| // 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. | |
| // @dart = 2.9 | |
| class /*@compile-error=unspecified*/ A<X extends B> {} | |
| class /*@compile-error=unspecified*/ B<X extends C> {} | |
| class /*@compile-error=unspecified*/ C<X extends A<B>> {} | |
| main() {} |