diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/for-of/arguments-7.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/for-of/arguments-7.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+// Changing arguments.length during a for-of loop iterating over arguments affects the loop.
+
+load(libdir + "iteration.js");
+
+Object.prototype[std_iterator] = Array.prototype[std_iterator];
+
+var s;
+function f() {
+    for (var v of arguments) {
+        s += v;
+        arguments.length--;
+    }
+}
+
+s = '';
+f('a', 'b', 'c', 'd', 'e');
+assertEq(s, 'abc');