Unity editor scripts are very crashy

Iam getting loads of crashes when iam developing editor scripts. I cant seem to find the reason for this since it just crashes to the desktop and that it. Is editor scripting in unity just really buggy or something or are there some magic rules you just need to know? Currently it just seems to crash at random times so its completely confusing me.

Also when closing unity i always get the bug reporter and in the log i see there was some unhandled access violation. I have uploaded this log here: error log. This seems to be threading related but i do not use threading in any of my code so this might be a unity bug or am I without knowing it calling any kind of multithreaded code?

Anyone else having this?