The hang wasn't reproducible, but if you insist.

I looked away from the screen for like a minute and came back to an "app not responding" dialog. Log attached. I did not have any mods enabled at the time. I have been using the non-blocking-saving feature for a while and haven't had any issues until now.

Not a bug per se, but it'd be greatly appreciated if the path was calculated from env vars as per the XDG Base Directory spec (my other Steam games use ~/.local/share/<game> i.e. $XDG_DATA_HOME).