v8/test/mjsunit/regress/regress-346587.js

// Copyright 2014 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 bar(obj) {
  assertTrue(obj.x === 'baz');
}

function foo() {
  bar({x: 'baz'});
};
%PrepareFunctionForOptimization(foo);
foo();
foo();
%OptimizeFunctionOnNextCall(foo);
foo();