src/v8/test/mjsunit/regress/regress-crbug-725537.js

// Copyright 2017 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: --expose-gc --verify-heap

const AsyncFunction = async function(){}.constructor;
class MyAsync extends AsyncFunction {}
var af = new MyAsync();
gc();