test/mjsunit/regress/regress-crbug-880207.js

// 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

function foo() {
  return Object.is(Math.expm1(-0), -0);
}

assertTrue(foo());
%OptimizeFunctionOnNextCall(foo);
assertTrue(foo());