Game crashes for unknown reason

Sometimes game crashes without obvious reason. It's not same task I am doing which causes it, so it should be somewhere in the background processes. I understand, it's hard to investigate these cases, but yesterday I had about 5 of them in 2-3 hours, and today it's first in two hours game. I am attaching stdoud.txt log. Should I attach them on every crash to help you find out the problem?