[cfe] Improve experiment not enabled messages
The updates the messaging for when experimental features are not
enabled to take into account whether the feature has been released
and whether an explicit or implicit language version opt out the
feature.
Change-Id: I77c31e7e327d1beca2dd4a82dbaf648711894e7a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/239663
Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
diff --git a/pkg/_fe_analyzer_shared/lib/src/messages/codes_generated.dart b/pkg/_fe_analyzer_shared/lib/src/messages/codes_generated.dart
index a0e3573..830127a 100644
--- a/pkg/_fe_analyzer_shared/lib/src/messages/codes_generated.dart
+++ b/pkg/_fe_analyzer_shared/lib/src/messages/codes_generated.dart
@@ -3462,27 +3462,29 @@
}
// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-const Template<Message Function(String string2)>
+const Template<Message Function(String string, String string2)>
templateExperimentDisabledInvalidLanguageVersion =
- const Template<Message Function(String string2)>(
+ const Template<Message Function(String string, String string2)>(
problemMessageTemplate:
- r"""This requires the null safety language feature, which requires language version of #string2 or higher.""",
+ r"""This requires the '#string' language feature, which requires language version of #string2 or higher.""",
withArguments: _withArgumentsExperimentDisabledInvalidLanguageVersion);
// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-const Code<Message Function(String string2)>
+const Code<Message Function(String string, String string2)>
codeExperimentDisabledInvalidLanguageVersion =
- const Code<Message Function(String string2)>(
+ const Code<Message Function(String string, String string2)>(
"ExperimentDisabledInvalidLanguageVersion",
analyzerCodes: <String>["ParserErrorCode.EXPERIMENT_NOT_ENABLED"]);
// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-Message _withArgumentsExperimentDisabledInvalidLanguageVersion(String string2) {
+Message _withArgumentsExperimentDisabledInvalidLanguageVersion(
+ String string, String string2) {
+ if (string.isEmpty) throw 'No string provided';
if (string2.isEmpty) throw 'No string provided';
return new Message(codeExperimentDisabledInvalidLanguageVersion,
problemMessage:
- """This requires the null safety language feature, which requires language version of ${string2} or higher.""",
- arguments: {'string2': string2});
+ """This requires the '${string}' language feature, which requires language version of ${string2} or higher.""",
+ arguments: {'string': string, 'string2': string2});
}
// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
@@ -3518,6 +3520,123 @@
}
// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Template<
+ Message Function(
+ String
+ string)> templateExperimentNotEnabledOffByDefault = const Template<
+ Message Function(String string)>(
+ problemMessageTemplate:
+ r"""This requires the experimental '#string' language feature to be enabled.""",
+ correctionMessageTemplate:
+ r"""Try passing the '--enable-experiment=#string' command line option.""",
+ withArguments: _withArgumentsExperimentNotEnabledOffByDefault);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Message Function(String string)>
+ codeExperimentNotEnabledOffByDefault =
+ const Code<Message Function(String string)>(
+ "ExperimentNotEnabledOffByDefault",
+ analyzerCodes: <String>["ParserErrorCode.EXPERIMENT_NOT_ENABLED"]);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+Message _withArgumentsExperimentNotEnabledOffByDefault(String string) {
+ if (string.isEmpty) throw 'No string provided';
+ return new Message(codeExperimentNotEnabledOffByDefault,
+ problemMessage:
+ """This requires the experimental '${string}' language feature to be enabled.""",
+ correctionMessage: """Try passing the '--enable-experiment=${string}' command line option.""",
+ arguments: {'string': string});
+}
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Template<
+ Message Function(
+ String
+ string)> templateExperimentOptOutComment = const Template<
+ Message Function(String string)>(
+ problemMessageTemplate:
+ r"""This is the annotation that opts out this library from the '#string' language feature.""",
+ withArguments: _withArgumentsExperimentOptOutComment);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Message Function(String string)> codeExperimentOptOutComment =
+ const Code<Message Function(String string)>("ExperimentOptOutComment",
+ severity: Severity.context);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+Message _withArgumentsExperimentOptOutComment(String string) {
+ if (string.isEmpty) throw 'No string provided';
+ return new Message(codeExperimentOptOutComment,
+ problemMessage:
+ """This is the annotation that opts out this library from the '${string}' language feature.""",
+ arguments: {'string': string});
+}
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Template<
+ Message Function(
+ String string,
+ String
+ string2)> templateExperimentOptOutExplicit = const Template<
+ Message Function(String string, String string2)>(
+ problemMessageTemplate:
+ r"""The '#string' language feature is disabled for this library.""",
+ correctionMessageTemplate:
+ r"""Try removing the `@dart=` annotation or setting the language version to #string2 or higher.""",
+ withArguments: _withArgumentsExperimentOptOutExplicit);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Message Function(String string, String string2)>
+ codeExperimentOptOutExplicit =
+ const Code<Message Function(String string, String string2)>(
+ "ExperimentOptOutExplicit",
+);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+Message _withArgumentsExperimentOptOutExplicit(String string, String string2) {
+ if (string.isEmpty) throw 'No string provided';
+ if (string2.isEmpty) throw 'No string provided';
+ return new Message(codeExperimentOptOutExplicit,
+ problemMessage:
+ """The '${string}' language feature is disabled for this library.""",
+ correctionMessage:
+ """Try removing the `@dart=` annotation or setting the language version to ${string2} or higher.""",
+ arguments: {'string': string, 'string2': string2});
+}
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Template<
+ Message Function(
+ String string,
+ String
+ string2)> templateExperimentOptOutImplicit = const Template<
+ Message Function(String string, String string2)>(
+ problemMessageTemplate:
+ r"""The '#string' language feature is disabled for this library.""",
+ correctionMessageTemplate:
+ r"""Try removing the package language version or setting the language version to #string2 or higher.""",
+ withArguments: _withArgumentsExperimentOptOutImplicit);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Message Function(String string, String string2)>
+ codeExperimentOptOutImplicit =
+ const Code<Message Function(String string, String string2)>(
+ "ExperimentOptOutImplicit",
+);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+Message _withArgumentsExperimentOptOutImplicit(String string, String string2) {
+ if (string.isEmpty) throw 'No string provided';
+ if (string2.isEmpty) throw 'No string provided';
+ return new Message(codeExperimentOptOutImplicit,
+ problemMessage:
+ """The '${string}' language feature is disabled for this library.""",
+ correctionMessage:
+ """Try removing the package language version or setting the language version to ${string2} or higher.""",
+ arguments: {'string': string, 'string2': string2});
+}
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
const Code<Null> codeExplicitExtensionArgumentMismatch =
messageExplicitExtensionArgumentMismatch;
@@ -8114,72 +8233,6 @@
}
// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-const Code<Null> codeNonNullableOptOutComment = messageNonNullableOptOutComment;
-
-// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-const MessageCode messageNonNullableOptOutComment = const MessageCode(
- "NonNullableOptOutComment",
- severity: Severity.context,
- problemMessage:
- r"""This is the annotation that opts out this library from null safety features.""");
-
-// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-const Template<
- Message Function(
- String
- string)> templateNonNullableOptOutExplicit = const Template<
- Message Function(String string)>(
- problemMessageTemplate:
- r"""Null safety features are disabled for this library.""",
- correctionMessageTemplate:
- r"""Try removing the `@dart=` annotation or setting the language version to #string or higher.""",
- withArguments: _withArgumentsNonNullableOptOutExplicit);
-
-// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-const Code<Message Function(String string)> codeNonNullableOptOutExplicit =
- const Code<Message Function(String string)>(
- "NonNullableOptOutExplicit",
-);
-
-// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-Message _withArgumentsNonNullableOptOutExplicit(String string) {
- if (string.isEmpty) throw 'No string provided';
- return new Message(codeNonNullableOptOutExplicit,
- problemMessage: """Null safety features are disabled for this library.""",
- correctionMessage:
- """Try removing the `@dart=` annotation or setting the language version to ${string} or higher.""",
- arguments: {'string': string});
-}
-
-// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-const Template<
- Message Function(
- String
- string)> templateNonNullableOptOutImplicit = const Template<
- Message Function(String string)>(
- problemMessageTemplate:
- r"""Null safety features are disabled for this library.""",
- correctionMessageTemplate:
- r"""Try removing the package language version or setting the language version to #string or higher.""",
- withArguments: _withArgumentsNonNullableOptOutImplicit);
-
-// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-const Code<Message Function(String string)> codeNonNullableOptOutImplicit =
- const Code<Message Function(String string)>(
- "NonNullableOptOutImplicit",
-);
-
-// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
-Message _withArgumentsNonNullableOptOutImplicit(String string) {
- if (string.isEmpty) throw 'No string provided';
- return new Message(codeNonNullableOptOutImplicit,
- problemMessage: """Null safety features are disabled for this library.""",
- correctionMessage:
- """Try removing the package language version or setting the language version to ${string} or higher.""",
- arguments: {'string': string});
-}
-
-// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
const Code<Null> codeNonPartOfDirectiveInPart = messageNonPartOfDirectiveInPart;
// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
@@ -8396,6 +8449,96 @@
r"""Try moving the '?..' operator to be the first cascade operator in the sequence.""");
// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Template<Message Function(String string2)>
+ templateNullSafetyDisabledInvalidLanguageVersion =
+ const Template<Message Function(String string2)>(
+ problemMessageTemplate:
+ r"""This requires the null safety language feature, which requires language version of #string2 or higher.""",
+ withArguments: _withArgumentsNullSafetyDisabledInvalidLanguageVersion);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Message Function(String string2)>
+ codeNullSafetyDisabledInvalidLanguageVersion =
+ const Code<Message Function(String string2)>(
+ "NullSafetyDisabledInvalidLanguageVersion",
+ analyzerCodes: <String>["ParserErrorCode.EXPERIMENT_NOT_ENABLED"]);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+Message _withArgumentsNullSafetyDisabledInvalidLanguageVersion(String string2) {
+ if (string2.isEmpty) throw 'No string provided';
+ return new Message(codeNullSafetyDisabledInvalidLanguageVersion,
+ problemMessage:
+ """This requires the null safety language feature, which requires language version of ${string2} or higher.""",
+ arguments: {'string2': string2});
+}
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Null> codeNullSafetyOptOutComment = messageNullSafetyOptOutComment;
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const MessageCode messageNullSafetyOptOutComment = const MessageCode(
+ "NullSafetyOptOutComment",
+ severity: Severity.context,
+ problemMessage:
+ r"""This is the annotation that opts out this library from null safety features.""");
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Template<
+ Message Function(
+ String
+ string)> templateNullSafetyOptOutExplicit = const Template<
+ Message Function(String string)>(
+ problemMessageTemplate:
+ r"""Null safety features are disabled for this library.""",
+ correctionMessageTemplate:
+ r"""Try removing the `@dart=` annotation or setting the language version to #string or higher.""",
+ withArguments: _withArgumentsNullSafetyOptOutExplicit);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Message Function(String string)> codeNullSafetyOptOutExplicit =
+ const Code<Message Function(String string)>(
+ "NullSafetyOptOutExplicit",
+);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+Message _withArgumentsNullSafetyOptOutExplicit(String string) {
+ if (string.isEmpty) throw 'No string provided';
+ return new Message(codeNullSafetyOptOutExplicit,
+ problemMessage: """Null safety features are disabled for this library.""",
+ correctionMessage:
+ """Try removing the `@dart=` annotation or setting the language version to ${string} or higher.""",
+ arguments: {'string': string});
+}
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Template<
+ Message Function(
+ String
+ string)> templateNullSafetyOptOutImplicit = const Template<
+ Message Function(String string)>(
+ problemMessageTemplate:
+ r"""Null safety features are disabled for this library.""",
+ correctionMessageTemplate:
+ r"""Try removing the package language version or setting the language version to #string or higher.""",
+ withArguments: _withArgumentsNullSafetyOptOutImplicit);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Message Function(String string)> codeNullSafetyOptOutImplicit =
+ const Code<Message Function(String string)>(
+ "NullSafetyOptOutImplicit",
+);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+Message _withArgumentsNullSafetyOptOutImplicit(String string) {
+ if (string.isEmpty) throw 'No string provided';
+ return new Message(codeNullSafetyOptOutImplicit,
+ problemMessage: """Null safety features are disabled for this library.""",
+ correctionMessage:
+ """Try removing the package language version or setting the language version to ${string} or higher.""",
+ arguments: {'string': string});
+}
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
const Template<Message Function(String name)> templateNullableInterfaceError =
const Template<Message Function(String name)>(
problemMessageTemplate:
diff --git a/pkg/front_end/lib/src/api_prototype/experimental_flags.dart b/pkg/front_end/lib/src/api_prototype/experimental_flags.dart
index 340761c..2d2a630 100644
--- a/pkg/front_end/lib/src/api_prototype/experimental_flags.dart
+++ b/pkg/front_end/lib/src/api_prototype/experimental_flags.dart
@@ -4,8 +4,6 @@
import 'package:kernel/kernel.dart' show Version;
-import '../fasta/fasta_codes.dart';
-
part 'experimental_flags_generated.dart';
/// The set of experiments enabled for SDK and packages.
@@ -262,11 +260,4 @@
LibraryFeature(ExperimentalFlag flag, this.isSupported, this.enabledVersion,
this.isEnabled)
: super(flag);
-
- // TODO(johnniwinther): We should emit a different message when the
- // experiment is not released yet. The current message indicates that
- // changing the sdk version can solve the problem.
- /// Returns a [Message] for reporting that this feature is not enabled.
- Message get notEnabledMessage => templateExperimentNotEnabled.withArguments(
- flag.name, enabledVersion.toText());
}
diff --git a/pkg/front_end/lib/src/fasta/builder/named_type_builder.dart b/pkg/front_end/lib/src/fasta/builder/named_type_builder.dart
index 6855fda..1c68cb6 100644
--- a/pkg/front_end/lib/src/fasta/builder/named_type_builder.dart
+++ b/pkg/front_end/lib/src/fasta/builder/named_type_builder.dart
@@ -269,11 +269,13 @@
if (_declaration!.isExtension &&
library is SourceLibraryBuilder &&
!library.libraryFeatures.extensionTypes.isEnabled) {
- Message message =
- library.libraryFeatures.extensionTypes.notEnabledMessage;
int typeNameLength = nameLength;
int typeNameOffset = nameOffset;
- library.addProblem(message, typeNameOffset, typeNameLength, fileUri);
+ Message message = library.reportFeatureNotEnabled(
+ library.libraryFeatures.extensionTypes,
+ fileUri!,
+ typeNameOffset,
+ typeNameLength);
_declaration = buildInvalidTypeDeclarationBuilder(
message.withLocation(fileUri!, typeNameOffset, typeNameLength));
} else if (_declaration!.isTypeVariable) {
diff --git a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
index b9b2813..af89434 100644
--- a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
@@ -7198,8 +7198,11 @@
..fileOffset = openAngleBracket.charOffset);
}
} else {
- addProblem(libraryFeatures.constructorTearoffs.notEnabledMessage,
- openAngleBracket.charOffset, noLength);
+ libraryBuilder.reportFeatureNotEnabled(
+ libraryFeatures.constructorTearoffs,
+ uri,
+ openAngleBracket.charOffset,
+ noLength);
}
}
diff --git a/pkg/front_end/lib/src/fasta/source/outline_builder.dart b/pkg/front_end/lib/src/fasta/source/outline_builder.dart
index 3793ca5..17173a4 100644
--- a/pkg/front_end/lib/src/fasta/source/outline_builder.dart
+++ b/pkg/front_end/lib/src/fasta/source/outline_builder.dart
@@ -3076,8 +3076,8 @@
// For entries that consist of their name only, all of the elements
// of the constructor reference should be null.
if (typeArguments != null || suffix != null) {
- addProblem(libraryFeatures.enhancedEnums.notEnabledMessage,
- charOffset, noLength);
+ libraryBuilder.reportFeatureNotEnabled(
+ libraryFeatures.enhancedEnums, uri, charOffset, noLength);
}
push(NullValue.ConstructorReference);
}
diff --git a/pkg/front_end/lib/src/fasta/source/source_library_builder.dart b/pkg/front_end/lib/src/fasta/source/source_library_builder.dart
index 177d445..56607a6 100644
--- a/pkg/front_end/lib/src/fasta/source/source_library_builder.dart
+++ b/pkg/front_end/lib/src/fasta/source/source_library_builder.dart
@@ -317,6 +317,50 @@
_libraryFeatures ??= new LibraryFeatures(loader.target.globalFeatures,
_packageUri ?? importUri, languageVersion.version);
+ /// Reports that [feature] is not enabled, using [charOffset] and
+ /// [length] for the location of the message.
+ ///
+ /// Return the primary message.
