This is an unusual type of crash Lorddeath666687. I am a purely offline singleplayer but have not experienced this myself. I think we may have to ask you a few additional questions to try and tease out the cause and effect here.
Are you an online or offline singleplayer?
Has this always been a problem for you ever since you first created your character, or has it only emerged recently?
How large would you guesstimate that your base is?