// Copyright 2020 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: --allow-natives-syntaxfunctionf(fnConstructor){returnObject.is(newfnConstructor(),undefined);}constrealmIndex=Realm.createAllowCrossRealmAccess();constotherFunction=Realm.global(realmIndex).Function;Realm.detachGlobal(realmIndex);%PrepareFunctionForOptimization(f);assertFalse(f(Function));assertThrows(_=>f(otherFunction));%OptimizeFunctionOnNextCall(f);assertThrows(_=>f(otherFunction));