// Copyright (c) 2019, 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.

/// @assertion Any use of a type `T` which is not well-bounded is a
/// compile-time error.
///
/// @description Checks that it is not an error to declare a type alias for a
/// function type with a type parameter whose bound is well-bounded.
/// @Issue 36959, 37050, 42415
/// @author iarkh@unipro.ru

class A<T extends A<T>> {}

typedef B<X extends A<X>> = X Function(X);

main() {
  B<A> b2;
  B<void> b4;
  B<Never> b5;

  B<A<dynamic>> b6;
  B<A<void>> b8;
  B<A<Never>> b9;
}