diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/arguments/args-mochi.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/arguments/args-mochi.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+actual = '';
+expected = 'true,';
+
+var isNotEmpty = function (obj) {
+  for (var i = 0; i < arguments.length; i++) {
+    var o = arguments[i];
+    if (!(o && o.length)) {
+      return false;
+    }
+  }
+  return true;
+};
+
+appendToActual(isNotEmpty([1], [1], [1], "asdf", [1]));
+
+
+assertEq(actual, expected)