On Ubuntu, it should be pretty easy to build the game on your own. You could then give us a full backtrace, which would most likely allow us to fix the bug.
Unless it’s actually a corrupted save, in which case it may be unrecoverable.
The message itself doesn’t say much.
Console or tiles? Fresh worlds crash or not? Any NPCs nearby? Are they told to pick items up? Can you tell them not to and see if it still crashes?