Idk how, but the reason why I'm writing this post... Just a curious question, why would you possible want to do that?
1. All errors are being stored in Errors folder, where they can be tracked (unless you would prevent client from writing even those txt backups there)
2. Simply closing client gives you (and especially whoever you give your patch to) no clue what the hell happened AND he also can't send you log, meaning you have just no way how to solve any client crashing bug, 'cause you are just like blindfolded.
Btw, there is some rep on Modcraft?