(crossposting what i said on mantis)

This save is moments away from a crash, i believe it to be related to a squad returning from a mission. Right before the crash, 2 of my military dudes are sparring, then my squad returns (sometimes it crashes before this, either right before or right after). also, the site they were to raid had 2 prisoners from a previous squad i had purposely sent to a fight i hoped they'd lose because one of them was a werebeast. another variable that while i don't think is involved in the crash but i feel is worth mentioning just in case: there is currently a forgotten beast active in the save, although stuck in a tree. the game crashes without leaving anything new in the errorlog.

i had retired this fortress previously because i had the same issue before with the game crashing upon the squad returning from another site i had sent them to raid, which, coincidentally, also had 2 prisoners from a previous squad, including a werebeast. by retiring the fortress then coming back, the squad i had sent on the mission were back at the fortress (although the mission was still active and they had no record of going there/spoils) and i was able to cancel the mission before they went back out.

I am using the latest version of the lazy newb pack, and thus also DFhack.