v8/test/mjsunit/regress/regress-crbug-769852.js

// Copyright 2017 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(o) {
  function g() {}
  Object.keys(o).forEach(suite => g());
};
%PrepareFunctionForOptimization(f);
assertDoesNotThrow(() => f({}));
assertDoesNotThrow(() => f({x: 0}));
%OptimizeFunctionOnNextCall(f);
assertDoesNotThrow(() => f({x: 0}));