@ninjabax same thing is happening to me!
@nct83 I've had this problem and I managed to fix it myself! Before jumping in the poison pit throw a torch in to burn the poison gas away and then go ahead and move the bodies it worked for me.
Whilst doing the side mission "Of All That Has Passed..." whilst trying to get rid of the cursed object by moving the dead bodies in the poison pit, the game crashes. This happens everytime. Please patch!