text: // 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
  
  var o = {v:1};
  var deopt = false;
  
  Object.defineProperty(o, "x", {
    get: function() { return this.v; },
    set: function(v) {
      this.v = v;
      if (deopt) {
        %DeoptimizeFunction(foo);
      }
    }
  });
  
  function foo(o) {
    var x = "x";
    return o[x]++;
  }
  
  assertEquals(1, foo(o));
  assertEquals(2, foo(o));
  %OptimizeFunctionOnNextCall(foo);
  deopt = true;
  assertEquals(3, foo(o));
  