diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/arguments/genexpr-6.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/arguments/genexpr-6.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+// 'arguments' works in nested genexprs.
+
+function f() {
+    return ((((((arguments for (u of [0]))
+                for (v of [1]))
+               for (w of [2]))
+              for (x of [3]))
+             for (y of [4]))
+            for (z of [5]));
+}
+var args = f("ponies").next().next().next().next().next().next();
+assertEq(args[0], "ponies");