// 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: --allow-natives-syntax

check = function() {
  assertEquals(null, check.caller);
};

var obj = {};
obj.valueOf = check;

function f() {
  Number(obj);
};
%PrepareFunctionForOptimization(f);
f();
%OptimizeFunctionOnNextCall(f);
f();