[tome] joylove: You can't just release an expansion like one would release a Kraken XD
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[tome] phantomfrettchen: your ability not to tease anyone is simply stunning
The bug is in the dungeon generator. I bet there are other rooms and corridors... but some corridors aren't connected to rooms since beta 15 (16?). Did you try digging around (assuming that you can)?
This could be problematic in the Infinite Dungeon. You're lucky here to have found connected staircases, if not you could have been stuck...
Levels where the stairs are not connected are rejected, it's no luck
[tome] joylove: You can't just release an expansion like one would release a Kraken XD
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[tome] phantomfrettchen: your ability not to tease anyone is simply stunning
I really do wish Infinite Dungeon characters started with a digger. It can be a VERY long time before you find one, and without one, there are certain things that are simply impossible for non-mages (like opening those monster nests that you can see with Preternatural Senses but can't fight, because they're completely entombed).
[tome] joylove: You can't just release an expansion like one would release a Kraken XD
--
[tome] phantomfrettchen: your ability not to tease anyone is simply stunning