// Copyright 2016 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 --turbo-escape --noanalyze-environment-liveness

function f() {
  var bound = 0;
  function g() { return bound }
}
f();
f();
%OptimizeFunctionOnNextCall(f);
f();
