v8/test/mjsunit/regress/regress-crbug-976598.js

// 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 f() {
  return { value: NaN };
}

%PrepareFunctionForOptimization(f);
f();
f();

let x = { value: "Y" };

%OptimizeFunctionOnNextCall(f);
f();