+ Message reportFeatureNotEnabled(
+ LibraryFeature feature, Uri fileUri, int charOffset, int length) {
+ assert(!feature.isEnabled);
+ Message message;
+ if (feature.isSupported) {
+ if (languageVersion.isExplicit) {
+ message = templateExperimentOptOutExplicit.withArguments(
+ feature.flag.name, feature.enabledVersion.toText());
+ addProblem(message, charOffset, length, fileUri,
+ context: <LocatedMessage>[
+ templateExperimentOptOutComment
+ .withArguments(feature.flag.name)
+ .withLocation(languageVersion.fileUri!,
+ languageVersion.charOffset, languageVersion.charCount)
+ ]);
+ } else {
+ message = templateExperimentOptOutImplicit.withArguments(
+ feature.flag.name, feature.enabledVersion.toText());
+ addProblem(message, charOffset, length, fileUri);
+ }
+ } else {
+ if (feature.flag.isEnabledByDefault) {
+ if (languageVersion.version < feature.enabledVersion) {
+ message =
+ templateExperimentDisabledInvalidLanguageVersion.withArguments(
+ feature.flag.name, feature.enabledVersion.toText());
+ addProblem(message, charOffset, length, fileUri);
+ } else {
+ message = templateExperimentDisabled.withArguments(feature.flag.name);
+ addProblem(message, charOffset, length, fileUri);
+ }
+ } else {
+ message = templateExperimentNotEnabledOffByDefault
+ .withArguments(feature.flag.name);
+ addProblem(message, charOffset, length, fileUri);
+ }
+ }
+ return message;
+ }
+
void _updateLibraryNNBDSettings() {
library.isNonNullableByDefault = isNonNullableByDefault;
switch (loader.nnbdMode) {
diff --git a/pkg/front_end/lib/src/fasta/source/stack_listener_impl.dart b/pkg/front_end/lib/src/fasta/source/stack_listener_impl.dart
index be0fc08..30f281c 100644
--- a/pkg/front_end/lib/src/fasta/source/stack_listener_impl.dart
+++ b/pkg/front_end/lib/src/fasta/source/stack_listener_impl.dart
@@ -81,19 +81,19 @@
if (libraryFeatures.nonNullable.isSupported) {
if (libraryBuilder.languageVersion.isExplicit) {
addProblem(
- templateNonNullableOptOutExplicit.withArguments(
+ templateNullSafetyOptOutExplicit.withArguments(
libraryFeatures.nonNullable.enabledVersion.toText()),
token.charOffset,
token.charCount,
context: <LocatedMessage>[
- messageNonNullableOptOutComment.withLocation(
+ messageNullSafetyOptOutComment.withLocation(
libraryBuilder.languageVersion.fileUri!,
libraryBuilder.languageVersion.charOffset,
libraryBuilder.languageVersion.charCount)
]);
} else {
addProblem(
- templateNonNullableOptOutImplicit.withArguments(
+ templateNullSafetyOptOutImplicit.withArguments(
libraryFeatures.nonNullable.enabledVersion.toText()),
token.charOffset,
token.charCount);
@@ -102,7 +102,7 @@
if (libraryBuilder.languageVersion.version <
libraryFeatures.nonNullable.enabledVersion) {
addProblem(
- templateExperimentDisabledInvalidLanguageVersion.withArguments(
+ templateNullSafetyDisabledInvalidLanguageVersion.withArguments(
libraryFeatures.nonNullable.enabledVersion.toText()),
token.offset,
noLength);
@@ -119,7 +119,7 @@
/// Return `true` if the [feature] is not enabled.
bool reportIfNotEnabled(LibraryFeature feature, int charOffset, int length) {
if (!feature.isEnabled) {
- addProblem(feature.notEnabledMessage, charOffset, length);
+ libraryBuilder.reportFeatureNotEnabled(feature, uri, charOffset, length);
return true;
}
return false;
diff --git a/pkg/front_end/messages.status b/pkg/front_end/messages.status
index 078af67..3d82ad2 100644
--- a/pkg/front_end/messages.status
+++ b/pkg/front_end/messages.status
@@ -278,6 +278,11 @@
ExperimentNotEnabled/example: Fail
ExperimentNotEnabledNoFlag/example: Fail
ExperimentNotEnabledNoFlagInvalidLanguageVersion/example: Fail
+ExperimentNotEnabledOffByDefault/example: Fail
+ExperimentOptOutExplicit/analyzerCode: Fail
+ExperimentOptOutExplicit/example: Fail
+ExperimentOptOutImplicit/analyzerCode: Fail
+ExperimentOptOutImplicit/example: Fail
ExplicitExtensionArgumentMismatch/analyzerCode: Fail
ExplicitExtensionArgumentMismatch/example: Fail
ExplicitExtensionAsExpression/analyzerCode: Fail
@@ -678,6 +683,11 @@
NotBinaryOperator/analyzerCode: Fail
NotConstantExpression/example: Fail
NullAwareCascadeOutOfOrder/example: Fail
+NullSafetyDisabledInvalidLanguageVersion/example: Fail
+NullSafetyOptOutExplicit/analyzerCode: Fail
+NullSafetyOptOutExplicit/example: Fail
+NullSafetyOptOutImplicit/analyzerCode: Fail
+NullSafetyOptOutImplicit/example: Fail
NullableExpressionCallError/analyzerCode: Fail
NullableExpressionCallError/example: Fail
NullableExpressionCallWarning/analyzerCode: Fail
diff --git a/pkg/front_end/messages.yaml b/pkg/front_end/messages.yaml
index c2b37b6..2e1aa57 100644
--- a/pkg/front_end/messages.yaml
+++ b/pkg/front_end/messages.yaml
@@ -286,15 +286,24 @@
correctionMessage: "Try updating your pubspec.yaml to set the minimum SDK constraint to #string2 or higher, and running 'pub get'."
analyzerCode: ParserErrorCode.EXPERIMENT_NOT_ENABLED
+ExperimentNotEnabledOffByDefault:
+ problemMessage: "This requires the experimental '#string' language feature to be enabled."
+ correctionMessage: "Try passing the '--enable-experiment=#string' command line option."
+ analyzerCode: ParserErrorCode.EXPERIMENT_NOT_ENABLED
+
ExperimentDisabled:
problemMessage: "This requires the '#string' language feature to be enabled."
correctionMessage: "The feature is on by default but is currently disabled, maybe because the '--enable-experiment=no-#string' command line option is passed."
analyzerCode: ParserErrorCode.EXPERIMENT_NOT_ENABLED
-ExperimentDisabledInvalidLanguageVersion:
+NullSafetyDisabledInvalidLanguageVersion:
problemMessage: "This requires the null safety language feature, which requires language version of #string2 or higher."
analyzerCode: ParserErrorCode.EXPERIMENT_NOT_ENABLED
+ExperimentDisabledInvalidLanguageVersion:
+ problemMessage: "This requires the '#string' language feature, which requires language version of #string2 or higher."
+ analyzerCode: ParserErrorCode.EXPERIMENT_NOT_ENABLED
+
EmptyNamedParameterList:
problemMessage: "Named parameter lists cannot be empty."
correctionMessage: "Try adding a named parameter to the list."
@@ -5096,18 +5105,30 @@
FieldNonNullableNotInitializedByConstructorError:
problemMessage: "This constructor should initialize field '#name' because its type '#type' doesn't allow null."
-NonNullableOptOutExplicit:
+NullSafetyOptOutExplicit:
problemMessage: "Null safety features are disabled for this library."
correctionMessage: "Try removing the `@dart=` annotation or setting the language version to #string or higher."
-NonNullableOptOutImplicit:
+ExperimentOptOutExplicit:
+ problemMessage: "The '#string' language feature is disabled for this library."
+ correctionMessage: "Try removing the `@dart=` annotation or setting the language version to #string2 or higher."
+
+NullSafetyOptOutImplicit:
problemMessage: "Null safety features are disabled for this library."
correctionMessage: "Try removing the package language version or setting the language version to #string or higher."
-NonNullableOptOutComment:
+NullSafetyOptOutComment:
problemMessage: "This is the annotation that opts out this library from null safety features."
severity: CONTEXT
+ExperimentOptOutImplicit:
+ problemMessage: "The '#string' language feature is disabled for this library."
+ correctionMessage: "Try removing the package language version or setting the language version to #string2 or higher."
+
+ExperimentOptOutComment:
+ problemMessage: "This is the annotation that opts out this library from the '#string' language feature."
