Initialize data stores...

/opt/WoW/Core/src/server/game/DataStores/DBCStores.cpp:226 in LoadDBC ASSERTION FAILED:

DBCFileLoader::GetFormatRecordSize(storage.GetForm at()) == sizeof(T) || LoadDBC_assert_print(DBCFileLoader::GetFormatRecor dSize(storage.GetFormat()), sizeof(T), filename)

Size of ‘ItemDisplayInfo.dbc’ set by format string (8) not equal size of C++ structure (12).

Segmentation fault

What mean this error, and how can i fix it ?

I think you should try to extract dbc files with extractor.

Be sure, that extractor is the one you need for your version.