Fixed usage of NewArgumentsObject for accessor.

src/accessors.cc

 // 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 364 matching lines @@
     // If there isn't an arguments variable in the stack, we need to
     // find the frame that holds the actual arguments passed to the
     // function on the stack.
     it.AdvanceToArgumentsFrame();
     frame = it.frame();
 
     // Get the number of arguments and construct an arguments object
     // mirror for the right frame.
     const int length = frame->GetProvidedParametersCount();
     Handle<JSObject> arguments = Factory::NewArgumentsObject(function, length);
+    Handle<FixedArray> array = Factory::NewFixedArray(length);
 
     // Copy the parameters to the arguments object.
-    FixedArray* array = FixedArray::cast(arguments->elements());
     ASSERT(array->length() == length);
     for (int i = 0; i < length; i++) array->set(i, frame->GetParameter(i));
+    arguments->set_elements(*array);
 
     // Return the freshly allocated arguments object.
     return *arguments;
   }
 
   // No frame corresponding to the given function found. Return null.
   return Heap::null_value();
 }
 
 
@@ skipping 100 matching lines @@
 }
 
 
 const AccessorDescriptor Accessors::ObjectPrototype = {
   ObjectGetPrototype,
   ObjectSetPrototype,
   0
 };
 
 } }  // namespace v8::internal