Stop adapting the arguments passed to the builtin implementations...

src/objects-inl.h

 // 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 1765 matching lines @@
 INT_ACCESSORS(SharedFunctionInfo, expected_nof_properties,
               kExpectedNofPropertiesOffset)
 INT_ACCESSORS(SharedFunctionInfo, start_position_and_type,
               kStartPositionAndTypeOffset)
 INT_ACCESSORS(SharedFunctionInfo, end_position, kEndPositionOffset)
 INT_ACCESSORS(SharedFunctionInfo, function_token_position,
               kFunctionTokenPositionOffset)
 
 
 void SharedFunctionInfo::DontAdaptArguments() {
+  ASSERT(code()->kind() == Code::BUILTIN);
   set_formal_parameter_count(kDontAdaptArgumentsSentinel);
 }
 
 
 int SharedFunctionInfo::start_position() {
   return start_position_and_type() >> kStartPositionShift;
 }
 
 
 void SharedFunctionInfo::set_start_position(int start_position) {
@@ skipping 328 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_