Kicking a huge rock on pit may crash the game
Kicking a huge rock on to a pit may cause critical internal error with signal 6 to be raised.
I tried this a few times with the attached save file and the game crashed several times and only once the hole was filled with the huge rock without the game crashing.
To reproduce the bug, drop a huge rock on ground next to a pit trap and keep kicking it on and off the trap until the game crashes (or if the pit is filled by the rock, try again with another huge rock).