Dwarf Fortress Bug Tracker - Dwarf Fortress
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IDProjectCategoryView StatusDate SubmittedLast Update
0000051Dwarf FortressCave-inspublic2010-04-01 17:112012-03-07 20:27
ReporterDraco18s 
Assigned ToFootkerchief 
PrioritylowSeverityminorReproducibilityrandom
StatusresolvedResolutionduplicate 
PlatformOSWindowsOS Version7
Product Version 
Target VersionFixed in Version 
Summary0000051: Cavern collapse at embark
DescriptionEmbarked and a loose section near the magma pipe was unsupported.
Steps To ReproduceSeeds from the game log:
Generating world using parameter set SMALLER REGION
 Seed: 881700428
 History Seed: 2811299488
 Name Seed: 3374574052
 Creature Seed: 3625186708
** Starting New Outpost **
A section of the cavern has collapsed!

I embarked on the only volcano on the map, putting it in the lower left of a 3x3 embark. Initial view should put you very close to it.
Additional Information(As a second bug: the wagon spawned on a peak of rock too small for it and deconstructed? Though it appears I did get all my stuff at least)
Tagscave-in, collapse, Save Included
Relationships
duplicate of 0005077resolved Toady One Browsing world gen map causes corrupted feature files 
has duplicate 0000081resolved Footkerchief Unknown subterranean collapse at embark 
has duplicate 0000098resolved Footkerchief Immediate Cavern Collapse 
has duplicate 0000495resolved Footkerchief Massive embark cave-in causes game to lock up for 10+ minutes 
has duplicate 0000633resolved Footkerchief Underground caverns cave in on embark. 
has duplicate 0000864resolved Footkerchief Immediate Collapse on embark, some underground items appear in stocks menu 
has duplicate 0002766resolved Logical2u I embarked on a location where it got a cavein, and when I used reveal, saw that there was an UG lake collapsing. 
has duplicate 0003653resolved Logical2u lava elevator? 
has duplicate 0004602resolved Logical2u Embark starts with 0 fps, caverns caving in, and lava pouring everywhere 
has duplicate 0004791resolved Footkerchief Cavern layer in the sky, collapse on embark. 
has duplicate 0005003resolved Footkerchief Some Maps Run Super Fast - Some Super Slow 
has duplicate 0005422resolved Footkerchief cave-in upon embark 
has duplicate 0001690resolved Footkerchief Embark Cave-in causes permanent performance loss (and excessive Architectural Wealth) 
related to 0002268resolved Footkerchief Cavern Lake Placement Error - Crossed Layers 
related to 0001791new  Magma sea breaching into Hell 
related to 0002713resolved Footkerchief Massive aboveground adamantine spire, dwarves ignore designations, sometimes crashes 
related to 0007250resolved Footkerchief "section of the cavern has collapsed" message on embark 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2010-04-01 17:11Draco18sNew Issue
2010-04-02 01:20DwarfuTag Attached: cave-in
2010-04-02 01:20DwarfuTag Attached: collapse
2010-04-03 07:11KhameroNote Added: 0000496
2010-04-03 07:43Logical2uNote Added: 0000507
2010-04-03 09:02FootkerchiefRelationship addedparent of 0000081
2010-04-03 09:02FootkerchiefRelationship addedparent of 0000098
2010-04-03 14:16DoctorZuberNote Added: 0000658
2010-04-05 15:45FootkerchiefRelationship addedparent of 0000495
2010-04-06 00:46FootkerchiefRelationship addedparent of 0000590
2010-04-06 09:40FootkerchiefRelationship addedparent of 0000633
2010-04-06 13:30FootkerchiefSummaryVolcanoe Cavern Collapse => Cavern collapse at embark (on volcano site)
2010-04-06 13:30FootkerchiefAdditional Information Updatedbug_revision_view_page.php?rev_id=464#r464
2010-04-06 13:30FootkerchiefSticky IssueNo => Yes
