I've accidentally trapped my mason at the bottom of my mineshaft.
The shaft is 5x5 with up/down stairways, except for at the bottom.
The bottom layer has down stairways (dug, not constructed) leading to my aqueduct.
There's plenty of Diorite on the same level as the mason, and, I have designated the construction of the Up stairways on the current Down stairways.
Right now, however, he's just sort of standing there progressively getting thirsty. Any ideas?
I do have another mason with 'No job' and 2 miners with the mason skill enabled. I also ensured that nothing within range is forbidden.
The odd thing is he won't even build a floor on the same level, let alone an up/down stairways or up stairways.