// 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

/// @description Regression test for issue 33421 (Dart does not throw error when
/// type parameter is a supertype of its upper bound): Checks that class cannot
/// extend itself.
/// @Issue 33421
/// @author iarkh@unipro.ru

class C extends C {}
//    ^
// [analyzer] unspecified
// [cfe] unspecified
main() {}