2010-04-06 13:41FootkerchiefSummaryCavern collapse at embark (on volcano site) => Cavern collapse at embark
2010-04-06 13:49bevilrNote Added: 0001574
2010-04-06 13:51bevilrNote Edited: 0001574bug_revision_view_page.php?bugnote_id=0001574#r467
2010-04-06 17:14drakiskierNote Added: 0001616
2010-04-09 04:36Khym ChanurIssue Monitored: Khym Chanur
2010-04-09 09:06FootkerchiefRelationship addedparent of 0000864
2010-04-11 00:22ItEndsWithTensNote Added: 0002739
2010-04-20 15:51smjjamesNote Added: 0004386
2010-04-21 08:24FrewfruxNote Added: 0004449
2010-04-22 10:32FootkerchiefRelationship addedparent of 0001339
2010-04-26 20:24ThoraniusNote Added: 0005252
2010-04-26 22:42DoctorZuberNote Added: 0005286
2010-04-26 22:43DoctorZuberNote Edited: 0005286bug_revision_view_page.php?bugnote_id=0005286#r1876
2010-04-27 03:09fake_robotNote Added: 0005316
2010-04-27 10:54DoctorZuberNote Added: 0005361
2010-04-27 10:56DoctorZuberNote Edited: 0005361bug_revision_view_page.php?bugnote_id=0005361#r1911
2010-04-27 10:58Logical2uNote Added: 0005362
2010-04-27 11:43DoctorZuberNote Added: 0005366
2010-04-27 12:11DoctorZuberNote Edited: 0005366bug_revision_view_page.php?bugnote_id=0005366#r1915
2010-04-27 12:19DoctorZuberNote Added: 0005369
2010-04-27 12:20DoctorZuberNote Edited: 0005286bug_revision_view_page.php?bugnote_id=0005286#r1916
2010-04-27 12:57FootkerchiefNote Added: 0005377
2010-04-27 12:57FootkerchiefNote Edited: 0005377bug_revision_view_page.php?bugnote_id=0005377#r1926
2010-04-27 12:58FootkerchiefNote Edited: 0005377bug_revision_view_page.php?bugnote_id=0005377#r1927
2010-04-27 12:58FootkerchiefNote Edited: 0005377bug_revision_view_page.php?bugnote_id=0005377#r1928
2010-04-27 13:51DoctorZuberNote Added: 0005392
2010-04-27 13:59FootkerchiefNote Added: 0005396
2010-04-27 15:55DoctorZuberNote Added: 0005421
2010-04-27 16:12Logical2uNote Added: 0005424
2010-04-27 20:13DoctorZuberNote Added: 0005455
2010-04-27 20:21Logical2uNote Added: 0005456
2010-04-27 20:30DoctorZuberNote Edited: 0005455bug_revision_view_page.php?bugnote_id=0005455#r1974
2010-04-28 14:01FootkerchiefCategoryGeneral => Map Features
2010-04-29 13:18FootkerchiefCategoryMap Features => Cave-ins
2010-04-29 17:13HugnaNote Added: 0005718
2010-04-29 21:09DoctorZuberNote Added: 0005730
2010-05-04 22:54pollo2019Issue Monitored: pollo2019
2010-05-04 22:56pollo2019Note Added: 0006140
2010-05-16 19:59sagragothNote Added: 0006835
2010-05-27 18:51ItEndsWithTensIssue Monitored: ItEndsWithTens
2010-06-10 16:49Logical2uRelationship addedrelated to 0002268
2010-06-20 08:13ellindseyNote Added: 0008770
2010-06-20 09:25FootkerchiefRelationship deletedparent of 0001339
2010-06-21 05:29Logical2uRelationship addedparent of 0002411
2010-07-08 04:40Logical2uRelationship addedparent of 0002594
2010-07-14 11:13JZENote Added: 0010246
2010-07-14 11:13JZEIssue Monitored: JZE
2010-07-14 11:34FootkerchiefNote Added: 0010247
2010-07-14 11:34FootkerchiefRelationship replacedhas duplicate 0000081
2010-07-14 11:34FootkerchiefIssue Monitored: Avenger
2010-07-14 11:34FootkerchiefIssue Monitored: cyclotis04
2010-07-14 11:35FootkerchiefRelationship addedrelated to 0001791
2010-07-14 11:35FootkerchiefRelationship replacedhas duplicate 0000098
2010-07-14 11:37FootkerchiefRelationship addedrelated to 0000127
2010-07-14 11:37FootkerchiefRelationship deletedparent of 0000590
2010-07-14 11:38FootkerchiefRelationship replacedhas duplicate 0000633
2010-07-14 11:38FootkerchiefRelationship replacedhas duplicate 0000864
2010-07-14 11:39FootkerchiefRelationship deletedparent of 0002411
2010-07-14 11:41FootkerchiefRelationship deletedparent of 0002594
