// 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 })();
})();