commit da12d29b40bc9ac10bcdeb5696b69c3ed0d3133f
author Ben Murdoch <benm@google.com> Thu Jun 02 14:46:10 2016 +0100
committer Dirk Vogt <dirk@fairphone.com> Fri Mar 17 16:06:11 2017 +0100
tree f11e06aa13d44d9524519b744c8a645b7578ffd9
parent 097c5b25f8b57b92e6c94f25383a883ff242344f

Upgrade V8 to 5.1.281.57  DO NOT MERGE

FPIIM-449

Change-Id: Id981b686b4d587ac31697662eb98bb34be42ad90
(cherry picked from commit 3b9bc31999c9787eb726ecdbfd5796bfdec32a18)

src/js/string-iterator.js

diff --git a/src/js/string-iterator.js b/src/js/string-iterator.js
index 3c331dd..af9af31 100644
--- a/src/js/string-iterator.js
+++ b/src/js/string-iterator.js
@@ -32,6 +32,7 @@
 
 // 21.1.5.1 CreateStringIterator Abstract Operation
 function CreateStringIterator(string) {
+  CHECK_OBJECT_COERCIBLE(string, 'String.prototype[Symbol.iterator]');
   var s = TO_STRING(string);
   var iterator = new StringIterator;
   SET_PRIVATE(iterator, stringIteratorIteratedStringSymbol, s);