diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/for-of/arguments-6.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/for-of/arguments-6.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+// Changing arguments.length affects a for-of loop iterating over arguments.
+
+load(libdir + "iteration.js");
+
+Object.prototype[std_iterator] = Array.prototype[std_iterator];
+
+var s;
+function f() {
+    arguments.length = 2;
+    for (var v of arguments)
+        s += v;
+}
+
+s = '';
+f('a', 'b', 'c', 'd', 'e');
+assertEq(s, 'ab');