diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Frame-eval-08.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Frame-eval-08.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+// The arguments can escape from a function via a debugging hook.
+
+var g = newGlobal();
+var dbg = new Debugger(g);
+
+// capture arguments object and test function
+var args, testfn;
+dbg.onDebuggerStatement = function (frame) {
+    args = frame.eval("arguments").return;
+    testfn = frame.eval("test").return;
+};
+g.eval("function f() { debugger; }");
+g.eval("var test = " + function test(args) {
+        assertEq(args.length, 3);
+        assertEq(args[0], this);
+        assertEq(args[1], f);
+        assertEq(args[2].toString(), "[object Object]");
+        return 42;
+    } + ";");
+g.eval("f(this, f, {});");
+
+var cv = testfn.apply(null, [args]);
+assertEq(cv.return, 42);