test/mjsunit/harmony/string-matchAll-deleted-matchAll.js - v8/v8 - Git at Google

 // Copyright 2018 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-string-matchall

 delete RegExp.prototype[Symbol.matchAll];
 const str = 'a';
 assertThrows(() => str.matchAll(/\w/g), TypeError);
	// Copyright 2018 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-string-matchall

	delete RegExp.prototype[Symbol.matchAll];
	const str = 'a';
	assertThrows(() => str.matchAll(/\w/g), TypeError);