+ severity: CONTEXT
+
AwaitInLateLocalInitializer:
problemMessage: "`await` expressions are not supported in late local initializers."
diff --git a/pkg/front_end/test/extensions/data/use_as_type.dart b/pkg/front_end/test/extensions/data/use_as_type.dart
index 791e6cc..824d8f1 100644
--- a/pkg/front_end/test/extensions/data/use_as_type.dart
+++ b/pkg/front_end/test/extensions/data/use_as_type.dart
@@ -34,19 +34,19 @@
extension B2<T> on B1<T> {}
main() {
- /*error: errors=[This requires the 'extension-types' language feature to be enabled.]*/
+ /*error: errors=[This requires the experimental 'extension-types' language feature to be enabled.]*/
A2 var1;
- /*error: errors=[This requires the 'extension-types' language feature to be enabled.]*/
+ /*error: errors=[This requires the experimental 'extension-types' language feature to be enabled.]*/
B2<A1> var2;
- B1</*error: errors=[This requires the 'extension-types' language feature to be enabled.]*/A2> var3;
+ B1</*error: errors=[This requires the experimental 'extension-types' language feature to be enabled.]*/A2> var3;
}
-/*error: errors=[This requires the 'extension-types' language feature to be enabled.]*/
+/*error: errors=[This requires the experimental 'extension-types' language feature to be enabled.]*/
A2 method1() => null;
// TODO(johnniwinther): We should report an error on the number of type
// arguments here.
-/*error: errors=[This requires the 'extension-types' language feature to be enabled.]*/
+/*error: errors=[This requires the experimental 'extension-types' language feature to be enabled.]*/
B2<A1> method2() => null;
-B1</*error: errors=[This requires the 'extension-types' language feature to be enabled.]*/A2> method3() => null;
+B1</*error: errors=[This requires the experimental 'extension-types' language feature to be enabled.]*/A2> method3() => null;
diff --git a/pkg/front_end/testcases/general/constants/issue46925.dart.weak.expect b/pkg/front_end/testcases/general/constants/issue46925.dart.weak.expect
index 86587cd..0954a14 100644
--- a/pkg/front_end/testcases/general/constants/issue46925.dart.weak.expect
+++ b/pkg/front_end/testcases/general/constants/issue46925.dart.weak.expect
@@ -2,47 +2,65 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:14:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:14:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v1 = MyClass<String>.new;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:14:30: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:14:30: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v1 = MyClass<String>.new;
// ^^^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:14:30: Error: Member not found: 'new'.
// const v1 = MyClass<String>.new;
// ^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:15:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:15:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v2 = MyClass<int>.constr;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:15:27: Error: Member not found: 'constr'.
// const v2 = MyClass<int>.constr;
// ^^^^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:16:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:16:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v3 = MyClass<int>.new;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:16:27: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:16:27: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v3 = MyClass<int>.new;
// ^^^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:16:27: Error: Member not found: 'new'.
// const v3 = MyClass<int>.new;
// ^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:17:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:17:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v4 = MyClass<String>.constr;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:17:30: Error: Member not found: 'constr'.
// const v4 = MyClass<String>.constr;
diff --git a/pkg/front_end/testcases/general/constants/issue46925.dart.weak.modular.expect b/pkg/front_end/testcases/general/constants/issue46925.dart.weak.modular.expect
index 86587cd..0954a14 100644
--- a/pkg/front_end/testcases/general/constants/issue46925.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/constants/issue46925.dart.weak.modular.expect
@@ -2,47 +2,65 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:14:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:14:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v1 = MyClass<String>.new;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:14:30: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:14:30: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v1 = MyClass<String>.new;
// ^^^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:14:30: Error: Member not found: 'new'.
// const v1 = MyClass<String>.new;
// ^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:15:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:15:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v2 = MyClass<int>.constr;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:15:27: Error: Member not found: 'constr'.
// const v2 = MyClass<int>.constr;
// ^^^^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:16:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:16:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v3 = MyClass<int>.new;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:16:27: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:16:27: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v3 = MyClass<int>.new;
// ^^^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:16:27: Error: Member not found: 'new'.
// const v3 = MyClass<int>.new;
// ^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:17:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:17:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v4 = MyClass<String>.constr;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:17:30: Error: Member not found: 'constr'.
// const v4 = MyClass<String>.constr;
diff --git a/pkg/front_end/testcases/general/constants/issue46925.dart.weak.transformed.expect b/pkg/front_end/testcases/general/constants/issue46925.dart.weak.transformed.expect
index 86587cd..0954a14 100644
--- a/pkg/front_end/testcases/general/constants/issue46925.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/constants/issue46925.dart.weak.transformed.expect
@@ -2,47 +2,65 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:14:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:14:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v1 = MyClass<String>.new;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:14:30: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:14:30: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v1 = MyClass<String>.new;
// ^^^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:14:30: Error: Member not found: 'new'.
// const v1 = MyClass<String>.new;
// ^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:15:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:15:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v2 = MyClass<int>.constr;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:15:27: Error: Member not found: 'constr'.
// const v2 = MyClass<int>.constr;
// ^^^^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:16:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:16:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v3 = MyClass<int>.new;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:16:27: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:16:27: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v3 = MyClass<int>.new;
// ^^^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:16:27: Error: Member not found: 'new'.
// const v3 = MyClass<int>.new;
// ^^^
//
-// pkg/front_end/testcases/general/constants/issue46925.dart:17:21: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/constants/issue46925.dart:17:21: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const v4 = MyClass<String>.constr;
// ^
+// pkg/front_end/testcases/general/constants/issue46925.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/constants/issue46925.dart:17:30: Error: Member not found: 'constr'.
// const v4 = MyClass<String>.constr;
diff --git a/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.expect b/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.expect
index 05dcdaa..8e9198b 100644
--- a/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.expect
+++ b/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:13:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:13:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:15:12: Error: A comparison expression can't be an operand of another comparison expression.
// Try putting parentheses around one of the comparisons.
@@ -34,33 +37,45 @@
// Class<int><int>();
// ^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:17:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:17:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:17:14: Error: Member not found: 'named'.
// Class<int>.named;
// ^^^^^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:19: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:19: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:14: Error: Member not found: 'named'.
// Class<int>.named<int>;
// ^^^^^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:20:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:20:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named<int>();
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:20:14: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -94,10 +109,13 @@
// Class<int><int>.named<int>;
// ^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:23:24: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:23:24: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int><int>.named<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:24:12: Error: A comparison expression can't be an operand of another comparison expression.
// Try putting parentheses around one of the comparisons.
diff --git a/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.modular.expect b/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.modular.expect
index 05dcdaa..8e9198b 100644
--- a/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.modular.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:13:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:13:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:15:12: Error: A comparison expression can't be an operand of another comparison expression.
// Try putting parentheses around one of the comparisons.
@@ -34,33 +37,45 @@
// Class<int><int>();
// ^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:17:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:17:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:17:14: Error: Member not found: 'named'.
// Class<int>.named;
// ^^^^^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:19: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:19: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:14: Error: Member not found: 'named'.
// Class<int>.named<int>;
// ^^^^^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:20:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:20:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named<int>();
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:20:14: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -94,10 +109,13 @@
// Class<int><int>.named<int>;
// ^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:23:24: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:23:24: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int><int>.named<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:24:12: Error: A comparison expression can't be an operand of another comparison expression.
// Try putting parentheses around one of the comparisons.
diff --git a/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.transformed.expect b/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.transformed.expect
index 0717dcf..db4e4b7 100644
--- a/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/duplicate_instantiation.dart.weak.transformed.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:13:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:13:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:15:12: Error: A comparison expression can't be an operand of another comparison expression.
// Try putting parentheses around one of the comparisons.
@@ -34,33 +37,45 @@
// Class<int><int>();
// ^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:17:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:17:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:17:14: Error: Member not found: 'named'.
// Class<int>.named;
// ^^^^^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:19: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:19: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:19:14: Error: Member not found: 'named'.
// Class<int>.named<int>;
// ^^^^^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:20:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:20:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int>.named<int>();
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:20:14: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -94,10 +109,13 @@
// Class<int><int>.named<int>;
// ^
//
-// pkg/front_end/testcases/general/duplicate_instantiation.dart:23:24: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:23:24: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// Class<int><int>.named<int>;
// ^
+// pkg/front_end/testcases/general/duplicate_instantiation.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/duplicate_instantiation.dart:24:12: Error: A comparison expression can't be an operand of another comparison expression.
// Try putting parentheses around one of the comparisons.
diff --git a/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.expect b/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.expect
index 4c629c8..792b410 100644
--- a/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.expect
+++ b/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.expect
@@ -2,19 +2,25 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// A() : super();
// ^
+// pkg/front_end/testcases/general/enum_super_constructor.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: Generative enum constructors must be marked as 'const'.
// A() : super();
// ^
//
-// pkg/front_end/testcases/general/enum_super_constructor.dart:14:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/enum_super_constructor.dart:14:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// const B() : super();
// ^
+// pkg/front_end/testcases/general/enum_super_constructor.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/enum_super_constructor.dart:14:15: Error: Enum constructors can't contain super-initializers.
