Throw TypeError when reading global references through a JSProxy

test/mjsunit/harmony/proxies-global-reference.js

Index: test/mjsunit/harmony/proxies-global-reference.js
diff --git a/test/mjsunit/harmony/proxies-global-reference.js b/test/mjsunit/harmony/proxies-global-reference.js
new file mode 100644
index 0000000000000000000000000000000000000000..1b77e66fdf3eb8822a426bd8d7f1482ef31a287c
--- /dev/null
+++ b/test/mjsunit/harmony/proxies-global-reference.js
@@ -0,0 +1,14 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-proxies
+
+var failing_proxy = new Proxy({}, new Proxy({}, {
+  get() { throw "No trap should fire" }}));
+
+Object.setPrototypeOf(Object.prototype, failing_proxy);
+assertThrows(()=>a, TypeError);
+
+Object.setPrototypeOf(this, failing_proxy);
+assertThrows(()=>a, TypeError);