Yesterday I got a segfault while restarting the X server.
Here is the oops from dmesg: http://dump.thecybershadow.net/a995af2fcc85a1b671aa99580df08da0/nvidia-crash.txt
Unfortunately I did not know about nvidia-bug-report until after I restarted the PC. Here is the report from after the reboot: http://dump.thecybershadow.net/cb2c6735a4ec2decf2521304e716c741/nvidia-bug-report.log.gz
GPU is GTX Titan, driver version is 358.16-3 (Arch package). Hopefully the above will still be useful to someone. I’ll post here if I run into this again with more information.