marked 'async' must have a return type assignable to 'Future'.
-// Future<List<>> f3() async {
-//                ^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:5:1: Error: Expected a declaration, but got '<'.
+// <foo<
+// ^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:7:1: Error: Expected '>' after this.
+// int f1() {
+// ^^^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:12:8: Error: Expected '>' after this.
+// Future<List<int>> f2() async => null;
+//        ^^^^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:12:1: Error: A function declaration needs an explicit list of parameters.
+// Try adding a parameter list to the function declaration.
+// Future<List<int>> f2() async => null;
+// ^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:12:19: Error: Expected '{' before this.
+// Future<List<int>> f2() async => null;
+//                   ^^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:14:13: Error: Expected a type, but got '>>'.
+// Future<List<>> f3() async {
+//             ^^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:5:2: Error: Expected 0 type arguments.
+// <foo<
+//  ^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:11:1: Error: Type 'foo' not found.
+// foo
+// ^^^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:14:1: Error: Expected 0 type arguments.
+// Future<List<>> f3() async {
+// ^
+//
+// pkg/front_end/testcases/regress/issue_34850.dart:14:16: Error: Functions marked 'async' must have a return type assignable to 'Future'.
+// Future<List<>> f3() async {
+//                ^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_34850.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_34850.dart.strong.transformed.expect
index 72bac6c..22df880 100644
--- a/pkg/front_end/testcases/regress/issue_34850.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34850.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_34850.dart:5:1: Error: Expected a declaration, but got '<'.
 // <foo<
@@ -40,8 +42,7 @@
 // pkg/front_end/testcases/regress/issue_34850.dart:14:16: Error: Functions marked 'async' must have a return type assignable to 'Future'.
 // Future<List<>> f3() async {
 //                ^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/regress/issue_35151.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_35151.dart.legacy.expect
index de1108c..29b35f0 100644
--- a/pkg/front_end/testcases/regress/issue_35151.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_35151.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35151.dart:10:15: Error: A field can only be initialized in it's declaring class
 // Try passing a value into the superclass constructor, or moving the initialization into the constructor body.
@@ -13,15 +15,7 @@
 // pkg/front_end/testcases/regress/issue_35151.dart:14:9: Error: Can't access 'super' in a field initializer.
 //   C() : super = 42;
 //         ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35151.dart:10:15: Error: A field can only be initialized in it's declaring class
-// Try passing a value into the superclass constructor, or moving the initialization into the constructor body.
-//   B() : super.a = 42;
-//               ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35151.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_35151.dart.legacy.transformed.expect
index 8b2425d..29b35f0 100644
--- a/pkg/front_end/testcases/regress/issue_35151.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35151.dart.legacy.transformed.expect
@@ -1,11 +1,21 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35151.dart:10:15: Error: A field can only be initialized in it's declaring class
 // Try passing a value into the superclass constructor, or moving the initialization into the constructor body.
 //   B() : super.a = 42;
 //               ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_35151.dart:10:15: Error: Not a valid initializer.
+// To initialize a field, use the syntax 'name = value'.
+//   B() : super.a = 42;
+//               ^
+//
+// pkg/front_end/testcases/regress/issue_35151.dart:14:9: Error: Can't access 'super' in a field initializer.
+//   C() : super = 42;
+//         ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35151.dart.outline.expect b/pkg/front_end/testcases/regress/issue_35151.dart.outline.expect
index 0699365..314a508 100644
--- a/pkg/front_end/testcases/regress/issue_35151.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_35151.dart.outline.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35151.dart:10:15: Error: A field can only be initialized in it's declaring class
 // Try passing a value into the superclass constructor, or moving the initialization into the constructor body.
 //   B() : super.a = 42;
 //               ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35151.dart.strong.expect b/pkg/front_end/testcases/regress/issue_35151.dart.strong.expect
index 6f8a3c8..b8a15c7 100644
--- a/pkg/front_end/testcases/regress/issue_35151.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_35151.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35151.dart:10:15: Error: A field can only be initialized in it's declaring class
 // Try passing a value into the superclass constructor, or moving the initialization into the constructor body.
@@ -13,15 +15,7 @@
 // pkg/front_end/testcases/regress/issue_35151.dart:14:9: Error: Can't access 'super' in a field initializer.
 //   C() : super = 42;
 //         ^^^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35151.dart:10:15: Error: A field can only be initialized in it's declaring class
-// Try passing a value into the superclass constructor, or moving the initialization into the constructor body.
-//   B() : super.a = 42;
-//               ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35151.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_35151.dart.strong.transformed.expect
index de1b159..b8a15c7 100644
--- a/pkg/front_end/testcases/regress/issue_35151.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35151.dart.strong.transformed.expect
@@ -1,11 +1,21 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35151.dart:10:15: Error: A field can only be initialized in it's declaring class
 // Try passing a value into the superclass constructor, or moving the initialization into the constructor body.
 //   B() : super.a = 42;
 //               ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_35151.dart:10:15: Error: Not a valid initializer.
+// To initialize a field, use the syntax 'name = value'.
+//   B() : super.a = 42;
+//               ^
+//
+// pkg/front_end/testcases/regress/issue_35151.dart:14:9: Error: Can't access 'super' in a field initializer.
+//   C() : super = 42;
+//         ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35213.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_35213.dart.legacy.expect
index 1280dd9..59d39ba 100644
--- a/pkg/front_end/testcases/regress/issue_35213.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_35213.dart.legacy.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_35213.dart:5:9: Error: Expected ',' before this.
-// f(int a int b) { }
-//         ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_35213.dart:5:9: Error: Expected ',' before this.
-// f(int a int b) { }
-//         ^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_35213.dart:5:9: Error: Expected ',' before this.
+// f(int a int b) { }
+//         ^^^
+//
 import self as self;
 import "dart:core" as core;
 
@@ -18,4 +13,3 @@
 static method main() → dynamic {
   self::f(2, 3);
 }
-
diff --git a/pkg/front_end/testcases/regress/issue_35213.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_35213.dart.legacy.transformed.expect
index a66ce9c..59d39ba 100644
--- a/pkg/front_end/testcases/regress/issue_35213.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35213.dart.legacy.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35213.dart:5:9: Error: Expected ',' before this.
 // f(int a int b) { }
 //         ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
@@ -12,4 +13,3 @@
 static method main() → dynamic {
   self::f(2, 3);
 }
-
diff --git a/pkg/front_end/testcases/regress/issue_35213.dart.outline.expect b/pkg/front_end/testcases/regress/issue_35213.dart.outline.expect
index 040a0f3..27fe4c0 100644
--- a/pkg/front_end/testcases/regress/issue_35213.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_35213.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35213.dart:5:9: Error: Expected ',' before this.
 // f(int a int b) { }
 //         ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35213.dart.strong.expect b/pkg/front_end/testcases/regress/issue_35213.dart.strong.expect
index cd5fe47..59d39ba 100644
--- a/pkg/front_end/testcases/regress/issue_35213.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_35213.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/regress/issue_35213.dart:5:9: Error: Expected ',' before this.
-// f(int a int b) { }
-//         ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/regress/issue_35213.dart:5:9: Error: Expected ',' before this.
-// f(int a int b) { }
-//         ^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/regress/issue_35213.dart:5:9: Error: Expected ',' before this.
+// f(int a int b) { }
+//         ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35213.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_35213.dart.strong.transformed.expect
index 1f16d48..59d39ba 100644
--- a/pkg/front_end/testcases/regress/issue_35213.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35213.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35213.dart:5:9: Error: Expected ',' before this.
 // f(int a int b) { }
 //         ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35258.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_35258.dart.legacy.expect
index dd57ef3..f3cf819 100644
--- a/pkg/front_end/testcases/regress/issue_35258.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_35258.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35258.dart:13:3: Error: 'C' is already declared in this scope.
 //   C(this.d) {}
@@ -15,19 +17,7 @@
 // Try to initialize the field in the declaration or in every constructor.
 //   final d;
 //         ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35258.dart:13:3: Error: 'C' is already declared in this scope.
-//   C(this.d) {}
-//   ^
-//
-// pkg/front_end/testcases/regress/issue_35258.dart:10:9: Error: Final field 'd' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final d;
-//         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35258.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_35258.dart.legacy.transformed.expect
index 89e7a08..f3cf819 100644
--- a/pkg/front_end/testcases/regress/issue_35258.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35258.dart.legacy.transformed.expect
@@ -1,15 +1,23 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35258.dart:13:3: Error: 'C' is already declared in this scope.
 //   C(this.d) {}
 //   ^
+// pkg/front_end/testcases/regress/issue_35258.dart:12:3: Context: Previous declaration of 'C'.
+//   C() {}
+//   ^
+//
+// pkg/front_end/testcases/regress/issue_35258.dart:6:7: Error: Can't use 'C' because it is declared more than once.
+//   new C(42);
+//       ^
 //
 // pkg/front_end/testcases/regress/issue_35258.dart:10:9: Error: Final field 'd' is not initialized.
 // Try to initialize the field in the declaration or in every constructor.
 //   final d;
 //         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35258.dart.outline.expect b/pkg/front_end/testcases/regress/issue_35258.dart.outline.expect
index 6573c01..1d44eb7 100644
--- a/pkg/front_end/testcases/regress/issue_35258.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_35258.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35258.dart:13:3: Error: 'C' is already declared in this scope.
 //   C(this.d) {}
@@ -6,8 +8,7 @@
 // pkg/front_end/testcases/regress/issue_35258.dart:12:3: Context: Previous declaration of 'C'.
 //   C() {}
 //   ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35258.dart.strong.expect b/pkg/front_end/testcases/regress/issue_35258.dart.strong.expect
index ee9cdb0..cd8f0cb 100644
--- a/pkg/front_end/testcases/regress/issue_35258.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_35258.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35258.dart:13:3: Error: 'C' is already declared in this scope.
 //   C(this.d) {}
@@ -15,19 +17,7 @@
 // Try to initialize the field in the declaration or in every constructor.
 //   final d;
 //         ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35258.dart:13:3: Error: 'C' is already declared in this scope.
-//   C(this.d) {}
-//   ^
-//
-// pkg/front_end/testcases/regress/issue_35258.dart:10:9: Error: Final field 'd' is not initialized.
-// Try to initialize the field in the declaration or in every constructor.
-//   final d;
-//         ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35258.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_35258.dart.strong.transformed.expect
index dc46e1b..cd8f0cb 100644
--- a/pkg/front_end/testcases/regress/issue_35258.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35258.dart.strong.transformed.expect
@@ -1,15 +1,23 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35258.dart:13:3: Error: 'C' is already declared in this scope.
 //   C(this.d) {}
 //   ^
+// pkg/front_end/testcases/regress/issue_35258.dart:12:3: Context: Previous declaration of 'C'.
+//   C() {}
+//   ^
+//
+// pkg/front_end/testcases/regress/issue_35258.dart:6:7: Error: Can't use 'C' because it is declared more than once.
+//   new C(42);
+//       ^
 //
 // pkg/front_end/testcases/regress/issue_35258.dart:10:9: Error: Final field 'd' is not initialized.
 // Try to initialize the field in the declaration or in every constructor.
 //   final d;
 //         ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35259.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_35259.dart.legacy.expect
index cdee012..0360cf4 100644
--- a/pkg/front_end/testcases/regress/issue_35259.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_35259.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35259.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = Unresolved;
@@ -26,14 +28,7 @@
 // pkg/front_end/testcases/regress/issue_35259.dart:11:13: Error: Can't use 'Supertype' because it is declared more than once.
 //   print(new Supertype());
 //             ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35259.dart:7:11: Error: 'Supertype' is already declared in this scope.
-//   factory Supertype() = Unresolved;
-//           ^^^^^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35259.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_35259.dart.legacy.transformed.expect
index b95387a..0360cf4 100644
--- a/pkg/front_end/testcases/regress/issue_35259.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35259.dart.legacy.transformed.expect
@@ -1,10 +1,34 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35259.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = Unresolved;
 //           ^^^^^^^^^
-
-library;
+// pkg/front_end/testcases/regress/issue_35259.dart:6:11: Context: Previous declaration of 'Supertype'.
+//   factory Supertype() = Unresolved;
+//           ^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_35259.dart:6:25: Warning: Couldn't find constructor 'Unresolved'.
+//   factory Supertype() = Unresolved;
+//                         ^
+//
+// pkg/front_end/testcases/regress/issue_35259.dart:7:25: Warning: Couldn't find constructor 'Unresolved'.
+//   factory Supertype() = Unresolved;
+//                         ^
+//
+// pkg/front_end/testcases/regress/issue_35259.dart:7:11: Warning: Redirection constructor target not found: 'Unresolved'
+//   factory Supertype() = Unresolved;
+//           ^
+//
+// pkg/front_end/testcases/regress/issue_35259.dart:6:11: Warning: Redirection constructor target not found: 'Unresolved'
+//   factory Supertype() = Unresolved;
+//           ^
+//
+// pkg/front_end/testcases/regress/issue_35259.dart:11:13: Error: Can't use 'Supertype' because it is declared more than once.
+//   print(new Supertype());
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35259.dart.outline.expect b/pkg/front_end/testcases/regress/issue_35259.dart.outline.expect
index 93650ba..7137976 100644
--- a/pkg/front_end/testcases/regress/issue_35259.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_35259.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35259.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = Unresolved;
@@ -22,8 +24,7 @@
 // pkg/front_end/testcases/regress/issue_35259.dart:6:11: Warning: Redirection constructor target not found: 'Unresolved'
 //   factory Supertype() = Unresolved;
 //           ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35259.dart.strong.expect b/pkg/front_end/testcases/regress/issue_35259.dart.strong.expect
index c803a06..f3d633c 100644
--- a/pkg/front_end/testcases/regress/issue_35259.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_35259.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35259.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = Unresolved;
@@ -26,30 +28,7 @@
 // pkg/front_end/testcases/regress/issue_35259.dart:11:13: Error: Can't use 'Supertype' because it is declared more than once.
 //   print(new Supertype());
 //             ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35259.dart:7:11: Error: 'Supertype' is already declared in this scope.
-//   factory Supertype() = Unresolved;
-//           ^^^^^^^^^
-//
-// pkg/front_end/testcases/regress/issue_35259.dart:6:25: Error: Couldn't find constructor 'Unresolved'.
-//   factory Supertype() = Unresolved;
-//                         ^
-//
-// pkg/front_end/testcases/regress/issue_35259.dart:7:25: Error: Couldn't find constructor 'Unresolved'.
-//   factory Supertype() = Unresolved;
-//                         ^
-//
-// pkg/front_end/testcases/regress/issue_35259.dart:7:11: Error: Redirection constructor target not found: 'Unresolved'
-//   factory Supertype() = Unresolved;
-//           ^
-//
-// pkg/front_end/testcases/regress/issue_35259.dart:6:11: Error: Redirection constructor target not found: 'Unresolved'
-//   factory Supertype() = Unresolved;
-//           ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35259.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_35259.dart.strong.transformed.expect
index ff84c51..6b7b15d 100644
--- a/pkg/front_end/testcases/regress/issue_35259.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35259.dart.strong.transformed.expect
@@ -1,8 +1,13 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35259.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = Unresolved;
 //           ^^^^^^^^^
+// pkg/front_end/testcases/regress/issue_35259.dart:6:11: Context: Previous declaration of 'Supertype'.
+//   factory Supertype() = Unresolved;
+//           ^^^^^^^^^
 //
 // pkg/front_end/testcases/regress/issue_35259.dart:6:25: Error: Couldn't find constructor 'Unresolved'.
 //   factory Supertype() = Unresolved;
@@ -19,8 +24,11 @@
 // pkg/front_end/testcases/regress/issue_35259.dart:6:11: Error: Redirection constructor target not found: 'Unresolved'
 //   factory Supertype() = Unresolved;
 //           ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_35259.dart:11:13: Error: Can't use 'Supertype' because it is declared more than once.
+//   print(new Supertype());
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35260.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_35260.dart.legacy.expect
index 37f976f..381ea3c 100644
--- a/pkg/front_end/testcases/regress/issue_35260.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_35260.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35260.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = X;
@@ -10,14 +12,7 @@
 // pkg/front_end/testcases/regress/issue_35260.dart:15:13: Error: Can't use 'Supertype' because it is declared more than once.
 //   X x = new Supertype();
 //             ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35260.dart:7:11: Error: 'Supertype' is already declared in this scope.
-//   factory Supertype() = X;
-//           ^^^^^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35260.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_35260.dart.legacy.transformed.expect
index 64871ce..381ea3c 100644
--- a/pkg/front_end/testcases/regress/issue_35260.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35260.dart.legacy.transformed.expect
@@ -1,10 +1,18 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35260.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = X;
 //           ^^^^^^^^^
-
-library;
+// pkg/front_end/testcases/regress/issue_35260.dart:6:11: Context: Previous declaration of 'Supertype'.
+//   factory Supertype() = X;
+//           ^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_35260.dart:15:13: Error: Can't use 'Supertype' because it is declared more than once.
+//   X x = new Supertype();
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35260.dart.outline.expect b/pkg/front_end/testcases/regress/issue_35260.dart.outline.expect
index 4f6b056..a489ec3 100644
--- a/pkg/front_end/testcases/regress/issue_35260.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_35260.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35260.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = X;
@@ -6,8 +8,7 @@
 // pkg/front_end/testcases/regress/issue_35260.dart:6:11: Context: Previous declaration of 'Supertype'.
 //   factory Supertype() = X;
 //           ^^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35260.dart.strong.expect b/pkg/front_end/testcases/regress/issue_35260.dart.strong.expect
index 25f0614..d65aef7 100644
--- a/pkg/front_end/testcases/regress/issue_35260.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_35260.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35260.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = X;
@@ -10,14 +12,7 @@
 // pkg/front_end/testcases/regress/issue_35260.dart:15:13: Error: Can't use 'Supertype' because it is declared more than once.
 //   X x = new Supertype();
 //             ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35260.dart:7:11: Error: 'Supertype' is already declared in this scope.
-//   factory Supertype() = X;
-//           ^^^^^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35260.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_35260.dart.strong.transformed.expect
index 42e3f3a..bedcb24 100644
--- a/pkg/front_end/testcases/regress/issue_35260.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35260.dart.strong.transformed.expect
@@ -1,10 +1,18 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35260.dart:7:11: Error: 'Supertype' is already declared in this scope.
