deps: update V8 to 6.4.388.40

PR-URL: https://github.com/nodejs/node/pull/17489
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-781506-3.js b/deps/v8/test/mjsunit/regress/regress-crbug-781506-3.js
new file mode 100644
index 0000000000..70b29896f7
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-781506-3.js
@@ -0,0 +1,13 @@
+// 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
+
+function foo(a, i) { return a[i] + 0.5; }
+
+foo({}, 1);
+Array.prototype.unshift(1.5);
+assertTrue(Number.isNaN(foo({}, 1)));
+%OptimizeFunctionOnNextCall(foo);
+assertTrue(Number.isNaN(foo({}, 1)));