/*
 * 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 Dart supports two levels of privacy: public and private.
 * A declaration is private iff its name begins with an underscore (the _ character) 
 * otherwise it is public.
 * A declaration m is accessible to library L if m is declared in L or if m is public.
 * @description Checks that label names can begin with an underscore and are still usable.
 * @author iefremov
 * @reviewer rodionov
 */


main() {
  _: {
    break _;
    throw 1;
  }
}