// const B() : super();
diff --git a/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.modular.expect b/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.modular.expect
index 4c629c8..792b410 100644
--- a/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.modular.expect
@@ -2,19 +2,25 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// A() : super();
// ^
+// pkg/front_end/testcases/general/enum_super_constructor.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: Generative enum constructors must be marked as 'const'.
// A() : super();
// ^
//
-// pkg/front_end/testcases/general/enum_super_constructor.dart:14:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/enum_super_constructor.dart:14:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// const B() : super();
// ^
+// pkg/front_end/testcases/general/enum_super_constructor.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/enum_super_constructor.dart:14:15: Error: Enum constructors can't contain super-initializers.
// const B() : super();
diff --git a/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.outline.expect b/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.outline.expect
index ce1a0f0..2c1f516 100644
--- a/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.outline.expect
@@ -2,19 +2,25 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// A() : super();
// ^
+// pkg/front_end/testcases/general/enum_super_constructor.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: Generative enum constructors must be marked as 'const'.
// A() : super();
// ^
//
-// pkg/front_end/testcases/general/enum_super_constructor.dart:14:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/enum_super_constructor.dart:14:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// const B() : super();
// ^
+// pkg/front_end/testcases/general/enum_super_constructor.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/enum_super_constructor.dart:14:15: Error: Enum constructors can't contain super-initializers.
// const B() : super();
diff --git a/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.transformed.expect b/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.transformed.expect
index 4c629c8..792b410 100644
--- a/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/enum_super_constructor.dart.weak.transformed.expect
@@ -2,19 +2,25 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// A() : super();
// ^
+// pkg/front_end/testcases/general/enum_super_constructor.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/enum_super_constructor.dart:9:3: Error: Generative enum constructors must be marked as 'const'.
// A() : super();
// ^
//
-// pkg/front_end/testcases/general/enum_super_constructor.dart:14:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/enum_super_constructor.dart:14:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// const B() : super();
// ^
+// pkg/front_end/testcases/general/enum_super_constructor.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/enum_super_constructor.dart:14:15: Error: Enum constructors can't contain super-initializers.
// const B() : super();
diff --git a/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.expect b/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.expect
index 2777d14..309a3aa 100644
--- a/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.expect
+++ b/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.expect
@@ -2,8 +2,8 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart:11:6: Error: This requires the 'extension-types' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart:11:6: Error: This requires the experimental 'extension-types' language feature to be enabled.
+// Try passing the '--enable-experiment=extension-types' command line option.
// test(E e) {} // Error.
// ^
//
diff --git a/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.modular.expect b/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.modular.expect
index 2777d14..309a3aa 100644
--- a/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.modular.expect
@@ -2,8 +2,8 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart:11:6: Error: This requires the 'extension-types' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart:11:6: Error: This requires the experimental 'extension-types' language feature to be enabled.
+// Try passing the '--enable-experiment=extension-types' command line option.
// test(E e) {} // Error.
// ^
//
diff --git a/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.outline.expect b/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.outline.expect
index 05bcb32..13024a4 100644
--- a/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.outline.expect
@@ -2,8 +2,8 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart:11:6: Error: This requires the 'extension-types' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart:11:6: Error: This requires the experimental 'extension-types' language feature to be enabled.
+// Try passing the '--enable-experiment=extension-types' command line option.
// test(E e) {} // Error.
// ^
//
diff --git a/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.transformed.expect b/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.transformed.expect
index 2777d14..309a3aa 100644
--- a/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart.weak.transformed.expect
@@ -2,8 +2,8 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart:11:6: Error: This requires the 'extension-types' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/extension_type_when_experiment_not_enabled.dart:11:6: Error: This requires the experimental 'extension-types' language feature to be enabled.
+// Try passing the '--enable-experiment=extension-types' command line option.
// test(E e) {} // Error.
// ^
//
diff --git a/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.expect b/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.expect
index 1fcab84f..aa67aa6 100644
--- a/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.expect
+++ b/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.expect
@@ -2,8 +2,8 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart:9:11: Error: This requires the 'extension-types' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart:9:11: Error: This requires the experimental 'extension-types' language feature to be enabled.
+// Try passing the '--enable-experiment=extension-types' command line option.
// extension type E on A {} // Error because of 'type'.
// ^^^^
//
diff --git a/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.modular.expect b/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.modular.expect
index 1fcab84f..aa67aa6 100644
--- a/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.modular.expect
@@ -2,8 +2,8 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart:9:11: Error: This requires the 'extension-types' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart:9:11: Error: This requires the experimental 'extension-types' language feature to be enabled.
+// Try passing the '--enable-experiment=extension-types' command line option.
// extension type E on A {} // Error because of 'type'.
// ^^^^
//
diff --git a/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.outline.expect b/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.outline.expect
index 9141057..74e110e 100644
--- a/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.outline.expect
@@ -2,8 +2,8 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart:9:11: Error: This requires the 'extension-types' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart:9:11: Error: This requires the experimental 'extension-types' language feature to be enabled.
+// Try passing the '--enable-experiment=extension-types' command line option.
// extension type E on A {} // Error because of 'type'.
// ^^^^
//
diff --git a/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.transformed.expect b/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.transformed.expect
index 1fcab84f..aa67aa6 100644
--- a/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart.weak.transformed.expect
@@ -2,8 +2,8 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart:9:11: Error: This requires the 'extension-types' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/extension_types_feature_not_enabled.dart:9:11: Error: This requires the experimental 'extension-types' language feature to be enabled.
+// Try passing the '--enable-experiment=extension-types' command line option.
// extension type E on A {} // Error because of 'type'.
// ^^^^
//
diff --git a/pkg/front_end/testcases/general/issue46719.dart.weak.expect b/pkg/front_end/testcases/general/issue46719.dart.weak.expect
index 449b259..3fb8261 100644
--- a/pkg/front_end/testcases/general/issue46719.dart.weak.expect
+++ b/pkg/front_end/testcases/general/issue46719.dart.weak.expect
@@ -26,24 +26,33 @@
// self.m<String>.applyAndPrint(['three']);
// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/issue46719.dart:33:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue46719.dart:33:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// self.A.n<int>.applyAndPrint([2]);
// ^
+// pkg/front_end/testcases/general/issue46719.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/issue46719.dart:34:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue46719.dart:34:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// self.A.n<String>.applyAndPrint(['three']);
// ^
+// pkg/front_end/testcases/general/issue46719.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/issue46719.dart:35:5: Error: Member not found: 'named'.
// A.named.toString();
// ^^^^^
//
-// pkg/front_end/testcases/general/issue46719.dart:36:4: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue46719.dart:36:4: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// A<int>.named.toString();
// ^
+// pkg/front_end/testcases/general/issue46719.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/issue46719.dart:36:10: Error: Member not found: 'named'.
// A<int>.named.toString();
diff --git a/pkg/front_end/testcases/general/issue46719.dart.weak.modular.expect b/pkg/front_end/testcases/general/issue46719.dart.weak.modular.expect
index 449b259..3fb8261 100644
--- a/pkg/front_end/testcases/general/issue46719.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/issue46719.dart.weak.modular.expect
@@ -26,24 +26,33 @@
// self.m<String>.applyAndPrint(['three']);
// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/issue46719.dart:33:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue46719.dart:33:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// self.A.n<int>.applyAndPrint([2]);
// ^
+// pkg/front_end/testcases/general/issue46719.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/issue46719.dart:34:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue46719.dart:34:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// self.A.n<String>.applyAndPrint(['three']);
// ^
+// pkg/front_end/testcases/general/issue46719.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/issue46719.dart:35:5: Error: Member not found: 'named'.
// A.named.toString();
// ^^^^^
//
-// pkg/front_end/testcases/general/issue46719.dart:36:4: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue46719.dart:36:4: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// A<int>.named.toString();
// ^
+// pkg/front_end/testcases/general/issue46719.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/issue46719.dart:36:10: Error: Member not found: 'named'.
// A<int>.named.toString();
diff --git a/pkg/front_end/testcases/general/issue46719.dart.weak.transformed.expect b/pkg/front_end/testcases/general/issue46719.dart.weak.transformed.expect
index 68480b5..f46b021 100644
--- a/pkg/front_end/testcases/general/issue46719.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/issue46719.dart.weak.transformed.expect
@@ -26,24 +26,33 @@
// self.m<String>.applyAndPrint(['three']);
// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/issue46719.dart:33:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue46719.dart:33:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// self.A.n<int>.applyAndPrint([2]);
// ^
+// pkg/front_end/testcases/general/issue46719.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/issue46719.dart:34:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue46719.dart:34:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// self.A.n<String>.applyAndPrint(['three']);
// ^
+// pkg/front_end/testcases/general/issue46719.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/issue46719.dart:35:5: Error: Member not found: 'named'.
