Use CopyElements for SetFastDoubleElementsCapacityAndLength

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 6751 matching lines @@
       }
       increment = len;
     } else if (elt->IsString()) {
       String* element = String::cast(elt);
       int element_length = element->length();
       increment = element_length;
       if (ascii && !element->HasOnlyAsciiChars()) {
         ascii = false;
       }
     } else {
+      ASSERT(!elt->IsTheHole());
       return isolate->Throw(isolate->heap()->illegal_argument_symbol());
     }
     if (increment > String::kMaxLength - position) {
       isolate->context()->mark_out_of_memory();
       return Failure::OutOfMemoryException();
     }
     position += increment;
   }
 
   int length = position;
@@ skipping 6579 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