 //   factory Supertype() = X;
 //           ^^^^^^^^^
-
-library;
+// pkg/front_end/testcases/regress/issue_35260.dart:6:11: Context: Previous declaration of 'Supertype'.
+//   factory Supertype() = X;
+//           ^^^^^^^^^
+//
+// pkg/front_end/testcases/regress/issue_35260.dart:15:13: Error: Can't use 'Supertype' because it is declared more than once.
+//   X x = new Supertype();
+//             ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35266.dart.legacy.expect b/pkg/front_end/testcases/regress/issue_35266.dart.legacy.expect
index aba6888..7821553 100644
--- a/pkg/front_end/testcases/regress/issue_35266.dart.legacy.expect
+++ b/pkg/front_end/testcases/regress/issue_35266.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35266.dart:8:11: Error: 'B.foo' is already declared in this scope.
 //   factory B.foo() = B<T>;
@@ -14,18 +16,7 @@
 // pkg/front_end/testcases/regress/issue_35266.dart:13:11: Warning: Method not found: 'B.foo'.
 //   factory C.bar() = B<K>.foo;
 //           ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35266.dart:8:11: Error: 'B.foo' is already declared in this scope.
-//   factory B.foo() = B<T>;
-//           ^^^^^
-//
-// pkg/front_end/testcases/regress/issue_35266.dart:13:11: Error: Can't use 'B.foo' because it is declared more than once.
-//   factory C.bar() = B<K>.foo;
-//           ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35266.dart.legacy.transformed.expect b/pkg/front_end/testcases/regress/issue_35266.dart.legacy.transformed.expect
index 65c513f..7821553 100644
--- a/pkg/front_end/testcases/regress/issue_35266.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35266.dart.legacy.transformed.expect
@@ -1,14 +1,22 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35266.dart:8:11: Error: 'B.foo' is already declared in this scope.
 //   factory B.foo() = B<T>;
 //           ^^^^^
+// pkg/front_end/testcases/regress/issue_35266.dart:7:11: Context: Previous declaration of 'B.foo'.
+//   factory B.foo() = B<T>;
+//           ^^^^^
 //
 // pkg/front_end/testcases/regress/issue_35266.dart:13:11: Error: Can't use 'B.foo' because it is declared more than once.
 //   factory C.bar() = B<K>.foo;
 //           ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_35266.dart:13:11: Warning: Method not found: 'B.foo'.
+//   factory C.bar() = B<K>.foo;
+//           ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35266.dart.outline.expect b/pkg/front_end/testcases/regress/issue_35266.dart.outline.expect
index c7faea7..1ea14fd 100644
--- a/pkg/front_end/testcases/regress/issue_35266.dart.outline.expect
+++ b/pkg/front_end/testcases/regress/issue_35266.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35266.dart:8:11: Error: 'B.foo' is already declared in this scope.
 //   factory B.foo() = B<T>;
@@ -10,8 +12,7 @@
 // pkg/front_end/testcases/regress/issue_35266.dart:13:11: Error: Can't use 'B.foo' because it is declared more than once.
 //   factory C.bar() = B<K>.foo;
 //           ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35266.dart.strong.expect b/pkg/front_end/testcases/regress/issue_35266.dart.strong.expect
index 7ae1045..edf8e9a 100644
--- a/pkg/front_end/testcases/regress/issue_35266.dart.strong.expect
+++ b/pkg/front_end/testcases/regress/issue_35266.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35266.dart:8:11: Error: 'B.foo' is already declared in this scope.
 //   factory B.foo() = B<T>;
@@ -14,18 +16,7 @@
 // pkg/front_end/testcases/regress/issue_35266.dart:13:11: Error: Method not found: 'B.foo'.
 //   factory C.bar() = B<K>.foo;
 //           ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/regress/issue_35266.dart:8:11: Error: 'B.foo' is already declared in this scope.
-//   factory B.foo() = B<T>;
-//           ^^^^^
-//
-// pkg/front_end/testcases/regress/issue_35266.dart:13:11: Error: Can't use 'B.foo' because it is declared more than once.
-//   factory C.bar() = B<K>.foo;
-//           ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/regress/issue_35266.dart.strong.transformed.expect b/pkg/front_end/testcases/regress/issue_35266.dart.strong.transformed.expect
index dbe98fd..82b4544 100644
--- a/pkg/front_end/testcases/regress/issue_35266.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_35266.dart.strong.transformed.expect
@@ -1,14 +1,22 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/regress/issue_35266.dart:8:11: Error: 'B.foo' is already declared in this scope.
 //   factory B.foo() = B<T>;
 //           ^^^^^
+// pkg/front_end/testcases/regress/issue_35266.dart:7:11: Context: Previous declaration of 'B.foo'.
+//   factory B.foo() = B<T>;
+//           ^^^^^
 //
 // pkg/front_end/testcases/regress/issue_35266.dart:13:11: Error: Can't use 'B.foo' because it is declared more than once.
 //   factory C.bar() = B<K>.foo;
 //           ^
-
-library;
+//
+// pkg/front_end/testcases/regress/issue_35266.dart:13:11: Error: Method not found: 'B.foo'.
+//   factory C.bar() = B<K>.foo;
+//           ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart.strong.expect b/pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart.strong.expect
index f7c017d..5cbc6bf 100644
--- a/pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart.strong.expect
+++ b/pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart.strong.expect
@@ -1,16 +1,11 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart:8:12: Error: Type variables can't have generic function types in their bounds.
-// class Hest<TypeX extends TypeY Function<TypeY>(TypeY)> {}
-//            ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart:8:12: Error: Type variables can't have generic function types in their bounds.
-// class Hest<TypeX extends TypeY Function<TypeY>(TypeY)> {}
-//            ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart:8:12: Error: Type variables can't have generic function types in their bounds.
+// class Hest<TypeX extends TypeY Function<TypeY>(TypeY)> {}
+//            ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart.strong.transformed.expect b/pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart.strong.transformed.expect
index be82e20..5cbc6bf 100644
--- a/pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart.strong.transformed.expect
@@ -1,10 +1,11 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/reject_generic_function_types_in_bounds.dart:8:12: Error: Type variables can't have generic function types in their bounds.
 // class Hest<TypeX extends TypeY Function<TypeY>(TypeY)> {}
 //            ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart.strong.expect b/pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart.strong.expect
index ab8ad33..4b7f896 100644
--- a/pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart.strong.expect
+++ b/pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart:11:15: Error: The argument type 'double' can't be assigned to the parameter type 'U'.
 // Try changing the type of the parameter, or casting the argument to 'U'.
@@ -10,16 +12,7 @@
 // Try changing type arguments so that they conform to the bounds.
 //   new C<int>().g1<num>();
 //                ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart:20:16: Error: Type argument 'num' doesn't conform to the bound 'int' of the type variable 'U' on 'C<int>.g1'.
-//  - 'C' is from 'pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart'.
-// Try changing type arguments so that they conform to the bounds.
-//   new C<int>().g1<num>();
-//                ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart.strong.transformed.expect b/pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart.strong.transformed.expect
index fd9ec58..4b7f896 100644
--- a/pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart.strong.transformed.expect
@@ -1,12 +1,18 @@
-// Unhandled errors:
+library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart:11:15: Error: The argument type 'double' can't be assigned to the parameter type 'U'.
+// Try changing the type of the parameter, or casting the argument to 'U'.
+//     this.f<U>(1.5);
+//               ^
 //
 // pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart:20:16: Error: Type argument 'num' doesn't conform to the bound 'int' of the type variable 'U' on 'C<int>.g1'.
 //  - 'C' is from 'pkg/front_end/testcases/runtime_checks/covariant_generic_method_type_parameter.dart'.
 // Try changing type arguments so that they conform to the bounds.
 //   new C<int>().g1<num>();
 //                ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart.strong.expect b/pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart.strong.expect
index d811656..4e19f32 100644
--- a/pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart.strong.expect
+++ b/pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart:49:41: Error: A value of type 'num Function(num)' can't be assigned to a variable of type 'int Function(int)'.
 // Try changing the type of the left hand side, or casting the right hand side to 'int Function(int)'.
@@ -9,8 +11,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int Function(int)'.
 //     d.value /*@checkReturn=(num) -> num*/ += 1;
 //                                           ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart.strong.transformed.expect b/pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart.strong.transformed.expect
index 8b14a49..4e19f32 100644
--- a/pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart.strong.transformed.expect
@@ -1,4 +1,17 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart:49:41: Error: A value of type 'num Function(num)' can't be assigned to a variable of type 'int Function(int)'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int Function(int)'.
+//   d.value /*@checkReturn=(num) -> num*/ += 1;
+//                                         ^
+//
+// pkg/front_end/testcases/runtime_checks_new/contravariant_generic_return_with_compound_assign_implicit_downcast.dart:53:43: Error: A value of type 'num Function(num)' can't be assigned to a variable of type 'int Function(int)'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int Function(int)'.
+//     d.value /*@checkReturn=(num) -> num*/ += 1;
+//                                           ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart.strong.expect b/pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart.strong.expect
index 1cba00a..8b146df 100644
--- a/pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart.strong.expect
+++ b/pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart:20:49: Error: A value of type 'B<num>' can't be assigned to a variable of type 'B<void Function(num)>'.
 //  - 'B' is from 'pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart'.
@@ -23,8 +25,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'B<void Function(num)>'.