// A.named.toString();
// ^^^^^
//
-// pkg/front_end/testcases/general/issue46719.dart:36:4: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue46719.dart:36:4: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// A<int>.named.toString();
// ^
+// pkg/front_end/testcases/general/issue46719.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/issue46719.dart:36:10: Error: Member not found: 'named'.
// A<int>.named.toString();
diff --git a/pkg/front_end/testcases/general/issue48487.dart.weak.expect b/pkg/front_end/testcases/general/issue48487.dart.weak.expect
index 565652d..9b35946 100644
--- a/pkg/front_end/testcases/general/issue48487.dart.weak.expect
+++ b/pkg/front_end/testcases/general/issue48487.dart.weak.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/issue48487.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue48487.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// void test() {
// ^
+// pkg/front_end/testcases/general/issue48487.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/issue48487.dart.weak.modular.expect b/pkg/front_end/testcases/general/issue48487.dart.weak.modular.expect
index 565652d..9b35946 100644
--- a/pkg/front_end/testcases/general/issue48487.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/issue48487.dart.weak.modular.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/issue48487.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue48487.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// void test() {
// ^
+// pkg/front_end/testcases/general/issue48487.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/issue48487.dart.weak.outline.expect b/pkg/front_end/testcases/general/issue48487.dart.weak.outline.expect
index cbcf888..56e3e53 100644
--- a/pkg/front_end/testcases/general/issue48487.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/general/issue48487.dart.weak.outline.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/issue48487.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue48487.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// void test() {
// ^
+// pkg/front_end/testcases/general/issue48487.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/issue48487.dart.weak.transformed.expect b/pkg/front_end/testcases/general/issue48487.dart.weak.transformed.expect
index 565652d..9b35946 100644
--- a/pkg/front_end/testcases/general/issue48487.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/issue48487.dart.weak.transformed.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/issue48487.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue48487.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// void test() {
// ^
+// pkg/front_end/testcases/general/issue48487.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/issue48487b.dart.weak.expect b/pkg/front_end/testcases/general/issue48487b.dart.weak.expect
index 050d4dd..444b382 100644
--- a/pkg/front_end/testcases/general/issue48487b.dart.weak.expect
+++ b/pkg/front_end/testcases/general/issue48487b.dart.weak.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/issue48487b.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue48487b.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// const T.named();
// ^
+// pkg/front_end/testcases/general/issue48487b.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/issue48487b.dart.weak.modular.expect b/pkg/front_end/testcases/general/issue48487b.dart.weak.modular.expect
index 050d4dd..444b382 100644
--- a/pkg/front_end/testcases/general/issue48487b.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/issue48487b.dart.weak.modular.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/issue48487b.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue48487b.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// const T.named();
// ^
+// pkg/front_end/testcases/general/issue48487b.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/issue48487b.dart.weak.outline.expect b/pkg/front_end/testcases/general/issue48487b.dart.weak.outline.expect
index ef043fd..5c0a1c4 100644
--- a/pkg/front_end/testcases/general/issue48487b.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/general/issue48487b.dart.weak.outline.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/issue48487b.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue48487b.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// const T.named();
// ^
+// pkg/front_end/testcases/general/issue48487b.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/issue48487b.dart.weak.transformed.expect b/pkg/front_end/testcases/general/issue48487b.dart.weak.transformed.expect
index 050d4dd..444b382 100644
--- a/pkg/front_end/testcases/general/issue48487b.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/issue48487b.dart.weak.transformed.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/issue48487b.dart:9:3: Error: This requires the 'enhanced-enums' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/issue48487b.dart:9:3: Error: The 'enhanced-enums' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// const T.named();
// ^
+// pkg/front_end/testcases/general/issue48487b.dart:5:1: Context: This is the annotation that opts out this library from the 'enhanced-enums' language feature.
+// // @dart=2.16
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/macro_class.dart.weak.expect b/pkg/front_end/testcases/general/macro_class.dart.weak.expect
index 11f0500..59758e9 100644
--- a/pkg/front_end/testcases/general/macro_class.dart.weak.expect
+++ b/pkg/front_end/testcases/general/macro_class.dart.weak.expect
@@ -2,23 +2,23 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/macro_class.dart:8:1: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:8:1: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// macro class Class1 {}
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:9:10: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:9:10: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// abstract macro class Class2 {}
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:10:7: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:10:7: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// macro class Class3 = Super with Mixin;
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:11:16: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:11:16: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// abstract macro class Class4 = Super with Mixin;
// ^^^^^
//
diff --git a/pkg/front_end/testcases/general/macro_class.dart.weak.modular.expect b/pkg/front_end/testcases/general/macro_class.dart.weak.modular.expect
index 11f0500..59758e9 100644
--- a/pkg/front_end/testcases/general/macro_class.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/macro_class.dart.weak.modular.expect
@@ -2,23 +2,23 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/macro_class.dart:8:1: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:8:1: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// macro class Class1 {}
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:9:10: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:9:10: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// abstract macro class Class2 {}
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:10:7: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:10:7: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// macro class Class3 = Super with Mixin;
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:11:16: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:11:16: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// abstract macro class Class4 = Super with Mixin;
// ^^^^^
//
diff --git a/pkg/front_end/testcases/general/macro_class.dart.weak.outline.expect b/pkg/front_end/testcases/general/macro_class.dart.weak.outline.expect
index 96f69a5..f9bd2c2 100644
--- a/pkg/front_end/testcases/general/macro_class.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/general/macro_class.dart.weak.outline.expect
@@ -2,23 +2,23 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/macro_class.dart:8:1: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:8:1: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// macro class Class1 {}
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:9:10: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:9:10: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// abstract macro class Class2 {}
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:10:7: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:10:7: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// macro class Class3 = Super with Mixin;
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:11:16: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:11:16: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// abstract macro class Class4 = Super with Mixin;
// ^^^^^
//
diff --git a/pkg/front_end/testcases/general/macro_class.dart.weak.transformed.expect b/pkg/front_end/testcases/general/macro_class.dart.weak.transformed.expect
index 248efad..f8d864b 100644
--- a/pkg/front_end/testcases/general/macro_class.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/macro_class.dart.weak.transformed.expect
@@ -2,23 +2,23 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/general/macro_class.dart:8:1: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:8:1: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// macro class Class1 {}
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:9:10: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:9:10: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// abstract macro class Class2 {}
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:10:7: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:10:7: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// macro class Class3 = Super with Mixin;
// ^^^^^
//
-// pkg/front_end/testcases/general/macro_class.dart:11:16: Error: This requires the 'macros' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/macro_class.dart:11:16: Error: This requires the experimental 'macros' language feature to be enabled.
+// Try passing the '--enable-experiment=macros' command line option.
// abstract macro class Class4 = Super with Mixin;
// ^^^^^
//
diff --git a/pkg/front_end/testcases/general/new_as_selector.dart.weak.expect b/pkg/front_end/testcases/general/new_as_selector.dart.weak.expect
index 01083e9..45d5195 100644
--- a/pkg/front_end/testcases/general/new_as_selector.dart.weak.expect
+++ b/pkg/front_end/testcases/general/new_as_selector.dart.weak.expect
@@ -12,211 +12,322 @@
// int new = 42; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:19:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:19:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C() : super.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:20:20: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:20:20: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.named() : this.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:31:16: Error: 'new' can't be used as an identifier because it's a keyword.
// Try renaming this to be an identifier that isn't a keyword.
// external int new; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:23:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:23:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:24:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:24:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:25:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:25:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:26:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:26:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new = 87; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:39:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:39:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// new C().new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:40:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:40:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// new C().new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:41:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:41:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// new C().new = 87; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:43:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:43:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// c.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:44:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:44:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// c.new = 87; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:46:7: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:46:7: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:47:7: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:47:7: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:48:7: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:48:7: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:49:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:49:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo?.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:50:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:50:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo?.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:51:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:51:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo?.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:52:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:52:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo..new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:53:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:53:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo..new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:54:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:54:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo..new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:55:9: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:55:9: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// (foo).new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:56:9: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:56:9: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// (foo).new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:57:9: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:57:9: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// (foo).new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:58:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:58:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix1.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:59:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:59:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix1.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:60:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:60:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix1.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:61:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:61:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix2.c.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:62:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:62:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix2.c.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:63:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:63:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix2.c.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:64:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:64:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// E(0).new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:65:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:65:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// E(0).new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:66:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:66:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// E(0).new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:67:14: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:67:14: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// unresolved.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:67:3: Error: Undefined name 'unresolved'.
