// 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;
  }
}
