diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/arguments/args-mutate-length-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/arguments/args-mutate-length-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+actual = '';
+expected = '0,0,0,';
+
+function f() {
+  arguments.length--;
+  for (var i = 0; i < arguments.length; ++i) {
+    appendToActual(i);
+  }
+}
+
+f(1, 2);
+f(1, 2);
+f(2, 2);
+
+
+assertEq(actual, expected)