| // 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. | |
| /// @description Regression test for issue 33421 (Dart does not throw error when | |
| /// type parameter is a supertype of its upper bound): checks that type parameter | |
| /// cannot extend itself | |
| /// @compile-error | |
| /// @Issue 33421 | |
| /// @author iarkh@unipro.ru | |
| class A<X extends X> {} | |
| main() {} |