// 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 is private, otherwise it is public.
/// A name q is private iff any one of the identifiers that comprise q is 
/// private, otherwise it is public.
/// An identifier is private iff it 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


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