// unresolved.new; // error
// ^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:68:14: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:68:14: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// unresolved.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:68:3: Error: Undefined name 'unresolved'.
// unresolved.new(); // error
// ^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:69:14: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:69:14: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// unresolved.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:69:3: Error: Undefined name 'unresolved'.
// unresolved.new<int>(); // error
// ^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:70:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:70:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:70:5: Error: Member not found: 'new'.
// C.new; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:71:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:71:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/new_as_selector.dart.weak.modular.expect b/pkg/front_end/testcases/general/new_as_selector.dart.weak.modular.expect
index 01083e9..45d5195 100644
--- a/pkg/front_end/testcases/general/new_as_selector.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/general/new_as_selector.dart.weak.modular.expect
@@ -12,211 +12,322 @@
// int new = 42; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:19:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:19:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C() : super.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:20:20: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:20:20: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.named() : this.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:31:16: Error: 'new' can't be used as an identifier because it's a keyword.
// Try renaming this to be an identifier that isn't a keyword.
// external int new; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:23:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:23:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:24:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:24:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:25:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:25:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:26:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:26:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new = 87; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:39:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:39:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// new C().new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:40:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:40:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// new C().new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:41:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:41:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// new C().new = 87; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:43:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:43:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// c.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:44:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:44:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// c.new = 87; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:46:7: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:46:7: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:47:7: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:47:7: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:48:7: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:48:7: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:49:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:49:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo?.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:50:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:50:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo?.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:51:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:51:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo?.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:52:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:52:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo..new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:53:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:53:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo..new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:54:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:54:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo..new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:55:9: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:55:9: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// (foo).new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:56:9: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:56:9: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// (foo).new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:57:9: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:57:9: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// (foo).new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:58:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:58:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix1.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:59:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:59:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix1.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:60:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:60:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix1.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:61:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:61:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix2.c.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:62:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:62:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix2.c.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:63:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:63:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix2.c.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:64:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:64:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// E(0).new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:65:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:65:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// E(0).new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:66:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:66:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// E(0).new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:67:14: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:67:14: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// unresolved.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:67:3: Error: Undefined name 'unresolved'.
// unresolved.new; // error
// ^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:68:14: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:68:14: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// unresolved.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:68:3: Error: Undefined name 'unresolved'.
// unresolved.new(); // error
// ^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:69:14: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:69:14: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// unresolved.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:69:3: Error: Undefined name 'unresolved'.
// unresolved.new<int>(); // error
// ^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:70:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:70:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:70:5: Error: Member not found: 'new'.
// C.new; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:71:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:71:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/general/new_as_selector.dart.weak.outline.expect b/pkg/front_end/testcases/general/new_as_selector.dart.weak.outline.expect
index 6772b34..2524607 100644
--- a/pkg/front_end/testcases/general/new_as_selector.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/general/new_as_selector.dart.weak.outline.expect
@@ -12,15 +12,21 @@
// int new = 42; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:19:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:19:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C() : super.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:20:20: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:20:20: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.named() : this.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:31:16: Error: 'new' can't be used as an identifier because it's a keyword.
// Try renaming this to be an identifier that isn't a keyword.
diff --git a/pkg/front_end/testcases/general/new_as_selector.dart.weak.transformed.expect b/pkg/front_end/testcases/general/new_as_selector.dart.weak.transformed.expect
index 0ecdf2a..b831757 100644
--- a/pkg/front_end/testcases/general/new_as_selector.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/general/new_as_selector.dart.weak.transformed.expect
@@ -12,211 +12,322 @@
// int new = 42; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:19:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:19:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C() : super.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:20:20: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:20:20: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.named() : this.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:31:16: Error: 'new' can't be used as an identifier because it's a keyword.
// Try renaming this to be an identifier that isn't a keyword.
// external int new; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:23:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:23:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:24:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:24:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:25:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:25:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:26:10: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:26:10: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// this.new = 87; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:39:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:39:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// new C().new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:40:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:40:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// new C().new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:41:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:41:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// new C().new = 87; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:43:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:43:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// c.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:44:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:44:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// c.new = 87; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:46:7: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:46:7: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:47:7: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:47:7: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:48:7: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:48:7: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:49:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:49:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo?.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:50:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:50:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo?.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:51:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:51:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo?.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:52:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:52:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo..new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:53:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:53:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo..new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:54:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:54:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// foo..new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:55:9: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:55:9: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// (foo).new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:56:9: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:56:9: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// (foo).new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:57:9: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:57:9: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// (foo).new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:58:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:58:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix1.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:59:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:59:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix1.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:60:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:60:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix1.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:61:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:61:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix2.c.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:62:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:62:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix2.c.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:63:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:63:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// prefix2.c.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:64:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:64:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// E(0).new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:65:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:65:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// E(0).new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:66:8: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:66:8: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// E(0).new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:67:14: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:67:14: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// unresolved.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:67:3: Error: Undefined name 'unresolved'.
// unresolved.new; // error
// ^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:68:14: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:68:14: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// unresolved.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:68:3: Error: Undefined name 'unresolved'.
// unresolved.new(); // error
// ^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:69:14: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:69:14: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// unresolved.new<int>(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:69:3: Error: Undefined name 'unresolved'.
// unresolved.new<int>(); // error
// ^^^^^^^^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:70:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:70:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.new; // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/general/new_as_selector.dart:70:5: Error: Member not found: 'new'.
// C.new; // error
// ^^^
//
-// pkg/front_end/testcases/general/new_as_selector.dart:71:5: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/general/new_as_selector.dart:71:5: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// C.new(); // error
// ^^^
+// pkg/front_end/testcases/general/new_as_selector.dart:5:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.14
+// ^^^^^^^^^^^^^
//
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.weak.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.expect
index 14f27fa..cc03693 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var v = (f<dynamic>)/*@typeArgs=int**/(/*@returnType=int**/() {
