// Copyright 2018 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./* Test behaviors when the prototype has elements */// map(function(){vararray=[,];functionmap(){returnarray.map(x=>x+1);}assertEquals(map(),[,]);array.__proto__.push(5);varnarr=map();assertNotEquals(Object.getOwnPropertyDescriptor(narr,0),undefined);assertEquals(narr[0],6);})();