Fix a problem where Object.getOwnPropertyDescriptor and related functions uni...

src/v8natives.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 477 matching lines @@
 
 PropertyDescriptor.prototype.hasSetter = function() {
   return this.hasSetter_;
 }
 
 
 // Converts an array returned from Runtime_GetOwnProperty to an actual
 // property descriptor. For a description of the array layout please
 // see the runtime.cc file.
 function ConvertDescriptorArrayToDescriptor(desc_array) {
-  if (desc_array == false) {
+  if (desc_array === false) {
     throw 'Internal error: invalid desc_array';
   }
 
   if (IS_UNDEFINED(desc_array)) {
     return void 0;
   }
 
   var desc = new PropertyDescriptor();
   // This is an accessor.
   if (desc_array[IS_ACCESSOR_INDEX]) {
@@ skipping 28 matching lines @@
 
 
 // ES5 section 8.12.1.
 function GetOwnProperty(obj, p) {
   // GetOwnProperty returns an array indexed by the constants
   // defined in macros.py.
   // If p is not a property on obj undefined is returned.
   var props = %GetOwnProperty(ToObject(obj), ToString(p));
 
   // A false value here means that access checks failed.
-  if (props == false) return void 0;
+  if (props === false) return void 0;
 
   return ConvertDescriptorArrayToDescriptor(props);
 }
 
 
 // ES5 8.12.9.
 function DefineOwnProperty(obj, p, desc, should_throw) {
   var current_or_access = %GetOwnProperty(ToObject(obj), ToString(p));
   // A false value here means that access checks failed.
-  if (current_or_access == false) return void 0;
+  if (current_or_access === false) return void 0;
 
   var current = ConvertDescriptorArrayToDescriptor(current_or_access);
   var extensible = %IsExtensible(ToObject(obj));
 
   // Error handling according to spec.
   // Step 3
   if (IS_UNDEFINED(current) && !extensible)
     throw MakeTypeError("define_disallowed", ["defineProperty"]);
 
   if (!IS_UNDEFINED(current)) {
@@ skipping 675 matching lines @@
 // ----------------------------------------------------------------------------
 
 function SetupFunction() {
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
     "bind", FunctionBind,
     "toString", FunctionToString
   ));
 }
 
 SetupFunction();