Merged: [elements] Check if the backing store has been neutered for indexOf

test/mjsunit/regress/regress-crbug-691323.js

+// Copyright 2017 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.
+
+// Flags: --allow-natives-syntax
+var buffer = new ArrayBuffer(0x100);
+var array = new Uint8Array(buffer).fill(55);
+var tmp = {};
+tmp[Symbol.toPrimitive] = function () {
+  %ArrayBufferNeuter(array.buffer)
+  return 0;
+};
+
+
+assertEquals(-1, Array.prototype.indexOf.call(array, 0x00, tmp));
+
+buffer = new ArrayBuffer(0x100);
+array = new Uint8Array(buffer).fill(55);
+tmp = {};
+tmp[Symbol.toPrimitive] = function () {
+  %ArrayBufferNeuter(array.buffer)
+  return 0;
+};
+
+
+assertEquals(false, Array.prototype.includes.call(array, 0x00, tmp));
+
+buffer = new ArrayBuffer(0x100);
+array = new Uint8Array(buffer).fill(55);
+tmp = {};
+tmp[Symbol.toPrimitive] = function () {
+  %ArrayBufferNeuter(array.buffer)
+  return 0;
+};
+assertEquals(true, Array.prototype.includes.call(array, undefined, tmp));