// ^
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
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.weak.modular.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.modular.expect
index 14f27fa..cc03693 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.modular.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var v = (f<dynamic>)/*@typeArgs=int**/(/*@returnType=int**/() {
// ^
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
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.weak.outline.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.outline.expect
index 2fae640..a1a2465 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.outline.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var v = (f<dynamic>)/*@typeArgs=int**/(/*@returnType=int**/() {
// ^
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
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.weak.transformed.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.transformed.expect
index ede8dae..de03af4 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart.weak.transformed.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:9:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var v = (f<dynamic>)/*@typeArgs=int**/(/*@returnType=int**/() {
// ^
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_dynamic_param_via_expr1.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
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.weak.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.expect
index 1d604ce..9bf3b40 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var v = (f<int>)/*@typeArgs=int**/(/*@returnType=int**/() {
// ^
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
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.weak.modular.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.modular.expect
index 1d604ce..9bf3b40 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.modular.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var v = (f<int>)/*@typeArgs=int**/(/*@returnType=int**/() {
// ^
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
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.weak.outline.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.outline.expect
index 3275c50..229b708 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.outline.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var v = (f<int>)/*@typeArgs=int**/(/*@returnType=int**/() {
// ^
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
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.weak.transformed.expect b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.transformed.expect
index 621f372..d7ccceb 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart.weak.transformed.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:11: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:9:11: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var v = (f<int>)/*@typeArgs=int**/(/*@returnType=int**/() {
// ^
+// pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr1.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/regress/issue_31188.dart.weak.expect b/pkg/front_end/testcases/regress/issue_31188.dart.weak.expect
index bc17959..6917875 100644
--- a/pkg/front_end/testcases/regress/issue_31188.dart.weak.expect
+++ b/pkg/front_end/testcases/regress/issue_31188.dart.weak.expect
@@ -22,10 +22,13 @@
// type T = Map<A, B>
// ^
//
-// pkg/front_end/testcases/regress/issue_31188.dart:7:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_31188.dart:7:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// type T = Map<A, B>
// ^
+// pkg/front_end/testcases/regress/issue_31188.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/regress/issue_31188.dart.weak.modular.expect b/pkg/front_end/testcases/regress/issue_31188.dart.weak.modular.expect
index bc17959..6917875 100644
--- a/pkg/front_end/testcases/regress/issue_31188.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/regress/issue_31188.dart.weak.modular.expect
@@ -22,10 +22,13 @@
// type T = Map<A, B>
// ^
//
-// pkg/front_end/testcases/regress/issue_31188.dart:7:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_31188.dart:7:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// type T = Map<A, B>
// ^
+// pkg/front_end/testcases/regress/issue_31188.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/regress/issue_31188.dart.weak.transformed.expect b/pkg/front_end/testcases/regress/issue_31188.dart.weak.transformed.expect
index bc17959..6917875 100644
--- a/pkg/front_end/testcases/regress/issue_31188.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_31188.dart.weak.transformed.expect
@@ -22,10 +22,13 @@
// type T = Map<A, B>
// ^
//
-// pkg/front_end/testcases/regress/issue_31188.dart:7:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_31188.dart:7:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// type T = Map<A, B>
// ^
+// pkg/front_end/testcases/regress/issue_31188.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/regress/issue_34403.dart.weak.expect b/pkg/front_end/testcases/regress/issue_34403.dart.weak.expect
index cb1b2fd..a31d72a 100644
--- a/pkg/front_end/testcases/regress/issue_34403.dart.weak.expect
+++ b/pkg/front_end/testcases/regress/issue_34403.dart.weak.expect
@@ -12,10 +12,13 @@
// var c2 = new C.bar<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:20:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:20:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var c3 = C<String>.bar<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:20:22: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -37,10 +40,13 @@
// const d2 = const D.foo<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:29:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:29:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const d3 = D<String>.foo<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:29:24: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -62,10 +68,13 @@
// var e2 = new p.E.bar<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:38:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:38:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var e3 = p.E<String>.bar<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:38:24: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -87,10 +96,13 @@
// const f2 = const p.F.foo<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:47:17: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:47:17: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const f3 = p.F<String>.foo<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:47:26: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
diff --git a/pkg/front_end/testcases/regress/issue_34403.dart.weak.modular.expect b/pkg/front_end/testcases/regress/issue_34403.dart.weak.modular.expect
index cb1b2fd..a31d72a 100644
--- a/pkg/front_end/testcases/regress/issue_34403.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/regress/issue_34403.dart.weak.modular.expect
@@ -12,10 +12,13 @@
// var c2 = new C.bar<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:20:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:20:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var c3 = C<String>.bar<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:20:22: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -37,10 +40,13 @@
// const d2 = const D.foo<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:29:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:29:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const d3 = D<String>.foo<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:29:24: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -62,10 +68,13 @@
// var e2 = new p.E.bar<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:38:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:38:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var e3 = p.E<String>.bar<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:38:24: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -87,10 +96,13 @@
// const f2 = const p.F.foo<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:47:17: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:47:17: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const f3 = p.F<String>.foo<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:47:26: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
diff --git a/pkg/front_end/testcases/regress/issue_34403.dart.weak.transformed.expect b/pkg/front_end/testcases/regress/issue_34403.dart.weak.transformed.expect
index cb1b2fd..a31d72a 100644
--- a/pkg/front_end/testcases/regress/issue_34403.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/regress/issue_34403.dart.weak.transformed.expect
@@ -12,10 +12,13 @@
// var c2 = new C.bar<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:20:13: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:20:13: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var c3 = C<String>.bar<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:20:22: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -37,10 +40,13 @@
// const d2 = const D.foo<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:29:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:29:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const d3 = D<String>.foo<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:29:24: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -62,10 +68,13 @@
// var e2 = new p.E.bar<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:38:15: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:38:15: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// var e3 = p.E<String>.bar<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:38:24: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
@@ -87,10 +96,13 @@
// const f2 = const p.F.foo<int>();
// ^^^
//
-// pkg/front_end/testcases/regress/issue_34403.dart:47:17: Error: This requires the 'constructor-tearoffs' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15 or higher, and running 'pub get'.
+// pkg/front_end/testcases/regress/issue_34403.dart:47:17: Error: The 'constructor-tearoffs' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.15 or higher.
// const f3 = p.F<String>.foo<int>();
// ^
+// pkg/front_end/testcases/regress/issue_34403.dart:4:1: Context: This is the annotation that opts out this library from the 'constructor-tearoffs' language feature.
+// // @dart=2.9
+// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/regress/issue_34403.dart:47:26: Error: A constructor invocation can't have type arguments after the constructor name.
// Try removing the type arguments or placing them after the class name.
diff --git a/pkg/front_end/testcases/super_parameters/opt_out.dart.strong.expect b/pkg/front_end/testcases/super_parameters/opt_out.dart.strong.expect
index ba9102f..01b7cb5 100644
--- a/pkg/front_end/testcases/super_parameters/opt_out.dart.strong.expect
+++ b/pkg/front_end/testcases/super_parameters/opt_out.dart.strong.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: This requires the 'super-parameters' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: The 'super-parameters' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// B(super.field);
// ^^^^^
+// pkg/front_end/testcases/super_parameters/opt_out.dart:5:1: Context: This is the annotation that opts out this library from the 'super-parameters' language feature.
+// // @dart=2.15
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/super_parameters/opt_out.dart:14:3: Error: The superclass, 'A', has no unnamed constructor that takes no arguments.
// B(super.field);
diff --git a/pkg/front_end/testcases/super_parameters/opt_out.dart.strong.transformed.expect b/pkg/front_end/testcases/super_parameters/opt_out.dart.strong.transformed.expect
index ba9102f..01b7cb5 100644
--- a/pkg/front_end/testcases/super_parameters/opt_out.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/super_parameters/opt_out.dart.strong.transformed.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: This requires the 'super-parameters' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: The 'super-parameters' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// B(super.field);
// ^^^^^
+// pkg/front_end/testcases/super_parameters/opt_out.dart:5:1: Context: This is the annotation that opts out this library from the 'super-parameters' language feature.
+// // @dart=2.15
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/super_parameters/opt_out.dart:14:3: Error: The superclass, 'A', has no unnamed constructor that takes no arguments.
// B(super.field);
diff --git a/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.expect b/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.expect
index ba9102f..01b7cb5 100644
--- a/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.expect
+++ b/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: This requires the 'super-parameters' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: The 'super-parameters' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// B(super.field);
// ^^^^^
+// pkg/front_end/testcases/super_parameters/opt_out.dart:5:1: Context: This is the annotation that opts out this library from the 'super-parameters' language feature.
+// // @dart=2.15
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/super_parameters/opt_out.dart:14:3: Error: The superclass, 'A', has no unnamed constructor that takes no arguments.
// B(super.field);
diff --git a/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.modular.expect b/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.modular.expect
index ba9102f..01b7cb5 100644
--- a/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.modular.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: This requires the 'super-parameters' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: The 'super-parameters' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// B(super.field);
// ^^^^^
+// pkg/front_end/testcases/super_parameters/opt_out.dart:5:1: Context: This is the annotation that opts out this library from the 'super-parameters' language feature.
+// // @dart=2.15
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/super_parameters/opt_out.dart:14:3: Error: The superclass, 'A', has no unnamed constructor that takes no arguments.
// B(super.field);
diff --git a/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.outline.expect b/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.outline.expect
index 7990170..5ee0fad 100644
--- a/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.outline.expect
+++ b/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.outline.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: This requires the 'super-parameters' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: The 'super-parameters' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// B(super.field);
// ^^^^^
+// pkg/front_end/testcases/super_parameters/opt_out.dart:5:1: Context: This is the annotation that opts out this library from the 'super-parameters' language feature.
+// // @dart=2.15
+// ^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
diff --git a/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.transformed.expect b/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.transformed.expect
index ba9102f..01b7cb5 100644
--- a/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/super_parameters/opt_out.dart.weak.transformed.expect
@@ -2,10 +2,13 @@
//
// Problems in library:
//
-// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: This requires the 'super-parameters' language feature to be enabled.
-// Try updating your pubspec.yaml to set the minimum SDK constraint to 2.17 or higher, and running 'pub get'.
+// pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: The 'super-parameters' language feature is disabled for this library.
+// Try removing the `@dart=` annotation or setting the language version to 2.17 or higher.
// B(super.field);
// ^^^^^
+// pkg/front_end/testcases/super_parameters/opt_out.dart:5:1: Context: This is the annotation that opts out this library from the 'super-parameters' language feature.
+// // @dart=2.15
+// ^^^^^^^^^^^^^
//
// pkg/front_end/testcases/super_parameters/opt_out.dart:14:3: Error: The superclass, 'A', has no unnamed constructor that takes no arguments.
// B(super.field);
diff --git a/tests/language_2/constructor/reference_test.dart b/tests/language_2/constructor/reference_test.dart
index 738d450..72d1b40 100644
--- a/tests/language_2/constructor/reference_test.dart
+++ b/tests/language_2/constructor/reference_test.dart
@@ -91,7 +91,7 @@
Foo<int>.bar.baz();
// ^^^^^
// [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED
- // [cfe] This requires the 'constructor-tearoffs' language feature to be enabled.
+ // [cfe] The 'constructor-tearoffs' language feature is disabled for this library.
// ^
// [cfe] Member not found: 'bar'.
// ^^^
