Game crashes when someone else enters Server

Hmm... according to the log, there was no other player connecting to the server? It seems that you had an invalid item in your hands or your inventory. It doesn't look like this crashed your game, though you disconnected from the server. When there was a crash of your game (i.e. crash to desktop), please have a look if there is a file called "errorlog" or "hs_err_pid" in your game directory.