library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd_mixed/opt_out.dart:16:11: Error: Can't create typedef from nullable type.
// typedef F = void Function()?;
//           ^
//
import self as self;
import "dart:core" as core;

import "org-dartlang-testcase:///opt_out_lib.dart";

typedef F = invalid-type;
class A<T extends core::Object? = dynamic> extends core::Object {
  late field core::int field = 42;
  synthetic constructor •() → self::A<self::A::T%>
    : super core::Object::•()
    ;
}
class B extends self::A<core::String?> {
  synthetic constructor •() → self::B
    : super self::A::•()
    ;
}
static field core::List<core::String?> l = <core::String?>[];
static field core::String? s = null;
static field core::String t = self::s!;
late static field core::int field = 42;
static method method(() →? void f, {required core::int a = #C1}) → void {}
static method main() → dynamic {}
static method noErrors() → dynamic {
  late core::int local = 42;
  core::String? s = null;
  dynamic c;
  let final dynamic #t1 = c in #t1.{core::Object::==}(null) ?{dynamic} null : block {
    #t1.f;
  } =>#t1;
  let final dynamic #t2 = c in #t2.{core::Object::==}(null) ?{dynamic} null : #t2.[](0);
}

library;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:18:25: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
// class B extends A<String?> {}
//                         ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:20:28: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
// typedef F = void Function()?;
//                            ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:22:12: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
// List<String?> l = [];
//            ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:23:7: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
// String? s = null;
//       ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:28:21: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
// void method(void f()?, {int a}) {}
//                     ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:24:10: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
// var t = s!;
//          ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:32:14: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
//   List<String?> l = null;
//              ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:33:9: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
//   String? s = null;
//         ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:34:12: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
//   var t = s!;
//            ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:36:6: Error: Expected an identifier, but got '.'.
// Try inserting an identifier before '.'.
//   c?..f;
//      ^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:36:6: Error: Expected an identifier, but got ''.
// Try inserting an identifier before ''.
//   c?..f;
//      ^
//
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:37:5: Error: Null safety features are disabled for this library.
// Try removing the `@dart=` annotation or setting the language version to 2.10 or higher.
//   c?[0];
//     ^
// pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:5:1: Context: This is the annotation that opts out this library from null safety features.
// // @dart=2.5
// ^^^^^^^^^^^^
//
import self as self2;
import "dart:core" as core;

typedef F = () →? void;
class A<T extends core::Object* = dynamic> extends core::Object {
  field core::int* field = 42;
  synthetic constructor •() → self2::A<self2::A::T*>*
    : super core::Object::•()
    ;
  abstract member-signature get _identityHashCode() → core::int*; -> core::Object::_identityHashCode
  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*; -> core::Object::_instanceOf
  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOf
  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfTrue
  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*; -> core::Object::_simpleInstanceOfFalse
  abstract member-signature operator ==(dynamic other) → core::bool*; -> core::Object::==
  abstract member-signature get hashCode() → core::int*; -> core::Object::hashCode
  abstract member-signature method toString() → core::String*; -> core::Object::toString
  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic; -> core::Object::noSuchMethod
  abstract member-signature get runtimeType() → core::Type*; -> core::Object::runtimeType
}
class B extends self2::A<core::String?> {
  synthetic constructor •() → self2::B*
    : super self2::A::•()
    ;
}
static field core::List<core::String?>* l = <core::String*>[];
static field core::String? s = null;
static field core::String* t = self2::s!;
static field core::int* field = 42;
static method method(() →? void f, {core::int* a = #C1}) → void {}
static method errors() → dynamic {
  core::int* local = 42;
  core::List<core::String?>* l = null;
  core::String? s = null;
  core::String* t = s!;
  dynamic c;
  invalid-expression "pkg/front_end/testcases/nnbd_mixed/opt_out_lib.dart:36:6: Error: Expected an identifier, but got ''.
Try inserting an identifier before ''.
  c?..f;
     ^".f;
  let final dynamic #t3 = c in #t3.{core::Object::==}(null) ?{dynamic} null : #t3.[](0);
}

constants  {
  #C1 = null
}