Kinda hard for us to guess at what's crashing it. At what point is the server crashing? Is it crashing before it starts or while you're in-game? If it crashes while you're in game, what did you do before it crashed? How old is your source? Have you added any custom scripts or custom patches lately? Have you done any core mods that might crash the server? Make sure your tables aren't outdated if it is an SQL related crash.
Give us more information.
It's been crashing on and off due to an enchanting NPC script having wrong checks. At some places in the script it didn't do check, such as
if (item). However, that's 100% fixed now.
Pastebin link in case you wanna check it out:
http://pastebin.com/YLB74e2Z
However I've had an error a few times pointing at Gameobject.cpp. It occurs very rarely, and I haven't touched Gameobject.cpp.