text: // 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
  
  Object.prototype["10"] = "unreachable";
  Object.prototype["7"] = "unreachable";
  Object.prototype["-1"] = "unreachable";
  Object.prototype["-0"] = "unreachable";
  Object.prototype["4294967296"] = "unreachable";
  
  var array = new Int32Array(10);
  
  function check() {
    for (var i = 0; i < 4; i++) {
      assertEquals(undefined, array["-1"]);
      assertEquals(undefined, array["-0"]);
      assertEquals(undefined, array["10"]);
      assertEquals(undefined, array["4294967296"]);
    }
    assertEquals("unreachable", array.__proto__["-1"]);
    assertEquals("unreachable", array.__proto__["-0"]);
    assertEquals("unreachable", array.__proto__["10"]);
    assertEquals("unreachable", array.__proto__["4294967296"]);
  }
  
  check();
  
  array["-1"] = "unreachable";
  array["-0"] = "unreachable";
  array["10"] = "unreachable";
  array["4294967296"] = "unreachable";
  
  check();
  
  delete array["-0"];
  delete array["-1"];
  delete array["10"];
  delete array["4294967296"];
  
  assertEquals(undefined, Object.getOwnPropertyDescriptor(array, "-1"));
  assertEquals(undefined, Object.getOwnPropertyDescriptor(array, "-0"));
  assertEquals(undefined, Object.getOwnPropertyDescriptor(array, "10"));
  assertEquals(undefined, Object.getOwnPropertyDescriptor(array, "4294967296"));
  assertEquals(10, Object.keys(array).length);
  
  check();
  
  function f() { return array["-1"]; }
  
  for (var i = 0; i < 3; i++) {
    assertEquals(undefined, f());
  }
  %OptimizeFunctionOnNextCall(f);
  assertEquals(undefined, f());
  