- delete thinkers before starting to restore the savegame data to avoid interference of the old thinkers' Destroy() method with the newly loaded data.

Note that even with this change it is still not possible to unarchive any thinker pointers before the thinker list has been loaded as it would create broken lists.

src/dthinker.cpp

@@ -152,11 +152,6 @@ void DThinker::SerializeAll(FArchive &arc, bool hubLoad)
 	}
 	else
 	{
-		if (hubLoad)
-			DestroyMostThinkers();
-		else
-			DestroyAllThinkers();
-
 		// Prevent the constructor from inserting thinkers into a list.
 		bSerialOverride = true;