Fix crash with indexed setter on objects without corresponding getter.

src/objects.cc

-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// 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
 //       with the distribution.
@@ skipping 5502 matching lines @@
     if (entry != -1) {
       Object* element = dictionary->ValueAt(entry);
       PropertyDetails details = dictionary->DetailsAt(entry);
       if (details.type() == CALLBACKS) {
         // Only accessors allowed as elements.
         FixedArray* structure = FixedArray::cast(element);
         Object* getter = structure->get(kGetterIndex);
         if (getter->IsJSFunction()) {
           return GetPropertyWithDefinedGetter(receiver,
                                               JSFunction::cast(getter));
+        } else {
+          // Getter is not a function.
+          return Heap::undefined_value();
         }
       }
       return element;
     }
   }
 
   Object* pt = GetPrototype();
   if (pt == Heap::null_value()) return Heap::undefined_value();
   return pt->GetElementWithReceiver(receiver, index);
 }
@@ skipping 1843 matching lines @@
   // No break point.
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 
 
 } }  // namespace v8::internal