diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/arguments/defaults-bug790424.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/arguments/defaults-bug790424.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,4 @@
+function f1(g=((function () { return 4; }) for (x of [1]))) {
+  return g.next()();
+}
+assertEq(f1(), 4);