Interesting Fatigue-Related Bug

Last night, as a "save-then-mess-around-with-everything" goof, I discovered a bug that's related to the Life-Stealing Dagger. I put on my Boots of the Dark Toll and Life-Stealing Dagger and waited one day. Surprised to find that I had only been left at -16 fatigue, I unequipped and re-equipped it so I could get up faster, but instead, I stumbled upon this:

Taking any action at this point causes the game to crash. Whether it be trying to get up, taking off the dagger, clicking the "wait" button, or the regular heal rate bringing your fatigue up.