diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_7/extensions/regress-589112.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_7/extensions/regress-589112.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+
+f = eval("(function(){return x=Iterator(/x/)})")
+for (a in f()) {}
+for (d in x) {}
+
+reportCompare(0, 0, "");