2010-07-15 13:19MaDeR LevapNote Added: 0010372
2010-07-19 15:12Logical2uRelationship addedhas duplicate 0002766
2010-07-19 15:17smjjamesNote Added: 0010694
2010-07-19 15:53FootkerchiefIssue Monitored: smjjames
2010-07-19 15:53FootkerchiefNote Added: 0010696
2010-07-19 15:56smjjamesNote Added: 0010697
2010-07-19 16:03smjjamesNote Edited: 0010697bug_revision_view_page.php?bugnote_id=0010697#r4160
2010-07-19 16:04smjjamesNote Edited: 0010697bug_revision_view_page.php?bugnote_id=0010697#r4161
2010-07-19 16:10smjjamesIssue End Monitor: smjjames
2010-07-29 02:58sparrNote Added: 0011235
2010-07-29 06:20Rafal99Note Added: 0011242
2010-07-29 06:20Rafal99Note Edited: 0011242bug_revision_view_page.php?bugnote_id=0011242#r4395
2010-07-29 07:41smjjamesNote Added: 0011246
2010-07-31 21:27InsanityPreludeNote Added: 0011347
2010-08-18 16:35Logical2uRelationship addedrelated to 0000590
2010-08-18 16:36Logical2uRelationship addedrelated to 0001503
2010-09-24 19:01Logical2uRelationship addedrelated to 0003310
2010-09-30 11:10Jonathan ConleyNote Added: 0013086
2010-10-03 07:42Logical2uRelationship addedrelated to 0003319
2010-10-19 11:49greycatNote Added: 0013414
2010-11-17 08:32Logical2uRelationship addedhas duplicate 0003653
2010-11-17 08:32Logical2uRelationship replacedparent of 0003319
2011-05-01 15:12Logical2uRelationship addedhas duplicate 0004602
2011-07-29 06:52FootkerchiefRelationship addedparent of 0004791
2011-12-04 08:40DwarfuNote Added: 0019062
2011-12-04 08:40DwarfuTag Attached: Fixed in 0.31.26?
2011-12-04 08:40DwarfuTag Attached: Save Included
2011-12-25 06:59FootkerchiefRelationship addedparent of 0004163
2012-01-02 14:40FootkerchiefRelationship addedhas duplicate 0005003
2012-01-13 09:24MaDeR LevapNote Added: 0019382
2012-01-13 10:19FootkerchiefNote Added: 0019384
2012-02-14 05:12FootkerchiefTag RenamedFixed in 0.31.26? => Fixed in 0.34.01?
2012-02-17 08:02FootkerchiefRelationship addedrelated to 0002713
2012-02-19 11:11FootkerchiefRelationship addedparent of 0005306
2012-02-19 11:22KijiroNote Added: 0020145
2012-02-19 11:22KijiroNote Edited: 0020145bug_revision_view_page.php?bugnote_id=0020145#r7533
2012-02-19 11:26KijiroNote Edited: 0020145bug_revision_view_page.php?bugnote_id=0020145#r7534
2012-02-23 18:46FootkerchiefRelationship addedhas duplicate 0005422
2012-03-06 07:59FootkerchiefRelationship deletedrelated to 0000590
2012-03-06 08:00FootkerchiefRelationship replacedhas duplicate 0000495
2012-03-06 08:00FootkerchiefIssue Monitored: Logical2u
2012-03-06 08:00FootkerchiefIssue Monitored: lord_chaos22000
2012-03-06 08:01FootkerchiefRelationship replacedhas duplicate 0004791
2012-03-06 08:01FootkerchiefIssue Monitored: vasiln
2012-03-06 08:01FootkerchiefRelationship deletedparent of 0004163
2012-03-06 08:01FootkerchiefRelationship deletedparent of 0005306
2012-03-06 08:02FootkerchiefRelationship deletedparent of 0003319
2012-03-06 08:57FootkerchiefRelationship deletedrelated to 0001503
2012-03-06 08:59FootkerchiefRelationship deletedrelated to 0003310
2012-03-06 09:00FootkerchiefRelationship deletedrelated to 0000127
2012-03-06 09:01FootkerchiefNote Added: 0021173
2012-03-06 09:01FootkerchiefRelationship addedduplicate of 0005077
2012-03-06 09:01FootkerchiefStatusnew => resolved
2012-03-06 09:01FootkerchiefResolutionopen => duplicate
2012-03-06 09:01FootkerchiefAssigned To => Footkerchief
2012-03-06 09:01FootkerchiefTag Detached: Fixed in 0.34.01?
2012-03-07 20:27DwarfuSticky IssueYes => No
2012-03-30 06:57FootkerchiefRelationship addedhas duplicate 0001690
2012-03-30 06:57FootkerchiefIssue Monitored: Cryten
2014-08-15 06:59FootkerchiefRelationship addedrelated to 0007250

