If you could provide some details about your system and attach the latest save game file.
If possible get a coredump of the game.
to do that run the following from a terminal
ulimit -c unlimited
sudo chown o+w .
./blackplague
(the sudo chown is to ensure you have write permission to the game install directory you may need to do something else to ensure that.)
After the game crashes again run the following
gdb ./blackplague.bin core.###
where ### is the PID # of the core dump file (just do an ls -l core.*)
when in GDB simply run "thread apply all bt" and provide the output.