Dwarf Fortress Bug Tracker - Dwarf Fortress
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0001981Dwarf FortressDwarf Mode -- Jobs, Constructions (walls etc)public2010-05-19 19:132019-05-20 07:52
0001981: Constructing wall/floor over ice ramp/stairs, followed by removing ramp/stairs, creates a "void tile"
There are currently issues with ice ramps.

First: Constructed Floors built over Ice ramps do not remove the down ramp designation on the z-level above the ramp.

Second: Removing a constructed floor/wall built over an ice ramp, then (d)(z) the ramp, and the result is void space that cannot be designated or built over and is impassible.
1) Find Ice
2) Channel/Carve Ramp
3) (b)(C)(f) over one of the revealed ramps, using any material
4) Once complete, go up one z level and see the Downward Slope

1) As above in First 1-3
2) Remove the constructed object(d) (n)
3) Remove the carved ramp (d)(z)
4) Void space will be created, possibly containing a stone of ramp material.
0.40.02, construction, ice, ramp
parent of 0008400acknowledged Loci Removing natural upwards ramps from icy brook floor produced empty tiles 
has duplicate 0002326resolved Footkerchief Occasionally, a tile will become completely empty of all items, and count as blocked for building. 
has duplicate 0002723resolved Footkerchief building a wall over an up stair in ice, removing it, then removing the up stair makes void, blocked tiles 
has duplicate 0005459resolved Footkerchief Dead inoperable tiles created when carving ice 
has duplicate 0007211resolved Footkerchief Removal of constructed wall created unusable black tile 
has duplicate 0011747resolved lethosor Using constructions and ice, you can make dead tiles 
child of 0001265new  Ramps covered with ice have no floors above, adventurer can "fly" over 
Not all the children of this issue are yet resolved or closed.
Issue History
2010-05-19 19:13sloshmongerNew Issue
2010-05-19 19:14sloshmongerTag Attached: ice
2010-05-19 19:14sloshmongerTag Attached: construction
2010-05-19 21:15MrWigglesTag Attached: ramp
2010-05-19 23:33FootkerchiefNote Added: 0007044
2010-06-14 12:07FootkerchiefRelationship addedhas duplicate 0002326
2010-07-17 09:10FootkerchiefRelationship addedparent of 0002723
2010-07-17 11:58FootkerchiefSummaryIce Ramps and Constructions => Constructing wall/floor over ice ramp/stairs, followed by removing ramp/stairs, creates a "void square"
2010-07-17 11:59FootkerchiefSummaryConstructing wall/floor over ice ramp/stairs, followed by removing ramp/stairs, creates a "void square" => Constructing wall/floor over ice ramp/stairs, followed by removing ramp/stairs, creates a "void tile"
2010-07-17 11:59FootkerchiefRelationship replacedhas duplicate 0002723
2010-07-17 22:55ArtanisIssue Monitored: Artanis
2010-07-25 14:25FootkerchiefRelationship addedchild of 0001265
2010-12-07 10:33akdNote Added: 0014438
2010-12-07 10:40akdNote Edited: 0014438bug_revision_view_page.php?bugnote_id=0014438#r5490
2011-04-05 07:35FootkerchiefRelationship addedrelated to 0004191
2011-04-05 07:35FootkerchiefRelationship deletedrelated to 0004191
2012-02-26 10:43FootkerchiefRelationship addedhas duplicate 0005459
2012-02-26 10:54jeturcotteNote Added: 0020752
2014-07-13 09:13FootkerchiefRelationship addedhas duplicate 0007211
2014-07-13 09:29eliotcougarNote Added: 0026144
2014-07-13 09:29eliotcougarTag Attached: 0.40.02
2014-12-01 03:17ptb_ptbNote Added: 0031235
2018-02-05 17:54hertggfIssue Monitored: hertggf
2019-03-09 08:03LociRelationship addedparent of 0008400
2019-03-09 08:06LociAssigned To => Loci
2019-03-09 08:06LociStatusnew => acknowledged
2019-05-20 07:52CosinusNote Added: 0039375
2021-05-08 20:27lethosorRelationship addedhas duplicate 0011747

2010-05-19 23:33   
The second is this old bug:

# 001008 □ [dwarf mode][jobs][constructions] (http://www.bay12games.com/forum/index.php?topic=23971.0 [^]) dig ice ramp -> build pillar -> remove pillar -> dig out ice ramp leads to a void square
2010-12-07 10:33   
(edited on: 2010-12-07 10:40)
Encountered the second bug while doing maintenance on my winter-time well. Can provide a save if Toady thought it'd be interesting.

Edit: Actually, I'm not 100% positive that I followed the same steps, but regardless it's probably the same end result, and it's pretty clear that ice just doesn't work quite right overall.

2012-02-26 10:54   
here's an example of the error: see northwest corner of tower moat

http://dffd.wimbli.com/file.php?id=5702 [^]
2014-07-13 09:29   
Wow... I didn't know this was such an old bug...
Still happens in 0.40.02
2014-12-01 03:17   

Is either related to this one or a duplicate.
2019-05-20 07:52   
This still happens in 44.12. I built walls over ramps, then removed them and removed the ramps. This resulted in void tiles as described in the post.