Dwarf Fortress Bug Tracker - Dwarf Fortress
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IDProjectCategoryView StatusDate SubmittedLast Update
0001932Dwarf FortressDwarf Mode -- Itemspublic2010-05-17 18:122014-08-09 13:26
Reportermusicmastermsh 
Assigned ToFootkerchief 
PrioritynormalSeverityminorReproducibilityhave not tried
StatusconfirmedResolutionopen 
PlatformOSOS Version
Product Version0.31.03 
Target VersionFixed in Version 
Summary0001932: Ice over water cave-in produces blocks of rock and "Unknown"
DescriptionHad a wooden constructed wall built out over some water... the water froze, so I went to remove the wall while I could get at it. The wall came down really quick, and I went about my business. Spring time came, and the river thawed... but the areas that had wall over them still showed up as an ice floor... with water on the river floor beneath them. Floating ice? Maybe... but it wouldn't melt even as spring progressed. I went to channel the floors out, and they caved in, leaving a few blocks of dolomite rubble and two blocks of "Unknown". All blocks appeared as "open space" from above. After refreezing, I can dig into the dolomite. I can't do anything to the "Unknown".
Steps To ReproducePlay with ice?
Additional InformationI have a save for this, it's in 31.04 now; I don't know how to post saves for your viewing pleasure.
TagsNo tags attached.
Relationships
related to 0001265new  Ramps covered with ice have no floors above, adventurer can "fly" over 
has duplicate 0002106closed Footkerchief Unmeltable ice floors 
has duplicate 0004260resolved Footkerchief Floor glitches occur when ice falls and melts in a cave-in 
has duplicate 0007889resolved Footkerchief Ice-Drop, "Unknown" tile result 
has duplicate 0007923resolved lethosor Muddy Unknown and Unknown Tiles 
related to 0001176new  Ice Cave-ins for water in Glaciers producing odd results. 
related to 0004257resolved Footkerchief Infinite Cave-In Loop makes a fortress unplayable, even on reclaim 
related to 0000682new  Dropping large batch of ice into the stone layer (embarked on a glacier) didn't melt all the water at once. 
related to 0004684resolved Footkerchief Bugged area appeared in cavern while playing. 
related to 0004941new  Infinite Cave-In Loop in glacier 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2010-05-17 18:12musicmastermshNew Issue
2010-05-17 18:19Logical2uNote Added: 0006908
2010-05-17 18:36musicmastermshIssue Monitored: musicmastermsh
2010-05-17 18:36musicmastermshIssue End Monitor: musicmastermsh
2010-05-17 18:47musicmastermshNote Added: 0006910
2010-05-17 20:50FootkerchiefNote Added: 0006921
2010-05-17 20:56FootkerchiefNote Edited: 0006921bug_revision_view_page.php?bugnote_id=0006921#r2594
2010-05-17 20:57FootkerchiefNote Edited: 0006921bug_revision_view_page.php?bugnote_id=0006921#r2595
2010-05-17 21:13musicmastermshNote Added: 0006922
2010-05-21 11:37o_OWTFaceNote Added: 0007134
2010-05-30 01:34FootkerchiefRelationship addedhas duplicate 0002106
2010-06-19 11:57musicmastermshNote Added: 0008688
2010-06-19 12:16hyndisNote Added: 0008693
2010-06-19 12:17FootkerchiefNote Edited: 0006921bug_revision_view_page.php?bugnote_id=0006921#r3334
2011-03-21 06:51FootkerchiefRelationship addedrelated to 0001265
2011-03-26 12:50FootkerchiefRelationship addedhas duplicate 0004260
2011-03-30 10:26FootkerchiefRelationship addedrelated to 0001176
2011-03-30 10:38FootkerchiefRelationship addedrelated to 0004257
2011-04-01 12:58FootkerchiefRelationship addedrelated to 0000682
2011-05-09 15:33DDRNote Added: 0017674
2011-07-10 12:24DwarfuRelationship addedrelated to 0004684
2011-12-07 09:41FootkerchiefRelationship addedrelated to 0004941
2014-08-07 04:49lethosorRelationship addedrelated to 0007889
2014-08-09 11:20lethosorRelationship addedparent of 0007923
2014-08-09 11:21lethosorRelationship replacedrelated to 0007923
2014-08-09 13:25FootkerchiefRelationship replacedhas duplicate 0007923
2014-08-09 13:25FootkerchiefIssue Monitored: o0NoobHunter0o
2014-08-09 13:25FootkerchiefNote Added: 0028675
2014-08-09 13:26FootkerchiefAssigned To => Footkerchief
2014-08-09 13:26FootkerchiefStatusnew => confirmed
2014-08-10 10:44FootkerchiefRelationship replacedhas duplicate 0007889
2018-04-24 18:17HuntthetrollIssue Monitored: Huntthetroll

