0001932: Ice over water cave-in produces blocks of rock and "Unknown"

(0006908)
Logical2u (manager)
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 (reporter)
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 (manager)
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 (reporter)
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 (reporter)
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 (reporter)
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 (reporter)
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 (reporter)
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 (manager)
2014-08-09 13:25

o0NoobHunter0o posted a save at 0007923: http://dffd.wimbli.com/file.php?id=9331 [^]

Issue History
Date Modified	Username	Field	Change
2010-05-17 18:12	musicmastermsh	New Issue
2010-05-17 18:19	Logical2u	Note Added: 0006908
2010-05-17 18:36	musicmastermsh	Issue Monitored: musicmastermsh
2010-05-17 18:36	musicmastermsh	Issue End Monitor: musicmastermsh
2010-05-17 18:47	musicmastermsh	Note Added: 0006910
2010-05-17 20:50	Footkerchief	Note Added: 0006921
2010-05-17 20:56	Footkerchief	Note Edited: 0006921	View Revisions
2010-05-17 20:57	Footkerchief	Note Edited: 0006921	View Revisions
2010-05-17 21:13	musicmastermsh	Note Added: 0006922
2010-05-21 11:37	o_OWTFace	Note Added: 0007134
2010-05-30 01:34	Footkerchief	Relationship added	has duplicate 0002106
2010-06-19 11:57	musicmastermsh	Note Added: 0008688
2010-06-19 12:16	hyndis	Note Added: 0008693
2010-06-19 12:17	Footkerchief	Note Edited: 0006921	View Revisions
2011-03-21 06:51	Footkerchief	Relationship added	related to 0001265
2011-03-26 12:50	Footkerchief	Relationship added	has duplicate 0004260
2011-03-30 10:26	Footkerchief	Relationship added	related to 0001176
2011-03-30 10:38	Footkerchief	Relationship added	related to 0004257
2011-04-01 12:58	Footkerchief	Relationship added	related to 0000682
2011-05-09 15:33	DDR	Note Added: 0017674
2011-07-10 12:24	Dwarfu	Relationship added	related to 0004684
2011-12-07 09:41	Footkerchief	Relationship added	related to 0004941
2014-08-07 04:49	lethosor	Relationship added	related to 0007889
2014-08-09 11:20	lethosor	Relationship added	parent of 0007923
2014-08-09 11:21	lethosor	Relationship replaced	related to 0007923
2014-08-09 13:25	Footkerchief	Relationship replaced	has duplicate 0007923
2014-08-09 13:25	Footkerchief	Issue Monitored: o0NoobHunter0o
2014-08-09 13:25	Footkerchief	Note Added: 0028675
2014-08-09 13:26	Footkerchief	Assigned To	=> Footkerchief
2014-08-09 13:26	Footkerchief	Status	new => confirmed
2014-08-10 10:44	Footkerchief	Relationship replaced	has duplicate 0007889
2018-04-24 18:17	Huntthetroll	Issue Monitored: Huntthetroll

Notes
(0006908) Logical2u (manager) 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 (reporter) 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 (manager) 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 (reporter) 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 (reporter) 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 (reporter) 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 (reporter) 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 (reporter) 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 (manager) 2014-08-09 13:25	o0NoobHunter0o posted a save at 0007923: http://dffd.wimbli.com/file.php?id=9331 [^]