The current version of the Linux Dedicated Server (1.66.139494; sha1sum of arma3server binary: 5aea1b437290581023f888f0e27ab50ebeeb2dc1) crashes with a segmentation fault, after triggering a clean shutdown by sending SIGINT. I only stumbled upon this now, however it appears this behavior has been consistent since mid of March 2016. The error occurs on a vanilla Linux Dedicated Server (freshly installed, no mods, no custom configuration).
As can be seen from below GDB output, the error occurs after terminating several threads following the SIGINT, so I'd assume it to hide somewhere towards the end of the shutdown procedure.
I did not attach a core dump file, since I expect this issue not to be limited to my system. If you require a dump nontheless, feel free to ask for it.