Garrysmod troubleshooting:segmentation fault (core dumped)
From Serenity Servers Support
This is seen on the Linux version of Gmod, and can usually explain crashes on a server.
To fix this add the following to the servers server.cfg file. This can on our system be found on the gamepanel, and under configuration files.
sv_parallel_sendsnapshot 0 sv_parallel_packentities 0