test/mjsunit/regress/regress-5174.js - v8/v8 - Git at Google

 // Copyright 2016 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.

 assertEquals([], Object.keys(new Proxy([], {})));
 assertEquals([], Object.keys(new Proxy(/regex/, {})));
	// Copyright 2016 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.

	assertEquals([], Object.keys(new Proxy([], {})));
	assertEquals([], Object.keys(new Proxy(/regex/, {})));