 //   var z = c. /*@checkReturn=B<(num) -> void>*/ x ??= new B<num>();
 //                                                          ^
-
-library test;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart.strong.transformed.expect b/pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart.strong.transformed.expect
index b7a05a6..4f445ca 100644
--- a/pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart.strong.transformed.expect
@@ -1,4 +1,31 @@
 library test;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart:20:49: Error: A value of type 'B<num>' can't be assigned to a variable of type 'B<void Function(num)>'.
+//  - 'B' is from 'pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'B<void Function(num)>'.
+//   c. /*@checkReturn=B<(num) -> void>*/ x += new B<num>();
+//                                                 ^
+//
+// pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart:21:57: Error: A value of type 'B<num>' can't be assigned to a variable of type 'B<void Function(num)>'.
+//  - 'B' is from 'pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'B<void Function(num)>'.
+//   var y = c. /*@checkReturn=B<(num) -> void>*/ x += new B<num>();
+//                                                         ^
+//
+// pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart:22:50: Error: A value of type 'B<num>' can't be assigned to a variable of type 'B<void Function(num)>'.
+//  - 'B' is from 'pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'B<void Function(num)>'.
+//   c. /*@checkReturn=B<(num) -> void>*/ x ??= new B<num>();
+//                                                  ^
+//
+// pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart:23:58: Error: A value of type 'B<num>' can't be assigned to a variable of type 'B<void Function(num)>'.
+//  - 'B' is from 'pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart'.
+// Try changing the type of the left hand side, or casting the right hand side to 'B<void Function(num)>'.
+//   var z = c. /*@checkReturn=B<(num) -> void>*/ x ??= new B<num>();
+//                                                          ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_field.dart.strong.expect b/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_field.dart.strong.expect
index 70f2971..61b9f49 100644
--- a/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_field.dart.strong.expect
+++ b/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_field.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_field.dart:48:7: Error: The return type of the method 'M.y' is 'int', which does not match the return type of the overridden method, 'Object'.
 //  - 'Object' is from 'dart:core'.
@@ -11,16 +13,7 @@
 // pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_field.dart:54:5: Context: Override was introduced in the mixin application class 'C'.
 //     C = B with M implements I<int>;
 //     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_field.dart:48:7: Error: The return type of the method 'M.y' is 'int', which does not match the return type of the overridden method, 'Object'.
-//  - 'Object' is from 'dart:core'.
-// Change to a subtype of 'Object'.
-//   int y;
-//       ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_getter.dart.strong.expect b/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_getter.dart.strong.expect
index 45084df..b92f411 100644
--- a/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_getter.dart.strong.expect
+++ b/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_getter.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_getter.dart:39:9: Error: The return type of the method 'M.x' is 'void Function(T)', which does not match the return type of the overridden method, 'void Function(int)'.
 // Change to a subtype of 'void Function(int)'.
@@ -10,15 +12,7 @@
 // pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_getter.dart:47:16: Context: Override was introduced in the mixin application class 'C'.
 // abstract class C<T> = B with M<F<T>> implements I<T>;
 //                ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_getter.dart:39:9: Error: The return type of the method 'M.x' is 'void Function(T)', which does not match the return type of the overridden method, 'void Function(int)'.
-// Change to a subtype of 'void Function(int)'.
-//   T get x => f();
-//         ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_setter.dart.strong.expect b/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_setter.dart.strong.expect
index 92e6517..47119ca 100644
--- a/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_setter.dart.strong.expect
+++ b/pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_setter.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library test;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_setter.dart:53:18: Error: The parameter 'value' of the method 'M.y' has type 'int', which does not match the corresponding type in the overridden method, 'Object'.
 //  - 'Object' is from 'dart:core'.
@@ -11,16 +13,7 @@
 // pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_setter.dart:61:5: Context: Override was introduced in the mixin application class 'C'.
 //     C = B with M implements I<int>;
 //     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/runtime_checks_new/mixin_forwarding_stub_setter.dart:53:18: Error: The parameter 'value' of the method 'M.y' has type 'int', which does not match the corresponding type in the overridden method, 'Object'.
-//  - 'Object' is from 'dart:core'.
-// Change to a supertype of 'Object', or, for a covariant parameter, a subtype.
-//   void set y(int value) {
-//                  ^
-
-library test;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/set_literals/disambiguation_rule.dart.strong.expect b/pkg/front_end/testcases/set_literals/disambiguation_rule.dart.strong.expect
index e5e3a65..c139a48 100644
--- a/pkg/front_end/testcases/set_literals/disambiguation_rule.dart.strong.expect
+++ b/pkg/front_end/testcases/set_literals/disambiguation_rule.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/set_literals/disambiguation_rule.dart:14:34: Error: The map literal type 'Map<dynamic, dynamic>' isn't of expected type 'LinkedHashMap<int, bool>'.
 //  - 'Map' is from 'dart:core'.
@@ -29,8 +31,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'FutureOr<LinkedHashMap<int, bool>>'.
 // FutureOr<LinkedHashMap<int, bool>> lhmfun2() => {};
 //                                                 ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:collection" as col;
diff --git a/pkg/front_end/testcases/set_literals/disambiguation_rule.dart.strong.transformed.expect b/pkg/front_end/testcases/set_literals/disambiguation_rule.dart.strong.transformed.expect
index 9b60cf8..02f99b6 100644
--- a/pkg/front_end/testcases/set_literals/disambiguation_rule.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/set_literals/disambiguation_rule.dart.strong.transformed.expect
@@ -1,4 +1,37 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/set_literals/disambiguation_rule.dart:14:34: Error: The map literal type 'Map<dynamic, dynamic>' isn't of expected type 'LinkedHashMap<int, bool>'.
+//  - 'Map' is from 'dart:core'.
+//  - 'LinkedHashMap' is from 'dart:collection'.
+// Change the type of the map literal or the context in which it is used.
+//   LinkedHashMap<int, bool> lhm = {};
+//                                  ^
+//
+// pkg/front_end/testcases/set_literals/disambiguation_rule.dart:33:52: Error: The map literal type 'Map<dynamic, dynamic>' isn't of expected type 'LinkedHashMap<int, bool>'.
+//  - 'Map' is from 'dart:core'.
+//  - 'LinkedHashMap' is from 'dart:collection'.
+// Change the type of the map literal or the context in which it is used.
+// Future<LinkedHashMap<int, bool>> lhmfun() async => {};
+//                                                    ^
+//
+// pkg/front_end/testcases/set_literals/disambiguation_rule.dart:38:43: Error: A value of type 'Set<dynamic>' can't be assigned to a variable of type 'FutureOr<LinkedHashSet<int>>'.
+//  - 'Set' is from 'dart:core'.
+//  - 'FutureOr' is from 'dart:async'.
+//  - 'LinkedHashSet' is from 'dart:collection'.
+// Try changing the type of the left hand side, or casting the right hand side to 'FutureOr<LinkedHashSet<int>>'.
+// FutureOr<LinkedHashSet<int>> lhsfun2() => {};
+//                                           ^
+//
+// pkg/front_end/testcases/set_literals/disambiguation_rule.dart:39:49: Error: A value of type 'Map<dynamic, dynamic>' can't be assigned to a variable of type 'FutureOr<LinkedHashMap<int, bool>>'.
+//  - 'Map' is from 'dart:core'.
+//  - 'FutureOr' is from 'dart:async'.
+//  - 'LinkedHashMap' is from 'dart:collection'.
+// Try changing the type of the left hand side, or casting the right hand side to 'FutureOr<LinkedHashMap<int, bool>>'.
+// FutureOr<LinkedHashMap<int, bool>> lhmfun2() => {};
+//                                                 ^
+//
 import self as self;
 import "dart:async" as asy;
 import "dart:core" as core;
diff --git a/pkg/front_end/testcases/spread_collection.dart.legacy.expect b/pkg/front_end/testcases/spread_collection.dart.legacy.expect
index cb8f921..2fa8e1a 100644
--- a/pkg/front_end/testcases/spread_collection.dart.legacy.expect
+++ b/pkg/front_end/testcases/spread_collection.dart.legacy.expect
@@ -1,24 +1,15 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/spread_collection.dart:6:25: Error: Unexpected token '...'.
-//   final list = <int>[1, ...[2], ...?[3]];
-//                         ^^^
-//
-// pkg/front_end/testcases/spread_collection.dart:6:33: Error: Unexpected token '...?'.
-//   final list = <int>[1, ...[2], ...?[3]];
-//                                 ^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/spread_collection.dart:6:25: Error: Unexpected token '...'.
-//   final list = <int>[1, ...[2], ...?[3]];
-//                         ^^^
-//
-// pkg/front_end/testcases/spread_collection.dart:6:33: Error: Unexpected token '...?'.
-//   final list = <int>[1, ...[2], ...?[3]];
-//                                 ^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/spread_collection.dart:6:25: Error: Unexpected token '...'.
+//   final list = <int>[1, ...[2], ...?[3]];
+//                         ^^^
+//
+// pkg/front_end/testcases/spread_collection.dart:6:33: Error: Unexpected token '...?'.
