diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Object-unsafeDereference-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Object-unsafeDereference-01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+// Debugger.Object.prototype.unsafeDereference returns the referent directly.
+
+var g = newGlobal();
+var dbg = new Debugger();
+var gw = dbg.addDebuggee(g);
+
+assertEq(gw.getOwnPropertyDescriptor('Math').value.unsafeDereference(), g.Math);
+
+g.eval('var obj = {}');
+assertEq(gw.getOwnPropertyDescriptor('obj').value.unsafeDereference(), g.obj);