v8/test/mjsunit/regress/regress-4493-1.js

// Copyright 2015 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 baz(x, f) {
  return x.length;
};

function bar(x, y) {
  if (y) {}
  baz(x, function() {
    return x;
  });
};

function foo(x) {
  bar(x, '');
};
%PrepareFunctionForOptimization(foo);
%OptimizeFunctionOnNextCall(foo);
foo(['a']);