Segmentation fault, 1.06 on Linux

I just got a segmentation fault: killed a monster, all going well, suddenly the game disappears.

Terminal read:

Code:

attempting to damage object: attempting to damage object: Monster takes 4 damage by the player
; HP -2 / 10

Player kills monster, gains 5 XP
total xp: 82
Segmentation fault

Playing on 64-bit Ubuntu 11.04.

If there's a log where I can access any more information, let me know and I'll post it.