Long ago now I took apart the cart before having a spot for the gathering of dorfs designated, so they all wandered at random about the map using combat pathfinding, climbing around cliffs, leaping across chasms, tending slightly to the north west and all idle dorfs ending up in a very inaccessible part of the map. Then, once hungry, tried to regular pathfind back and complained about being stuck.
As far as I know, the same thing sometimes happens with fruit gatherers who get hungry while up a tree (if it's a walkable branch, they drop the stepladder, it gets tasked for stockpiling, and they starve up there for being unable to combat pathfind the climb down), or Liasons with nothing in particular to do (no tavern and such) but who aren't yet ready to leave.
Combat pathfinding also comes on when people get a big fright, so possibly your Liason was scared onto the Island. But in any case, friendlies just trying to find a way off the map or to a food pile never use combat pathfinding so can get stuck if that order switches on at a bad spot.
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Meanwhile, um, stress seems fine in 44.10, easier than it used to be, what are you all doing to your poor dorfs? I had a fisherdorf eventually pick a fight with the wrong hammerdorf, and a farmer who had to deal with all the corpses early on in the reclaim and got stuck with them for a bit, he's going the same way, but in both cases they
hated the rain and I left them with outdoors jobs (fishing and plant gathering respectively) for, well, that farmer still goes out in the rain, and he
hates it. But he's a good plant gatherer and I have no other real use for him, so eh.
Everyone else is fine. Even with clothes rotting off their bodies, they love their artefact-strewn temples, the inn has more poets than it does dorfs (some of whom are finally becoming citizens with their nice skill sets), like, they can all see quite a bit of death and bodies and stuff, just not all the time and not along with other things that they hate that add current bad thoughts to the bad memories and tip them over. Atom smash the intelligent corpses, and check your red arrow people's thoughts and fix their problems before they tantrum out and get themselves hammered. Not the memories, the bits you can fix. Keep an eye out for people yelling at the Mayor.
And really, as much as they don't like stepping over fifty dead and rotting elves on their way to work every day (dispose of the corpses!), they also don't like not having a temple, which gives them very happy thoughts when you do. Build temples. And a pub. And a library. Really. Happy things, some down time so they can meet up and get married and nail that life goal of having a kid for a permanent happy memory.
Reclaim? Yeah, there was a weretortoise. It did not end well, but those guys weren't unhappy, they were just chewing up migrant waves faster than I could try to wall off the survivors. Probably should've turned off the hospital looking back at it, hard to burrow people that are stuck in the hospital waiting for a medic who died a while back.