Notes
(0000496)
Khamero   
2010-04-03 07:11   
I can confirm the wagon thing, happened to me too. Nothing missing, but the entire party was crowded in a very tight spot with all the stuff.
Not sure how to reproduce, since you start off a random spot though.
(0000507)
Logical2u   
2010-04-03 07:43   
The wagon thing is pretty old - see http://www.bay12games.com/forum/index.php?topic=20883.0 [^] - but I don't think anyone reported it as a bug.

Did the volcano collapsing cause any other issues? There have been general issues in the past few versions with unsupported tiles collapsing at the start of gameplay due to how time and roofing is handled during and after worldgen.
(0000658)
DoctorZuber   
2010-04-03 14:16   
I can also confirm that I've seen the occasional collapse near a magma pipe in 40d. However with all the new 'stuff' in 2010 there are some new collapse issues as well.
(0001574)
bevilr   
2010-04-06 13:49   
(edited on: 2010-04-06 13:51)
I'll had "Cavern Collapse" messages at embark twice so far, with no visible magma pipes on the surface (although I haven't dug down yet).
(0001616)
drakiskier   
2010-04-06 17:14   
i get this one too. it zooms to a spot underground on embark and says cavern colapse.
(0002739)
ItEndsWithTens   
2010-04-11 00:22   
I just ran into the cavern collapse issue on a new fortress, and I don't see a magma pipe either; I have an embark autosave zipped up, along with my worldgen parameters if the time comes where it'll be necessary (generated in 31.01, but I started this fort in 31.02).
(0004386)
smjjames   
2010-04-20 15:51   
I just got it on an embark (the zoom to location function of the announcements is extremely useful here), so I dug down centering on the location. When I got to the area and it was revealed, I used the zoom to location, and guess what I found.

It was on the edge of a magma pool where there was a floor one z-level above the rim and it centered on a corner of the floor area. In fact, it was an unsuppourted corner.

The cavern collapse happens every time I embark on that spot.

Looks like we found the cause (or at least the main cause) which is the same reason why we sometimes get a collapse at an open magma pipe upon embark. The floor at that spot is a galena floor, but there is no galena nearby on the same z level as the magma pool or a level above (where the floor was). However, at the top z-level of that cavern section (4 z-levels above magma pool surface) part of the wall is galena. Not sure if the ore had anything to do with it. Also, the piece of floor that it was hanging off of is galena too, but thats the only tile of it, the rest of that floor and the area around the magma pool is obsidian (along the edge), mica, granite and the eroded part of a tetrahedrite vein on the same z-level as the pool surface. Makes you wonder how that isolated bit of galena got there...

Fakeedit: I just now noticed a galena vein on the other side of the pipe a z-level above. I guess that explains it.
(0004449)
Frewfrux   
2010-04-21 08:24   
Heh, I just had this happen on a map with no surface magma vent. After the initial "a section of cavern has collapsed" message with a zoom to un-revealed rock way down low on the map, I checked my units and saw a deceesed magma man. Guess he was in the wrong spot at just the right time. :)
(0005252)
Thoranius   
2010-04-26 20:24   
I've had this happen once as well upon embark, on a completely flat map, about 100+ levels down, according to the autofocus pause of the screen. I regret that I failed to note the exact depth, but since that save file is long gone, I doubt the specifics would of helped track down the exact issue, though it did happen after the release of the 31.03 version, so maybe it's related to the cavern generation sizing variables versus the new 7x7 collapse setup? No magma vents, aquafiers, or anything out of the ordinary, just a stream at ground level.
(0005286)
DoctorZuber   
2010-04-26 22:42   
(edited on: 2010-04-27 12:20)
http://dffd.wimbli.com/file.php?id=2246 [^]

Here's a save that has an immediate underground collapse. This is a nice cozy little pocket region, so the save file is nice and small. Be warned that I was testing extreme temperature settings with this world so the play time on this save will be very . . . short.

