// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.


(function(a = 0){
  var x;  // allocated in a var block, due to use of default parameter
  (function() { return !x })();
})();

(function({a}){
  var x;  // allocated in a var block, due to use of parameter destructuring
  (function() { return !x })();
})({});

(function(...a){
  var x;  // allocated in a var block, due to use of rest parameter
  (function() { return !x })();
})();