diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug701239.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug701239.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,1 @@
+(function f(w) { for([w] in 1) {} }).toString();