Moved access checks out of Dictionary class.

src/objects.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 9528 matching lines @@
   }
 
   int entry = dictionary->FindEntry(index);
   if (entry != SeededNumberDictionary::kNotFound) {
     Object* element = dictionary->ValueAt(entry);
     PropertyDetails details = dictionary->DetailsAt(entry);
     if (details.type() == CALLBACKS) {
       return SetElementWithCallback(element, index, value, this, strict_mode);
     } else {
       dictionary->UpdateMaxNumberKey(index);
-      // If put fails in strict mode, throw an exception.
-      if (!dictionary->ValueAtPut(entry, value) && strict_mode == kStrictMode) {
+      // If a value has not been initialized we allow writing to it even if it
+      // is read-only (a declared const that has not been initialized).
+      if (!dictionary->DetailsAt(entry).IsReadOnly() ||
+          dictionary->ValueAt(entry)->IsTheHole()) {
+        dictionary->ValueAtPut(entry, value);
+      } else if (strict_mode == kStrictMode) {
         Handle<Object> holder(this);
         Handle<Object> number = isolate->factory()->NewNumberFromUint(index);
         Handle<Object> args[2] = { number, holder };
         Handle<Object> error =
             isolate->factory()->NewTypeError("strict_read_only_property",
                                              HandleVector(args, 2));
         return isolate->Throw(*error);
       }
     }
   } else {
@@ skipping 3510 matching lines @@
   if (break_point_objects()->IsUndefined()) return 0;
   // Single break point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 
 } }  // namespace v8::internal