The Tor Browser / file revision

 // A proxy on the prototype chain of the global should not observe anything at

 // all about lazy resolution of globals.

 var global = this;

 var status = "pass";

 // This is a little tricky. There are two proxies.

 // 1. handler is a proxy that fails the test if you try to call a method on it.

 var metaHandler = {

   get: _ => { status = "SMASH"; },

   has: _ => { status = "SMASH"; },

   invoke: _ => { status = "SMASH"; }

 };

 var handler = new Proxy({}, metaHandler);

 // 2. Then we create a proxy using 'handler' as its handler. This means the test

 //    will fail if *any* method of the handler is called, not just get/has/invoke.

 var angryProxy = new Proxy(Object.create(null), handler);

 this.__proto__ = angryProxy;

 Object.prototype.__proto__ = angryProxy;

 // Trip the alarm once, to make sure the proxies are working.

 this.nonExistingProperty;

 assertEq(status, "SMASH");

 // OK. Reset the status and run the actual test.

 status = "pass";

 Map;

 ArrayBuffer;

 Date;

 assertEq(status, "pass");