Warning, looking at this save using reveal contains SPOILERS!!!
(0005316)
fake_robot   
2010-04-27 03:09   
I had a cavern collapse upon embark. Being naturally curious, I dug down to -45. Upon arrival, I witnessed a magma pipe spilling into an underground cavern. The most unusual thing about this was all the cavern trees, happily still growing in 4/7 magma. Note to self, Fungiwood is an amazingly flame-retardant mushroom. After I uncovered it, I kept getting another cavern collapse message that seemed to be 1 tile infinitely smashing into the magma sea, about once every few in game days.
(0005361)
DoctorZuber   
2010-04-27 10:54   
(edited on: 2010-04-27 10:56)
oookay... I just had another crazy collapse in one of my hot region experiments. The place is completely uninhabitable with the entire surface of the world burning to death instantly smoke everywhere.

It's also spamming me to death with collapse warnings. every time I try to unpause it allows one frame to pass, throws another collapse warning and pauses again. It's somewhat comical.

I don't want to flood the place with saves, but I stashed a copy in a safe folder, and can produce it upon demand.

>>>Fake Robot -- Trees are still magma safe as far as I can tell, so this is expected behavior.
(0005362)
Logical2u   
2010-04-27 10:58   
Zuber: If you wouldn't mind, since this is in a world you're experimenting in, try using the Reveal Utility (http://magmawiki.com/index.php/DF2010:Utilities [^]) and see what is causing the collapses, and report back here?
(0005366)
DoctorZuber   
2010-04-27 11:43   
(edited on: 2010-04-27 12:11)
Oooh, I didn't know we had a trick for making reveal work already. Thankies muchly.

Oddly enough, on closer inspection, the collapse is not subterranean. It's a single tile on the surface. The pesky tile is on the edge of a volcano and it is repeatedly collapsing somehow.

It happens very fast, collapses once every frame.

Alright, that's just too weird, so I went ahead and uploaded it. And it's small anyhow. Here you go.
http://dffd.wimbli.com/file.php?id=2251 [^]
(0005369)
DoctorZuber   
2010-04-27 12:19   
And since I now have access to reveal again, I revisit my other save to find . . . SPOILERS!!!

This collapse is directly related to a new HFS feature. If you don't want to see spoilers, do not download it, and whatever you do, do not look at it using reveal.
http://dffd.wimbli.com/file.php?id=2246 [^]
(0005377)
Footkerchief   
2010-04-27 12:57   
(edited on: 2010-04-27 12:58)
What's needed for this bug is saves from before embarking at an insta-collapse site, plus screenshots of the embark screen so he knows where to embark. The bug is in the code that generates the local terrain at embark, and that code has already finished running when you do a post-embark save.
(0005392)
DoctorZuber   
2010-04-27 13:51   
that's trickier, since it automatically destroys that save when you embark... Humm... Any suggestions on how to do this without driving myself insane copying every region folder before embarking in the hopes of reproducing a collapse ?
(0005396)
Footkerchief   
2010-04-27 13:59   
that's trickier, since it automatically destroys that save when you embark

Only if you turned on the embark autosave option. Otherwise you can just end the process and re-embark, as long as you remember where.
(0005421)
DoctorZuber   
2010-04-27 15:55   
um... I do have embark autosave, both of those are the embark autosave files.
(0005424)
Logical2u   
2010-04-27 16:12   
... Well, you've got the save.

All you need to do now is
1. Abandon
2. Mark the place on the map where the fortress was using the Reclaim feature
3. Go to Legends mode and export the seed and world generation info
4. Regenerate the world using the seed and world generation information
5. Upload that new world for us!

Success!
(0005455)
DoctorZuber   
2010-04-27 20:13   
(edited on: 2010-04-27 20:30)
>>> Logical2u -- Thank you very much. This process will save me all sorts of sanity.

Okay, It took a bit of time to get this all sorted but I believe I now have both saves updated with the pre-embark saves.

HFS Collapse
http://dffd.wimbli.com/file.php?id=2246 [^]
Down in the deep earth some HFS collapses. If you don't want a spoiler, don't download it, and don't look at it with reveal.

