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, 16 insertions, 0 deletions

diff --git a/deps/v8/test/mjsunit/regress/regress-786573.js b/deps/v8/test/mjsunit/regress/regress-786573.js
new file mode 100644
index 0000000000..a7d5f37e75
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-786573.js
@@ -0,0 +1,16 @@
+// 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.
+
+let cnt = 0;
+let reg = /./g;
+reg.exec = () => {
+  // Note: it's still possible to trigger OOM by passing huge values here, since
+  // the spec requires building a list of all captures in
+  // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@replace
+  if (cnt++ == 0) return {length: 2 ** 16};
+  cnt = 0;
+  return null;
+};
+
+assertThrows(() => ''.replace(reg, () => {}), RangeError);