Entered Castle Nathria mythic with AllTheThings DF-3.10.3

Result was ATT grinding the game to a halt and producing a stack overflow error in the chat (attached screenshot below)

I had to Alt-F4 the game and re-launch. Upon loading back in, the same issue occurred (wasn't a one-off).

(Couldn't find a log directory anywhere for a full stack trace - if there is one then let me know.)

This should be fixed for next release. Didn't get to link the commit to this issue unfortunately.