diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug790629-4.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug790629-4.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+// 'this' in a generator-expression non-strict function produces the expected
+// object.
+
+Number.prototype.iters = function () {
+    return [(this for (x of [0])),
+            (this for (y of [0]))];
+};
+
+var [a, b] = (3).iters();
+var three = a.next();
+assertEq(Object.prototype.toString.call(three), '[object Number]');
+assertEq(+three, 3);
+assertEq(b.next(), three);