/*
 * 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 double.
 * @description Checks that double cannot be mixed in abstract class
 * @compile-error
 * @author sgrekhov@unipro.ru
 */

class A {}

abstract class C extends A with double {}

main() {
  C? c = null;
}