Strange crash

My server gets a very strange crash when i am playing. I have no idea what is causing it, maybe driving cars?
Modules installed: tmysql, pimpmyride, gatekeeper
Crashdump : https://dl.dropbox.com/u/89486551/srcds_1595686_crash_2012_12_28T6_11_7C0.mdmp
Picture of console: http://puu.sh/1GfyG