I have seen a few seg-faults in the X server during the time I've been using Void on one machine (a few weeks). It happened again a while ago and I was in the middle of something pressing and didn't write down the traceback info. I'll report it next time it happens. I've never seen this on my other machines, which run Arch and Arch (and OpenBSD) have run reliably on the machine where I'm running Void. I note that pacman reports the server version as xorg-server 1.17.2-4 on one of my Arch boxes, whereas xbps shows xorg-server-1.17.2_5, so Void may be a little newer and perhaps the Xorg guys broke something in the server itself or the driver I'm using (video hardware on this machine is 'VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Caicos [Radeon HD 6450/7450/8450 / R5 230 OEM]').