+//   final list = <int>[1, ...[2], ...?[3]];
+//                                 ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/spread_collection.dart.legacy.transformed.expect b/pkg/front_end/testcases/spread_collection.dart.legacy.transformed.expect
index f75eb71..2fa8e1a 100644
--- a/pkg/front_end/testcases/spread_collection.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/spread_collection.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/spread_collection.dart:6:25: Error: Unexpected token '...'.
 //   final list = <int>[1, ...[2], ...?[3]];
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/spread_collection.dart:6:33: Error: Unexpected token '...?'.
 //   final list = <int>[1, ...[2], ...?[3]];
 //                                 ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/spread_collection.dart.strong.expect b/pkg/front_end/testcases/spread_collection.dart.strong.expect
index 6ad26bd..37aeea3 100644
--- a/pkg/front_end/testcases/spread_collection.dart.strong.expect
+++ b/pkg/front_end/testcases/spread_collection.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/spread_collection.dart:6:25: Error: Unexpected token '...'.
 //   final list = <int>[1, ...[2], ...?[3]];
@@ -19,18 +21,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'int'.
 //   final list = <int>[1, ...[2], ...?[3]];
 //                                     ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/spread_collection.dart:6:25: Error: Unexpected token '...'.
-//   final list = <int>[1, ...[2], ...?[3]];
-//                         ^^^
-//
-// pkg/front_end/testcases/spread_collection.dart:6:33: Error: Unexpected token '...?'.
-//   final list = <int>[1, ...[2], ...?[3]];
-//                                 ^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/spread_collection.dart.strong.transformed.expect b/pkg/front_end/testcases/spread_collection.dart.strong.transformed.expect
index fcd1b20..37aeea3 100644
--- a/pkg/front_end/testcases/spread_collection.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/spread_collection.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/spread_collection.dart:6:25: Error: Unexpected token '...'.
 //   final list = <int>[1, ...[2], ...?[3]];
@@ -7,8 +9,19 @@
 // pkg/front_end/testcases/spread_collection.dart:6:33: Error: Unexpected token '...?'.
 //   final list = <int>[1, ...[2], ...?[3]];
 //                                 ^^^^
-
-library;
+//
+// pkg/front_end/testcases/spread_collection.dart:6:28: Error: A value of type 'List<int>' can't be assigned to a variable of type 'int'.
+//  - 'List' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   final list = <int>[1, ...[2], ...?[3]];
+//                            ^
+//
+// pkg/front_end/testcases/spread_collection.dart:6:37: Error: A value of type 'List<int>' can't be assigned to a variable of type 'int'.
+//  - 'List' is from 'dart:core'.
+// Try changing the type of the left hand side, or casting the right hand side to 'int'.
+//   final list = <int>[1, ...[2], ...?[3]];
+//                                     ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/statements.dart.legacy.expect b/pkg/front_end/testcases/statements.dart.legacy.expect
index 533d647..412bb2d 100644
--- a/pkg/front_end/testcases/statements.dart.legacy.expect
+++ b/pkg/front_end/testcases/statements.dart.legacy.expect
@@ -1,24 +1,15 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/statements.dart:15:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
-//     yield x;
-//     ^^^^^
-//
-// pkg/front_end/testcases/statements.dart:16:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
-//     yield* x;
-//     ^^^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/statements.dart:15:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
-//     yield x;
-//     ^^^^^
-//
-// pkg/front_end/testcases/statements.dart:16:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
-//     yield* x;
-//     ^^^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/statements.dart:15:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
+//     yield x;
+//     ^^^^^
+//
+// pkg/front_end/testcases/statements.dart:16:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
+//     yield* x;
+//     ^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/statements.dart.legacy.transformed.expect b/pkg/front_end/testcases/statements.dart.legacy.transformed.expect
index 2cc8929..606cb49 100644
--- a/pkg/front_end/testcases/statements.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/statements.dart.legacy.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/statements.dart:15:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
 //     yield x;
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/statements.dart:16:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
 //     yield* x;
 //     ^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/statements.dart.strong.expect b/pkg/front_end/testcases/statements.dart.strong.expect
index 8a35aa2..e8366ee 100644
--- a/pkg/front_end/testcases/statements.dart.strong.expect
+++ b/pkg/front_end/testcases/statements.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/statements.dart:15:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
 //     yield x;
@@ -13,18 +15,7 @@
 //  - 'Stream' is from 'dart:async'.
 //   await for (var x in []) {
 //                       ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/statements.dart:15:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
-//     yield x;
-//     ^^^^^
-//
-// pkg/front_end/testcases/statements.dart:16:5: Error: 'yield' can only be used in 'sync*' or 'async*' methods.
-//     yield* x;
-//     ^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 import "dart:async" as asy;
diff --git a/pkg/front_end/testcases/super_call.dart.legacy.expect b/pkg/front_end/testcases/super_call.dart.legacy.expect
index 0928d4f..4e4dd69 100644
--- a/pkg/front_end/testcases/super_call.dart.legacy.expect
+++ b/pkg/front_end/testcases/super_call.dart.legacy.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/super_call.dart:14:12: Error: Can't use 'super' as an expression.
 // To delegate a constructor to a super constructor, put the super call as an initializer.
 //     return super(5);
 //            ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/super_call.dart.legacy.transformed.expect b/pkg/front_end/testcases/super_call.dart.legacy.transformed.expect
index e58a60b..4e4dd69 100644
--- a/pkg/front_end/testcases/super_call.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/super_call.dart.legacy.transformed.expect
@@ -1,4 +1,12 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/super_call.dart:14:12: Error: Can't use 'super' as an expression.
+// To delegate a constructor to a super constructor, put the super call as an initializer.
+//     return super(5);
+//            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/super_call.dart.strong.expect b/pkg/front_end/testcases/super_call.dart.strong.expect
index bc4395d..3342243 100644
--- a/pkg/front_end/testcases/super_call.dart.strong.expect
+++ b/pkg/front_end/testcases/super_call.dart.strong.expect
@@ -1,11 +1,12 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/super_call.dart:14:12: Error: Can't use 'super' as an expression.
 // To delegate a constructor to a super constructor, put the super call as an initializer.
 //     return super(5);
 //            ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/super_call.dart.strong.transformed.expect b/pkg/front_end/testcases/super_call.dart.strong.transformed.expect
index 0d474d7..3342243 100644
--- a/pkg/front_end/testcases/super_call.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/super_call.dart.strong.transformed.expect
@@ -1,4 +1,12 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/super_call.dart:14:12: Error: Can't use 'super' as an expression.
+// To delegate a constructor to a super constructor, put the super call as an initializer.
+//     return super(5);
+//            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/tabs.dart.legacy.expect b/pkg/front_end/testcases/tabs.dart.legacy.expect
index a304f47..7397272 100644
--- a/pkg/front_end/testcases/tabs.dart.legacy.expect
+++ b/pkg/front_end/testcases/tabs.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/tabs.dart:9:8: Warning: Getter not found: 'one'.
 // 	print(one);
@@ -19,8 +21,7 @@
 // pkg/front_end/testcases/tabs.dart:13:14: Warning: Getter not found: 'five'.
 // 	   	  print(five);
 // 	   	        ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/tabs.dart.legacy.transformed.expect b/pkg/front_end/testcases/tabs.dart.legacy.transformed.expect
index b542e17..7397272 100644
--- a/pkg/front_end/testcases/tabs.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/tabs.dart.legacy.transformed.expect
@@ -1,4 +1,27 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/tabs.dart:9:8: Warning: Getter not found: 'one'.
+// 	print(one);
+// 	      ^^^
+//
+// pkg/front_end/testcases/tabs.dart:10:9: Warning: Getter not found: 'two'.
+// 		print(two);
+// 		      ^^^
+//
+// pkg/front_end/testcases/tabs.dart:11:11: Warning: Getter not found: 'three'.
+// 		  print(three);
+// 		        ^^^^^
+//
+// pkg/front_end/testcases/tabs.dart:12:12: Warning: Getter not found: 'four'.
+// 	   	print(four);
+// 	   	      ^^^^
+//
+// pkg/front_end/testcases/tabs.dart:13:14: Warning: Getter not found: 'five'.
+// 	   	  print(five);
+// 	   	        ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/tabs.dart.strong.expect b/pkg/front_end/testcases/tabs.dart.strong.expect
index 55b8efd..d8b5c84 100644
--- a/pkg/front_end/testcases/tabs.dart.strong.expect
+++ b/pkg/front_end/testcases/tabs.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/tabs.dart:9:8: Error: Getter not found: 'one'.
 // 	print(one);
@@ -19,8 +21,7 @@
 // pkg/front_end/testcases/tabs.dart:13:14: Error: Getter not found: 'five'.
 // 	   	  print(five);
 // 	   	        ^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/tabs.dart.strong.transformed.expect b/pkg/front_end/testcases/tabs.dart.strong.transformed.expect
index 3028e07..d8b5c84 100644
--- a/pkg/front_end/testcases/tabs.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/tabs.dart.strong.transformed.expect
@@ -1,4 +1,27 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/tabs.dart:9:8: Error: Getter not found: 'one'.
+// 	print(one);
+// 	      ^^^
+//
+// pkg/front_end/testcases/tabs.dart:10:9: Error: Getter not found: 'two'.
+// 		print(two);
+// 		      ^^^
+//
+// pkg/front_end/testcases/tabs.dart:11:11: Error: Getter not found: 'three'.
