Fix Object.getOwnPropertyDescriptor in string elements.

src/runtime.cc

 // Copyright 2012 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 1021 matching lines @@
         // 15.5.5.2. Note that this might be a string object with elements
         // other than the actual string value. This is covered by the
         // subsequent cases.
         Handle<JSValue> js_value = Handle<JSValue>::cast(obj);
         Handle<String> str(String::cast(js_value->value()));
         Handle<String> substr = SubString(str, index, index + 1, NOT_TENURED);
 
         elms->set(IS_ACCESSOR_INDEX, heap->false_value());
         elms->set(VALUE_INDEX, *substr);
         elms->set(WRITABLE_INDEX, heap->false_value());
-        elms->set(ENUMERABLE_INDEX,  heap->false_value());
+        elms->set(ENUMERABLE_INDEX,  heap->true_value());
         elms->set(CONFIGURABLE_INDEX, heap->false_value());
         return *desc;
       }
 
       case JSObject::INTERCEPTED_ELEMENT:
       case JSObject::FAST_ELEMENT: {
         elms->set(IS_ACCESSOR_INDEX, heap->false_value());
         Handle<Object> value = Object::GetElement(obj, index);
         RETURN_IF_EMPTY_HANDLE(isolate, value);
         elms->set(VALUE_INDEX, *value);
@@ skipping 12560 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal