Dwarf Fortress Bug Tracker - Dwarf Fortress
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0011747Dwarf FortressDwarf Mode -- Environmentpublic2021-04-10 17:042021-05-08 20:27
Intel I5-2520MWindows 1020H2
0011747: Using constructions and ice, you can make dead tiles
Dead, unbuildable, unpassable, no material, no shape tiles are possible to create by following few steps.
Embark near 2+ Z deep ocean in a biome that both freezes and thaws.
Wait for freeze.
Mine (d->u) upward stairs on an area of the seafloor.
Construct walls over the resulting natural ice stairs.
(possibly optional) Wait for thaw and refreeze.
Deconstruct a constructed wall natural ice upward stairs remain.
Remove stairs (d->z).
Dead tile remains.
possible duplicate of: 0005459 (but that's labelled resolved)
No tags attached.
duplicate of 0001981acknowledged Loci Constructing wall/floor over ice ramp/stairs, followed by removing ramp/stairs, creates a "void tile" 
Issue History
2021-04-10 17:04nshapterNew Issue
2021-04-10 17:16nshapterNote Added: 0041028
2021-05-06 09:38QuietustNote Added: 0041044
2021-05-08 20:27lethosorNote Added: 0041048
2021-05-08 20:27lethosorRelationship addedduplicate of 0001981
2021-05-08 20:27lethosorStatusnew => resolved
2021-05-08 20:27lethosorResolutionopen => duplicate
2021-05-08 20:27lethosorAssigned To => lethosor

2021-04-10 17:16   
relevant save files:
https://dffd.bay12games.com/file.php?id=15500 [^]
2021-05-06 09:38   
Duplicate of 0001981?
2021-05-08 20:27   
Sounds like it, thanks. For reference, 0005459 was closed because it was a duplicate of 0001981.