Gmod crashes randomly while playing TTT

When I join a ttt server, I can play for some time, from 5 minutes to around 2 hours, and then gmod will crash out of the blue.
I’ve tried verifying cache, reinstalling, uninstalling all addons, removing downloads, still doesn’t help.
Here is my crash dump:
http://dumps.metastruct.uk.to/dumper.py?dump=hl2_170725_crash_2017_7_26T12_35_2C0.mdmp&key=GRyMSpsXj2zF-n3MrnOhC4PIpvvCTEY9VaCvVDYNntfAv6L5lKQa-LBRSvFsBPlFKUjRTPcNTNYV_pQbswGw2XH5TOjQnRmS0xE5ru3MQBAxkqn_PyqZRXZYkGA7T17jcauPwmgGKCIxSCTj-6f3px-nd62aXV2TXPV_dmzg40A=

Hope you can help.
Thanks in advance

bump

Do you have Multi Core rendering enabled? Try disabling it. That fixed Gmod crashing for me randomly