+// 		  print(three);
+// 		        ^^^^^
+//
+// pkg/front_end/testcases/tabs.dart:12:12: Error: Getter not found: 'four'.
+// 	   	print(four);
+// 	   	      ^^^^
+//
+// pkg/front_end/testcases/tabs.dart:13:14: Error: Getter not found: 'five'.
+// 	   	  print(five);
+// 	   	        ^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_as_super.dart.outline.expect b/pkg/front_end/testcases/type_variable_as_super.dart.outline.expect
index fc52e8d..9b48c25 100644
--- a/pkg/front_end/testcases/type_variable_as_super.dart.outline.expect
+++ b/pkg/front_end/testcases/type_variable_as_super.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/type_variable_as_super.dart:5:16: Error: The type variable 'T' can't be used as supertype.
 // abstract class A<T> extends T {}
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/type_variable_as_super.dart:11:7: Error: The type variable 'T' can't be used as supertype.
 // class C<T> extends T {}
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_as_super.dart.strong.expect b/pkg/front_end/testcases/type_variable_as_super.dart.strong.expect
index 965f277..37ea872 100644
--- a/pkg/front_end/testcases/type_variable_as_super.dart.strong.expect
+++ b/pkg/front_end/testcases/type_variable_as_super.dart.strong.expect
@@ -1,48 +1,27 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:5:16: Error: The type variable 'T' can't be used as supertype.
-// abstract class A<T> extends T {}
-//                ^
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:7:16: Error: The type variable 'T' can't be used as supertype.
-// abstract class B<T> extends T {
-//                ^
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:11:7: Error: The type variable 'T' can't be used as supertype.
-// class C<T> extends T {}
-//       ^
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:14:7: Error: The class 'A' is abstract and can't be instantiated.
-//   new A();
-//       ^
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:15:7: Error: The class 'B' is abstract and can't be instantiated.
-//   new B();
-//       ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:5:16: Error: The type variable 'T' can't be used as supertype.
-// abstract class A<T> extends T {}
-//                ^
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:7:16: Error: The type variable 'T' can't be used as supertype.
-// abstract class B<T> extends T {
-//                ^
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:11:7: Error: The type variable 'T' can't be used as supertype.
-// class C<T> extends T {}
-//       ^
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:14:7: Error: The class 'A' is abstract and can't be instantiated.
-//   new A();
-//       ^
-//
-// pkg/front_end/testcases/type_variable_as_super.dart:15:7: Error: The class 'B' is abstract and can't be instantiated.
-//   new B();
-//       ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/type_variable_as_super.dart:5:16: Error: The type variable 'T' can't be used as supertype.
+// abstract class A<T> extends T {}
+//                ^
+//
+// pkg/front_end/testcases/type_variable_as_super.dart:7:16: Error: The type variable 'T' can't be used as supertype.
+// abstract class B<T> extends T {
+//                ^
+//
+// pkg/front_end/testcases/type_variable_as_super.dart:11:7: Error: The type variable 'T' can't be used as supertype.
+// class C<T> extends T {}
+//       ^
+//
+// pkg/front_end/testcases/type_variable_as_super.dart:14:7: Error: The class 'A' is abstract and can't be instantiated.
+//   new A();
+//       ^
+//
+// pkg/front_end/testcases/type_variable_as_super.dart:15:7: Error: The class 'B' is abstract and can't be instantiated.
+//   new B();
+//       ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_as_super.dart.strong.transformed.expect b/pkg/front_end/testcases/type_variable_as_super.dart.strong.transformed.expect
index d58011a..37ea872 100644
--- a/pkg/front_end/testcases/type_variable_as_super.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/type_variable_as_super.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/type_variable_as_super.dart:5:16: Error: The type variable 'T' can't be used as supertype.
 // abstract class A<T> extends T {}
@@ -19,8 +21,7 @@
 // pkg/front_end/testcases/type_variable_as_super.dart:15:7: Error: The class 'B' is abstract and can't be instantiated.
 //   new B();
 //       ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_prefix.dart.legacy.expect b/pkg/front_end/testcases/type_variable_prefix.dart.legacy.expect
index 89d4f6a..dbd5159a 100644
--- a/pkg/front_end/testcases/type_variable_prefix.dart.legacy.expect
+++ b/pkg/front_end/testcases/type_variable_prefix.dart.legacy.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/type_variable_prefix.dart:8:3: Warning: 'T.String' can't be used as a type because 'T' doesn't refer to an import prefix.
 //   T.String method() => "Hello, World!";
 //   ^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_prefix.dart.legacy.transformed.expect b/pkg/front_end/testcases/type_variable_prefix.dart.legacy.transformed.expect
index 91a6346..dbd5159a 100644
--- a/pkg/front_end/testcases/type_variable_prefix.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/type_variable_prefix.dart.legacy.transformed.expect
@@ -1,4 +1,11 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/type_variable_prefix.dart:8:3: Warning: 'T.String' can't be used as a type because 'T' doesn't refer to an import prefix.
+//   T.String method() => "Hello, World!";
+//   ^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_prefix.dart.outline.expect b/pkg/front_end/testcases/type_variable_prefix.dart.outline.expect
index 9680b15..9fa3e61 100644
--- a/pkg/front_end/testcases/type_variable_prefix.dart.outline.expect
+++ b/pkg/front_end/testcases/type_variable_prefix.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/type_variable_prefix.dart:8:3: Warning: 'T.String' can't be used as a type because 'T' doesn't refer to an import prefix.
 //   T.String method() => "Hello, World!";
 //   ^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_prefix.dart.strong.expect b/pkg/front_end/testcases/type_variable_prefix.dart.strong.expect
index af040d1..a4ca447 100644
--- a/pkg/front_end/testcases/type_variable_prefix.dart.strong.expect
+++ b/pkg/front_end/testcases/type_variable_prefix.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/type_variable_prefix.dart:8:3: Error: 'T.String' can't be used as a type because 'T' doesn't refer to an import prefix.
 //   T.String method() => "Hello, World!";
@@ -13,14 +15,7 @@
 // Try changing the type of the left hand side, or casting the right hand side to 'String'.
 //   T.String s = new C().method();
 //                        ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/type_variable_prefix.dart:8:3: Error: 'T.String' can't be used as a type because 'T' doesn't refer to an import prefix.
-//   T.String method() => "Hello, World!";
-//   ^^^^^^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_prefix.dart.strong.transformed.expect b/pkg/front_end/testcases/type_variable_prefix.dart.strong.transformed.expect
index 01b57d3..a4ca447 100644
--- a/pkg/front_end/testcases/type_variable_prefix.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/type_variable_prefix.dart.strong.transformed.expect
@@ -1,10 +1,21 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/type_variable_prefix.dart:8:3: Error: 'T.String' can't be used as a type because 'T' doesn't refer to an import prefix.
 //   T.String method() => "Hello, World!";
 //   ^^^^^^^^
-
-library;
+//
+// pkg/front_end/testcases/type_variable_prefix.dart:8:24: Error: A value of type 'String' can't be assigned to a variable of type 'invalid-type'.
+// Try changing the type of the left hand side, or casting the right hand side to 'invalid-type'.
+//   T.String method() => "Hello, World!";
+//                        ^
+//
+// pkg/front_end/testcases/type_variable_prefix.dart:12:24: Error: A value of type 'invalid-type' can't be assigned to a variable of type 'String'.
+// Try changing the type of the left hand side, or casting the right hand side to 'String'.
+//   T.String s = new C().method();
+//                        ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_uses.dart.legacy.expect b/pkg/front_end/testcases/type_variable_uses.dart.legacy.expect
index eeed9e1..57ef641 100644
--- a/pkg/front_end/testcases/type_variable_uses.dart.legacy.expect
+++ b/pkg/front_end/testcases/type_variable_uses.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/type_variable_uses.dart:7:15: Warning: Can only use type variables in instance methods.
 //   static C<T> staticMethod() {
@@ -59,30 +61,7 @@
 // pkg/front_end/testcases/type_variable_uses.dart:28:28: Error: Type variables can't be used as constants.
 //     const <Object>[const C<T>()];
 //                            ^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/type_variable_uses.dart:24:13: Error: Type variables can't be used as constants.
-//     const C<T>();
-//             ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:25:12: Error: Type variables can't be used as constants.
-//     const <T>[];
-//            ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:26:14: Error: Type variables can't be used as constants.
-//     const <C<T>>[];
-//              ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:27:20: Error: Type variables can't be used as constants.
-//     const <Object>[T];
-//                    ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:28:28: Error: Type variables can't be used as constants.
-//     const <Object>[const C<T>()];
-//                            ^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_uses.dart.legacy.transformed.expect b/pkg/front_end/testcases/type_variable_uses.dart.legacy.transformed.expect
index ab55341..57ef641 100644
--- a/pkg/front_end/testcases/type_variable_uses.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/type_variable_uses.dart.legacy.transformed.expect
@@ -1,4 +1,46 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/type_variable_uses.dart:7:15: Warning: Can only use type variables in instance methods.
+//   static C<T> staticMethod() {
+//               ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:8:11: Warning: Type variables can't be used in static members.
+//     print(T);
+//           ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:9:5: Warning: Type variables can't be used in static members.
+//     T t;
+//     ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:10:7: Warning: Type variables can't be used in static members.
+//     C<T> l;
+//       ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:11:9: Warning: Type variables can't be used in static members.
