hideous error? illegal use of memory?

has anyone had this error come up randomly if so how is this fixed?

comes up randomly - no fix so far - an old bug

you have totake a screen shot of the error message and email rat labs so they can fix the issue for you. It is happening to me as i am now using a new laptop to play the game.

This might happen when you melee attack a summon after the summoner is dead.

If you avoid attacking the summon and just press guard. It gets around that error for me.