// Copyright (c) 2015, 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 It is a compile-time error for a class to attempt to extend,
 * mix in or implement String.
 * @description Checks that String cannot be mixed in abstract class
 * @compile-error
 * @author sgrekhov@unipro.ru
 */
class A {}

abstract class C extends A with String {}

main() {
  C? c = null;
}