diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug773927.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug773927.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+function outer() {
+    (function() {x})
+    assertEq(((function() {return x}) for (x in [42])).next()(), "0");
+    var x;
+}
+outer();