Notes
(0006908)
Logical2u   
2010-05-17 18:19   
You haven't done any modding, have you? I encountered this back in 40d after attempting to mod out an aquifer using a tool.

You can upload saves using the Dwarf Fortress File Depot, http://dffd.wimbli.com/. [^] It might be helpful if you could also produce a save before the cave in, to show how the "unknown" rock was produced.
(0006910)
musicmastermsh   
2010-05-17 18:47   
http://dffd.wimbli.com/file.php?id=2365 [^]

The pre-cavein state shouldn't be hard to recreate. Wooden wall over ice, let it thaw and refreeze, remove wall. When it thaws again, look for ice that remains.
(0006921)
Footkerchief   
2010-05-17 20:50   
(edited on: 2010-06-19 12:17)
An answer to Logical2u's question about modding would be helpful.

Anyway, this is probably related to one or more of the old bugs collected at 0001206:0003734, most likely these:

# 000885 □ [dwarf mode][jobs][constructions] (http://www.bay12games.com/forum/index.php?topic=20102.0 [^]) placing a construction over an obsidian floor made on a lake and then removing it left a loam behind
# 000880 □ [dwarf mode][environment] (http://www.bay12games.com/forum/index.php?topic=7013.0 [^]) after ice melted in a channel, the square became "muddy unknown"
# 000667 □ [dwarf mode][jobs][designations] (http://www.bay12games.com/forum/index.php?topic=9464.0 [^]) caving in ice from a pool down one level resulted in open space over rock
(0006922)
musicmastermsh   
2010-05-17 21:13   
Nothing significant or related, no.

Now that I think about it, the floating ice is just as strange as what happened to it after I mined it...
(0007134)
o_OWTFace   
2010-05-21 11:37   
I can confirm this. Some combination of natural and constructed ice stairways in the middle of a frozen ocean collapsed when it thawed (which means one of those types didn't melt properly). One tile became a black square unknown tile just floating there. Sometime after that the game would crash when I looked in the glob section of stocks, but that could be related to "liquid [10]" sorts of bugs that I was also getting.
(0008688)
musicmastermsh   
2010-06-19 11:57   
This is still happening in 31.05, I'll pick up 31.07 now that it's out and try it there.
(0008693)
hyndis   
2010-06-19 12:16   
This may be an old bug. I've seen this happen even in 40D.

It involved carving ramps into a glacier and constructing things over the ramp. The square ended up turning black, just an empty void. Could never build anything there or do anything with that square ever again.
(0017674)
DDR   
2011-05-09 15:33   
I just reproduced this bug, or something like it, in 31.25. In this case, I built a tower on ice during the winter. When summer came, and the ice melted, the tower hovered there until I loaded a save. Then, it came crashing down, and left some muddy unknown where the stairwell was. Construction materials: Stone near the bottom, ice near the top.

Thanks.
(0028675)
Footkerchief   
2014-08-09 13:25   
o0NoobHunter0o posted a save at 0007923: http://dffd.wimbli.com/file.php?id=9331 [^]