The log said I descended a staircase, but my player became stuck. I pressed ESC and tried to load again, but it said there was no saved game. I didn't get any sort of crash log. Pressing esc again on the main menu seemed to have exit the game.
After I refreshed the game, my saved game was apparently back, but I still can't go down the stairs. And this floor had no chasms, but trying them (jumping or climbing) in the upper floors doesn't work - just seems to close the prompt.
Overall though my experience was that nothing could hurt me with a few allocations to agility, and hunger therefore wasn't an issue as I could eat everything.