+//     C<C<T>> ll;
+//         ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:12:13: Warning: Type variables can't be used in static members.
+//     const C<T>();
+//             ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:13:12: Warning: Type variables can't be used in static members.
+//     const <T>[];
+//            ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:14:14: Warning: Type variables can't be used in static members.
+//     const <C<T>>[];
+//              ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:15:20: Warning: Type variables can't be used in static members.
+//     const <Object>[T];
+//                    ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:16:28: Warning: Type variables can't be used in static members.
+//     const <Object>[const C<T>()];
+//                            ^
 //
 // pkg/front_end/testcases/type_variable_uses.dart:24:13: Error: Type variables can't be used as constants.
 //     const C<T>();
@@ -19,8 +61,7 @@
 // pkg/front_end/testcases/type_variable_uses.dart:28:28: Error: Type variables can't be used as constants.
 //     const <Object>[const C<T>()];
 //                            ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_uses.dart.outline.expect b/pkg/front_end/testcases/type_variable_uses.dart.outline.expect
index 57300d4..3843eac 100644
--- a/pkg/front_end/testcases/type_variable_uses.dart.outline.expect
+++ b/pkg/front_end/testcases/type_variable_uses.dart.outline.expect
@@ -1,10 +1,11 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/type_variable_uses.dart:7:15: Warning: Can only use type variables in instance methods.
 //   static C<T> staticMethod() {
 //               ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_uses.dart.strong.expect b/pkg/front_end/testcases/type_variable_uses.dart.strong.expect
index a8e6b38..e393464 100644
--- a/pkg/front_end/testcases/type_variable_uses.dart.strong.expect
+++ b/pkg/front_end/testcases/type_variable_uses.dart.strong.expect
@@ -1,128 +1,67 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/type_variable_uses.dart:7:15: Error: Can only use type variables in instance methods.
-//   static C<T> staticMethod() {
-//               ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:8:11: Error: Type variables can't be used in static members.
-//     print(T);
-//           ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:9:5: Error: Type variables can't be used in static members.
-//     T t;
-//     ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:10:7: Error: Type variables can't be used in static members.
-//     C<T> l;
-//       ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:11:9: Error: Type variables can't be used in static members.
-//     C<C<T>> ll;
-//         ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:12:13: Error: Type variables can't be used in static members.
-//     const C<T>();
-//             ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:13:12: Error: Type variables can't be used in static members.
-//     const <T>[];
-//            ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:14:14: Error: Type variables can't be used in static members.
-//     const <C<T>>[];
-//              ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:15:20: Error: Type variables can't be used in static members.
-//     const <Object>[T];
-//                    ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:16:28: Error: Type variables can't be used in static members.
-//     const <Object>[const C<T>()];
-//                            ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:24:13: Error: Type variables can't be used as constants.
-//     const C<T>();
-//             ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:25:12: Error: Type variables can't be used as constants.
-//     const <T>[];
-//            ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:26:14: Error: Type variables can't be used as constants.
-//     const <C<T>>[];
-//              ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:27:20: Error: Type variables can't be used as constants.
-//     const <Object>[T];
-//                    ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:28:28: Error: Type variables can't be used as constants.
-//     const <Object>[const C<T>()];
-//                            ^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/type_variable_uses.dart:7:15: Error: Can only use type variables in instance methods.
-//   static C<T> staticMethod() {
-//               ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:8:11: Error: Type variables can't be used in static members.
-//     print(T);
-//           ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:9:5: Error: Type variables can't be used in static members.
-//     T t;
-//     ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:10:7: Error: Type variables can't be used in static members.
-//     C<T> l;
-//       ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:11:9: Error: Type variables can't be used in static members.
-//     C<C<T>> ll;
-//         ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:12:13: Error: Type variables can't be used in static members.
-//     const C<T>();
-//             ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:13:12: Error: Type variables can't be used in static members.
-//     const <T>[];
-//            ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:14:14: Error: Type variables can't be used in static members.
-//     const <C<T>>[];
-//              ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:15:20: Error: Type variables can't be used in static members.
-//     const <Object>[T];
-//                    ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:16:28: Error: Type variables can't be used in static members.
-//     const <Object>[const C<T>()];
-//                            ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:24:13: Error: Type variables can't be used as constants.
-//     const C<T>();
-//             ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:25:12: Error: Type variables can't be used as constants.
-//     const <T>[];
-//            ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:26:14: Error: Type variables can't be used as constants.
-//     const <C<T>>[];
-//              ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:27:20: Error: Type variables can't be used as constants.
-//     const <Object>[T];
-//                    ^
-//
-// pkg/front_end/testcases/type_variable_uses.dart:28:28: Error: Type variables can't be used as constants.
-//     const <Object>[const C<T>()];
-//                            ^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/type_variable_uses.dart:7:15: Error: Can only use type variables in instance methods.
+//   static C<T> staticMethod() {
+//               ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:8:11: Error: Type variables can't be used in static members.
+//     print(T);
+//           ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:9:5: Error: Type variables can't be used in static members.
+//     T t;
+//     ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:10:7: Error: Type variables can't be used in static members.
+//     C<T> l;
+//       ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:11:9: Error: Type variables can't be used in static members.
+//     C<C<T>> ll;
+//         ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:12:13: Error: Type variables can't be used in static members.
+//     const C<T>();
+//             ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:13:12: Error: Type variables can't be used in static members.
+//     const <T>[];
+//            ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:14:14: Error: Type variables can't be used in static members.
+//     const <C<T>>[];
+//              ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:15:20: Error: Type variables can't be used in static members.
+//     const <Object>[T];
+//                    ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:16:28: Error: Type variables can't be used in static members.
+//     const <Object>[const C<T>()];
+//                            ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:24:13: Error: Type variables can't be used as constants.
+//     const C<T>();
+//             ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:25:12: Error: Type variables can't be used as constants.
+//     const <T>[];
+//            ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:26:14: Error: Type variables can't be used as constants.
+//     const <C<T>>[];
+//              ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:27:20: Error: Type variables can't be used as constants.
+//     const <Object>[T];
+//                    ^
+//
+// pkg/front_end/testcases/type_variable_uses.dart:28:28: Error: Type variables can't be used as constants.
+//     const <Object>[const C<T>()];
+//                            ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/type_variable_uses.dart.strong.transformed.expect b/pkg/front_end/testcases/type_variable_uses.dart.strong.transformed.expect
index 335895d..e393464 100644
--- a/pkg/front_end/testcases/type_variable_uses.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/type_variable_uses.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/type_variable_uses.dart:7:15: Error: Can only use type variables in instance methods.
 //   static C<T> staticMethod() {
@@ -59,8 +61,7 @@
 // pkg/front_end/testcases/type_variable_uses.dart:28:28: Error: Type variables can't be used as constants.
 //     const <Object>[const C<T>()];
 //                            ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/undefined.dart.strong.expect b/pkg/front_end/testcases/undefined.dart.strong.expect
index 4dabf97..3e4911c 100644
--- a/pkg/front_end/testcases/undefined.dart.strong.expect
+++ b/pkg/front_end/testcases/undefined.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/undefined.dart:14:33: Error: The getter 'y' isn't defined for the class 'C'.
 //  - 'C' is from 'pkg/front_end/testcases/undefined.dart'.
@@ -17,8 +19,7 @@
 // Try correcting the name to the name of an existing setter, or defining a setter or field named 'y'.
 //   c. /*@error=UndefinedSetter*/ y = null;
 //                                 ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/undefined.dart.strong.transformed.expect b/pkg/front_end/testcases/undefined.dart.strong.transformed.expect
index 03483b3..c6a122c 100644
--- a/pkg/front_end/testcases/undefined.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/undefined.dart.strong.transformed.expect
@@ -1,4 +1,25 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/undefined.dart:14:33: Error: The getter 'y' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/undefined.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'y'.
+//   c. /*@error=UndefinedGetter*/ y;
+//                                 ^
+//
+// pkg/front_end/testcases/undefined.dart:16:33: Error: The method 'g' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/undefined.dart'.
+// Try correcting the name to the name of an existing method, or defining a method named 'g'.
+//   c. /*@error=UndefinedMethod*/ g();
+//                                 ^
+//
+// pkg/front_end/testcases/undefined.dart:18:33: Error: The setter 'y' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/undefined.dart'.
+// Try correcting the name to the name of an existing setter, or defining a setter or field named 'y'.
+//   c. /*@error=UndefinedSetter*/ y = null;
+//                                 ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart.strong.expect b/pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart.strong.expect
index de383ad..d348c34 100644
--- a/pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart.strong.expect
+++ b/pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart.strong.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart:13:33: Error: The getter 'x' isn't defined for the class 'C'.
 //  - 'C' is from 'pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart'.
@@ -11,8 +13,7 @@
 // Try correcting the name to the name of an existing getter, or defining a getter or field named 'x'.
 //   c. /*@error=UndefinedGetter*/ x ??= 1;
 //                                 ^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart.strong.transformed.expect b/pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart.strong.transformed.expect
index db60632..5b31b46 100644
--- a/pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart.strong.transformed.expect
@@ -1,4 +1,19 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart:13:33: Error: The getter 'x' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'x'.
+//   c. /*@error=UndefinedGetter*/ x += 1;
+//                                 ^
+//
+// pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart:14:33: Error: The getter 'x' isn't defined for the class 'C'.
