dart-sdk/tests/web/rti_need_for_runtime_type_test.dart

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// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// User-facing regression test: ensure we correctly record when a closure needs
/// runtime type information for a type parameter that may be used or
/// .runtimeType.
class A<T> {
final f;
A() : f = (() => new C<T>());
}
class C<T> {}
main() => print(new A<int>().f().runtimeType);