Fixed and exposure to the_hole from Runtime_KeyedGetProperty....

src/runtime.cc

 // Copyright 2006-2009 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 2580 matching lines @@
     JSObject* receiver = JSObject::cast(args[0]);
     String* key = String::cast(args[1]);
     if (receiver->HasFastProperties()) {
       // Attempt to use lookup cache.
       Map* receiver_map = receiver->map();
       int offset = KeyedLookupCache::Lookup(receiver_map, key);
       if (offset != -1) {
         Object* value = receiver->FastPropertyAt(offset);
         return value->IsTheHole() ? Heap::undefined_value() : value;
       }
-      // Lookup cache miss.  Perform lookup and update the cache if
-      // appropriate.
+      // Lookup cache miss.  Perform lookup and update the cache if appropriate.
       LookupResult result;
       receiver->LocalLookup(key, &result);
       if (result.IsProperty() && result.IsLoaded() && result.type() == FIELD) {
         int offset = result.GetFieldIndex();
         KeyedLookupCache::Update(receiver_map, key, offset);
-        Object* value = receiver->FastPropertyAt(offset);
-        return value->IsTheHole() ? Heap::undefined_value() : value;
+        return receiver->FastPropertyAt(offset);
       }
     } else {
       // Attempt dictionary lookup.
       StringDictionary* dictionary = receiver->property_dictionary();
       int entry = dictionary->FindEntry(key);
       if ((entry != StringDictionary::kNotFound) &&
           (dictionary->DetailsAt(entry).type() == NORMAL)) {
         Object* value = dictionary->ValueAt(entry);
-        if (receiver->IsGlobalObject()) {
-           value = JSGlobalPropertyCell::cast(value)->value();
-        }
-        return value;
+        if (!receiver->IsGlobalObject()) return value;
+        value = JSGlobalPropertyCell::cast(value)->value();
+        if (!value->IsTheHole()) return value;
+        // If value is the hole do the general lookup.
       }
     }
   }
 
   // Fall back to GetObjectProperty.
   return Runtime::GetObjectProperty(args.at<Object>(0),
                                     args.at<Object>(1));
 }
 
 
@@ skipping 4929 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage();
   }
 }
 
 
 } }  // namespace v8::internal