#840 Random map generator can generate wallstyles as decor
Using 1.71.dev-r20505, I found that occasionally the wallstyle walls end up being placed as decor on a random map.
At minimum, this occurs on the City de Clouds random map set; I've been trying to reproduce a different issue, and have encountered this a couple times instead.
I'm guessing its related to the lack of constraints on the map generation for this dungeon. It gets overexcited and loads something from ../wallstyles/ as decor, monsters, treasure, or something along those lines. This renders the dungeon uncompletable, and is irritating.
Looking at some of the code, there is some attempt to have the code deliberately load out-of-directory styles for additional randomness. Maybe we just need to avoid looking at wallstyles for this substitution (both as the original and as the substitute).
I didn't find any map with that kind of issue, but the code indeed allowed that kind of escape.
This should be fixed in r20708.
Many thanks for the report :)