Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/test/mjsunit/regress/regress-507980.js b/test/mjsunit/regress/regress-507980.js
new file mode 100644
index 0000000..d1a1f79
--- /dev/null
+++ b/test/mjsunit/regress/regress-507980.js
@@ -0,0 +1,8 @@
+// Copyright 2015 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.
+
+__v_1 = new Float64Array(1);
+__v_8 = { valueOf: function() { __v_13.y = "bar"; return 42; }};
+__v_13 = __v_1;
+__v_13[0] = __v_8;