[builtins] treat all elements of detached TypedArray as undefined in A.p.includes

test/mjsunit/es7/regress/regress-691323-includes-typedarray.js

Index: test/mjsunit/es7/regress/regress-691323-includes-typedarray.js
diff --git a/test/mjsunit/es7/regress/regress-691323-includes-typedarray.js b/test/mjsunit/es7/regress/regress-691323-includes-typedarray.js
new file mode 100644
index 0000000000000000000000000000000000000000..6cd476c08a7e9ef28564dca17eecc9ee374c489a
--- /dev/null
+++ b/test/mjsunit/es7/regress/regress-691323-includes-typedarray.js
@@ -0,0 +1,15 @@
+// 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 buf = new ArrayBuffer(0x10000);
+var arr = new Uint8Array(buf).fill(55);
+var tmp = {};
+tmp[Symbol.toPrimitive] = function () {
+  %ArrayBufferNeuter(arr.buffer)
+  return 0;
+};
+
+assertTrue(Array.prototype.includes.call(arr, undefined, tmp));