/*
 * Copyright (c) 2011, 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 or
 * implement double.
 * @description Checks that a user-defined class cannot extend double.
 * @compile-error
 * @author iefremov
 * @reviewer rodionov
 */

class A extends double {}

main() {
  try {
    new A();
  } catch(x) {}
}