diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Frame-arguments-07.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Frame-arguments-07.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+// When argument[x] is assigned, where x > callee.length, frame.arguments reflects the change.
+
+var g = newGlobal();
+g.eval("function f(a, b) {\n" +
+       "    for (var i = 0; i < arguments.length; i++)\n" +
+       "        arguments[i] = i;\n" +
+       "    debugger;\n" +
+       "}\n");
+
+var dbg = Debugger(g);
+var hits = 0;
+dbg.onDebuggerStatement = function (frame) {
+    var argc = frame.eval("arguments.length").return;
+    var args = frame.arguments;
+    assertEq(args.length, argc);
+    for (var i = 0; i < argc; i++)
+        assertEq(args[i], i);
+    hits++;
+}
+
+g.f(9);
+g.f(9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9);
+assertEq(hits, 2);