Dwarf Fortress Bug Tracker - Dwarf Fortress
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0003868Dwarf FortressDwarf Mode -- Buildings, Generalpublic2011-01-03 11:562014-10-04 11:08
normalminorhave not tried
0003868: Strange tile behavior after water freezing/ice melting/building
Some unusable tiles appeared in my fort after playing with ice.
I tried to dig ice to build some rooms in the see (smoothing ice wall), then tiled them with ice blocks. When summer came, smoothed icy wall melted, but since then i got some strange tiles you can't dig, channel, build, walk through.

Save here:
http://dffd.wimbli.com/file.php?id=3640 [^]
As i played a lot with ice in this zone (building / removing construction... I'm not sure what caused this bug.
Save Included, Save Needs Testing
related to 0004372resolved Toady One occasionally get negative distance value for materials for constructions 
has duplicate 0004954resolved Dwarfu creating useless space that is permenately blocked 
child of 0001265new  Ramps covered with ice have no floors above, adventurer can "fly" over 
Issue History
2011-01-03 11:56behbehrNew Issue
2011-01-03 11:56behbehrIssue Monitored: behbehr
2011-01-03 11:56behbehrIssue End Monitor: behbehr
2011-01-03 12:42DwarfuTag Attached: Save Included
2011-01-03 12:42DwarfuTag Attached: Save Needs Testing
2011-01-03 12:42DwarfuRelationship addedchild of 0001265
2011-10-28 12:02Rafal99Note Added: 0018922
2011-10-28 14:09QuietustNote Added: 0018924
2011-10-28 14:11QuietustNote Edited: 0018924bug_revision_view_page.php?bugnote_id=0018924#r7098
2011-11-10 02:18DwarfuRelationship addedhas duplicate 0004954
2012-05-21 11:20FootkerchiefRelationship addedrelated to 0005932
2012-06-14 16:30FootkerchiefRelationship addedrelated to 0004372
2012-06-14 16:30FootkerchiefRelationship deletedrelated to 0005932
2014-10-04 11:08Rafal99Note Added: 0030529

2011-10-28 12:02   
I have similar issue in my current fort in 0.31.25.
When water froze at winter, I dug some ice tiles in murky pools, then built walls on them. Later I deconstructed the walls, most of them left Ice floor tiles (which did not melt, but that is another bug), but 7 them left very strange "black hole" tiles.

These tiles:
-appear as completely black or show a stone boulder left from deconstructing the wall
-when viewed with (k) show completely nothing, even those containing a stone boulder
-are not walkable by dwarves
-constructions or furniture can't be built on them (shows "Blocked")
-are not minable
-digging a ramp 1 z-level below doesn't change them
-caveining something from above doesn't change them
-dropping water on them doesn't change them, but the dropped water is visible from z-level above

Save is available, PM me in the forums if you want me to upload. I am not going to delete the save.
2011-10-28 14:09   
(edited on: 2011-10-28 14:11)
I've seen other problems with ice messing up the tiles underneath it - if I dig beneath a murky pool and construct walls there, the "murky pool" tiles will disappear and be replaced with "[material] block floor" when the water freezes and remelts. This gave me a bit of a nasty surprise when I went to rebuild a bunch of old "rough" constructed walls using blocks - when I removed the constructed walls, the pool drained into the room and flooded it.

2014-10-04 11:08   
This one is pretty much the same bug as 0001981.