+//  - 'C' is from 'pkg/front_end/testcases/undefined_getter_in_compound_assignment.dart'.
+// Try correcting the name to the name of an existing getter, or defining a getter or field named 'x'.
+//   c. /*@error=UndefinedGetter*/ x ??= 1;
+//                                 ^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/var_as_type_name.dart.legacy.expect b/pkg/front_end/testcases/var_as_type_name.dart.legacy.expect
index a57cbf9..3807e34 100644
--- a/pkg/front_end/testcases/var_as_type_name.dart.legacy.expect
+++ b/pkg/front_end/testcases/var_as_type_name.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: The keyword 'var' can't be used as a type name.
 //   Map<String, var> m;
@@ -11,14 +13,7 @@
 // pkg/front_end/testcases/var_as_type_name.dart:6:15: Warning: 'var' isn't a type.
 //   Map<String, var> m;
 //               ^^^
-
-// Unhandled errors:
 //
-// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: The keyword 'var' can't be used as a type name.
-//   Map<String, var> m;
-//               ^^^
-
-library;
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/var_as_type_name.dart.legacy.transformed.expect b/pkg/front_end/testcases/var_as_type_name.dart.legacy.transformed.expect
index 0311700..3807e34 100644
--- a/pkg/front_end/testcases/var_as_type_name.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/var_as_type_name.dart.legacy.transformed.expect
@@ -1,10 +1,19 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: The keyword 'var' can't be used as a type name.
 //   Map<String, var> m;
 //               ^^^
-
-library;
+//
+// pkg/front_end/testcases/var_as_type_name.dart:6:15: Warning: Type 'var' not found.
+//   Map<String, var> m;
+//               ^^^
+//
+// pkg/front_end/testcases/var_as_type_name.dart:6:15: Warning: 'var' isn't a type.
+//   Map<String, var> m;
+//               ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/var_as_type_name.dart.outline.expect b/pkg/front_end/testcases/var_as_type_name.dart.outline.expect
index cb7a015..dc6939d 100644
--- a/pkg/front_end/testcases/var_as_type_name.dart.outline.expect
+++ b/pkg/front_end/testcases/var_as_type_name.dart.outline.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: The keyword 'var' can't be used as a type name.
 //   Map<String, var> m;
@@ -7,8 +9,7 @@
 // pkg/front_end/testcases/var_as_type_name.dart:6:15: Warning: Type 'var' not found.
 //   Map<String, var> m;
 //               ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/var_as_type_name.dart.strong.expect b/pkg/front_end/testcases/var_as_type_name.dart.strong.expect
index 0b4ad72..8c534a9 100644
--- a/pkg/front_end/testcases/var_as_type_name.dart.strong.expect
+++ b/pkg/front_end/testcases/var_as_type_name.dart.strong.expect
@@ -1,32 +1,19 @@
-// Formatted problems:
-//
-// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: The keyword 'var' can't be used as a type name.
-//   Map<String, var> m;
-//               ^^^
-//
-// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: Type 'var' not found.
-//   Map<String, var> m;
-//               ^^^
-//
-// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: 'var' isn't a type.
-//   Map<String, var> m;
-//               ^^^
-
-// Unhandled errors:
-//
-// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: The keyword 'var' can't be used as a type name.
-//   Map<String, var> m;
-//               ^^^
-//
-// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: Type 'var' not found.
-//   Map<String, var> m;
-//               ^^^
-//
-// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: 'var' isn't a type.
-//   Map<String, var> m;
-//               ^^^
-
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: The keyword 'var' can't be used as a type name.
+//   Map<String, var> m;
+//               ^^^
+//
+// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: Type 'var' not found.
+//   Map<String, var> m;
+//               ^^^
+//
+// pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: 'var' isn't a type.
+//   Map<String, var> m;
+//               ^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/var_as_type_name.dart.strong.transformed.expect b/pkg/front_end/testcases/var_as_type_name.dart.strong.transformed.expect
index ebce5d7..8c534a9 100644
--- a/pkg/front_end/testcases/var_as_type_name.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/var_as_type_name.dart.strong.transformed.expect
@@ -1,4 +1,6 @@
-// Unhandled errors:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: The keyword 'var' can't be used as a type name.
 //   Map<String, var> m;
@@ -11,8 +13,7 @@
 // pkg/front_end/testcases/var_as_type_name.dart:6:15: Error: 'var' isn't a type.
 //   Map<String, var> m;
 //               ^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/warn_unresolved_sends.dart.legacy.expect b/pkg/front_end/testcases/warn_unresolved_sends.dart.legacy.expect
index 46b046b..6a98a24 100644
--- a/pkg/front_end/testcases/warn_unresolved_sends.dart.legacy.expect
+++ b/pkg/front_end/testcases/warn_unresolved_sends.dart.legacy.expect
@@ -1,4 +1,6 @@
-// Formatted problems:
+library;
+//
+// Problems in library:
 //
 // pkg/front_end/testcases/warn_unresolved_sends.dart:49:39: Warning: Getter not found: 'missingField'.
 //     this. /*@warning=GetterNotFound*/ missingField;
@@ -23,8 +25,7 @@
 // pkg/front_end/testcases/warn_unresolved_sends.dart:55:33: Warning: Method not found: 'missingMethod'.
 //     /*@warning=MethodNotFound*/ missingMethod();
 //                                 ^^^^^^^^^^^^^
-
-library;
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/front_end/testcases/warn_unresolved_sends.dart.legacy.transformed.expect b/pkg/front_end/testcases/warn_unresolved_sends.dart.legacy.transformed.expect
index 08aae4d..6a98a24 100644
--- a/pkg/front_end/testcases/warn_unresolved_sends.dart.legacy.transformed.expect
+++ b/pkg/front_end/testcases/warn_unresolved_sends.dart.legacy.transformed.expect
@@ -1,4 +1,31 @@
 library;
+//
+// Problems in library:
+//
+// pkg/front_end/testcases/warn_unresolved_sends.dart:49:39: Warning: Getter not found: 'missingField'.
+//     this. /*@warning=GetterNotFound*/ missingField;
+//                                       ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/warn_unresolved_sends.dart:50:39: Warning: Setter not found: 'missingField'.
+//     this. /*@warning=SetterNotFound*/ missingField = 0;
+//                                       ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/warn_unresolved_sends.dart:51:39: Warning: Method not found: 'missingMethod'.
+//     this. /*@warning=MethodNotFound*/ missingMethod();
+//                                       ^^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/warn_unresolved_sends.dart:53:33: Warning: Getter not found: 'missingField'.
+//     /*@warning=GetterNotFound*/ missingField;
+//                                 ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/warn_unresolved_sends.dart:54:33: Warning: Setter not found: 'missingField'.
+//     /*@warning=SetterNotFound*/ missingField = 0;
+//                                 ^^^^^^^^^^^^
+//
+// pkg/front_end/testcases/warn_unresolved_sends.dart:55:33: Warning: Method not found: 'missingMethod'.
+//     /*@warning=MethodNotFound*/ missingMethod();
+//                                 ^^^^^^^^^^^^^
+//
 import self as self;
 import "dart:core" as core;
 
diff --git a/pkg/kernel/lib/text/ast_to_text.dart b/pkg/kernel/lib/text/ast_to_text.dart
index 8899c8a..4c4734c 100644
--- a/pkg/kernel/lib/text/ast_to_text.dart
+++ b/pkg/kernel/lib/text/ast_to_text.dart
@@ -5,6 +5,8 @@
 
 import 'dart:core' hide MapEntry;
 
+import 'dart:convert' show json;
+
 import '../ast.dart';
 import '../import_table.dart';
 
@@ -344,6 +346,32 @@
     }
   }
 
+  void writeComponentProblems(Component component) {
+    writeProblemsAsJson("Problems in component", component.problemsAsJson);
+  }
+
+  void writeProblemsAsJson(String header, Set<String> problemsAsJson) {
+    if (problemsAsJson?.isEmpty == false) {
+      endLine("//");
+      write("// ");
+      write(header);
+      endLine(":");
+      endLine("//");
+      for (String s in problemsAsJson) {
+        Map<String, Object> decoded = json.decode(s);
+        List<Object> plainTextFormatted = decoded["plainTextFormatted"];
+        List<String> lines = plainTextFormatted.join("\n").split("\n");
+        for (int i = 0; i < lines.length; i++) {
+          write("//");
+          String trimmed = lines[i].trimRight();
+          if (trimmed.isNotEmpty) write(" ");
+          endLine(trimmed);
+        }
+        if (lines.isNotEmpty) endLine("//");
+      }
+    }
+  }
+
   void writeLibraryFile(Library library) {
     writeAnnotationList(library.annotations);
     writeWord('library');
@@ -351,6 +379,9 @@
       writeWord(library.name);
     }
     endLine(';');
+
+    writeProblemsAsJson("Problems in library", library.problemsAsJson);
+
     var imports = new LibraryImportTable(library);
     for (var library in imports.importedLibraries) {
       var importPath = imports.getImportPath(library);
@@ -437,6 +468,7 @@
       writeWord(prefix);
       endLine(' {');
       ++inner.indentation;
+      writeProblemsAsJson("Problems in library", library.problemsAsJson);
       library.dependencies.forEach(inner.writeNode);
       library.typedefs.forEach(inner.writeNode);
       library.classes.forEach(inner.writeNode);