diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/arguments/genexpr-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/arguments/genexpr-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+// No 'arguments' binding in genexprs at toplevel.
+
+load(libdir + "asserts.js");
+
+delete this.arguments;  // it is defined in the shell
+var iter = (arguments for (x of [1]));
+assertThrowsInstanceOf(() => iter.next(), ReferenceError);