// 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 If a declaration d named n is in the namespace induced by a 
/// scope S, then d hides any declaration named n that is available in the 
/// lexically enclosing scope of S.
/// @description Checks that a name in the scope of a for statement can hide a 
/// name from a lexically enclosing scope and that does not produce a static 
/// warning.
/// @author msyabro


main() {
  var x;
  for (int i = 0; i < 2; ++i) {
    var x = i;
  }
}
