// Copyright 2019 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-syntax

function C() {}
C.__proto__ = null;

function f(c) { return 0 instanceof c; }

%PrepareFunctionForOptimization(f);
f(C);
%OptimizeFunctionOnNextCall(f);
assertThrows(() => f(0));