Repeating Collapse
http://dffd.wimbli.com/file.php?id=2251 [^]
This is especially fun. The collapse is a single tile at the edge of a volcano. And it's collapsing repeatedly. It spams a collapse every single frame and just refuses to die. For extra bonus fun, it even continues to collapse on a reclaim of the site.

Assuming I didn't bork anything up both saves are now updated to include both pre and post embark saves and a png illustrating the location on the world map. If there's any problems give me a hollar here. I'll notice sooner or later.
(0005456)
Logical2u   
2010-04-27 20:21   
Well, the first one works for me. I'll check the 2nd one later if needed.
Thanks for your work!
(0005718)
Hugna   
2010-04-29 17:13   
My guess is that most likely the underground caverns. They can get as open as they want, meaning if they were as open as the entire map, or big enough, it will cave in and immediately cause quite a bad collapse. Best to hope it's not where you embarked.
(0005730)
DoctorZuber   
2010-04-29 21:09   
well, one of my saves basically is from an underground cavern, looking at it it seems like the ramps connecting one level to another cut off a corner of a HFS feature causing a collapse.

The other is stranger, although it might also be cut off by ramping too, it's a single tile at the edge of a volcano, right up at the top.
(0006140)
pollo2019   
2010-05-04 22:56   
Cave-in for me as well. At Embark
(0006835)
sagragoth   
2010-05-16 19:59   
Happened to me on 0.31.04.
(0008770)
ellindsey   
2010-06-20 08:13   
I have a fortress currently running in 31.07 in which I will usually get a collapse nearly every time I load the game. The collapse is always deep underground, not always in the exact same location but usually in one region. The collapses occur in the lowermost layers of caverns. Looking at that region I see what appears to be a large number of plants and trees floating in midair, as apparently many of the empty spaces have mud in them and this is causing plants to grow in the empty midair spaces. I'm not sure why the cave-ins are only happening when I load the game and not whenever a floating tree matures.
(0010246)
JZE   
2010-07-14 11:13   
I have had this experience too, but every time I zoom to location the map indicates I am at a level below ground that cannot possibly exist, such as -150. Not sure if this is a seperate bug or part of the same issue.
(0010247)
Footkerchief   
2010-07-14 11:34   
I have had this experience too, but every time I zoom to location the map indicates I am at a level below ground that cannot possibly exist, such as -150. Not sure if this is a seperate bug or part of the same issue.

What makes you think it "cannot possibly exist"? The underground goes down much deeper now -- 150 isn't out of the ordinary.
(0010372)
MaDeR Levap   
2010-07-15 13:19   
If this was caused by too big cavern to fit in embark area or something similiar, fix for it is simple - just treat border of map as supporting natural preexisting rock. You cannot build anything too close to edge of map anyway.
(0010694)
smjjames   
2010-07-19 15:17   
How about this big bad one?

http://dffd.wimbli.com/file.php?id=2750 [^]

A warning though, prepare for MASSIVE lag.
(0010696)
Footkerchief   
2010-07-19 15:53   
Reminder sent to: smjjames

Re: 0002268:0010692, ~10693, 0000051:0010694

In the future, please pick one (1) location to post your save.
(0010697)
smjjames   
2010-07-19 15:56   
(edited on: 2010-07-19 16:04)
Sorry, just thought it might be relevant to all three, so I posted in all three places.

Thats what Logical2U suggested when he duplicate closed the report I made.

Edit: After reading 495, I changed my mind since that one involves a much, much bigger collapse.
(0011235)
sparr   
2010-07-29 02:58   
I encountered an embark collapse and it also produced an invisible (at the time) underground building named "Untold (☼adamantium short sword☼)".
(0011242)
Rafal99   
2010-07-29 06:20   
I have 1-tile cave-in at my current embark location. I used reveal and it showed that there is one floor tile that is connected only diagonally to others and is collapsing immediatelly when I enable cave-ins. The tile is 1 level above a magma pipe, not even sure if it is magma pipe at all since it is just a circular magma thing going only 2 levels above the magma sea.
Might provide the save at any moment if needed.
(0011246)
smjjames   
2010-07-29 07:41   
@Sparr: In my search for a good embark area, I've run into cave ins that were revealed to have origionated from next to the demonic fortress several times. Likely related to the same thing that is happening with magma pipes.

@Rafal99: It is a magma pipe, just a tiny one :P . It happens.
(0011347)
InsanityPrelude   
2010-07-31 21:27   
I had one in the current version, but I forget if it was the fort on the volcano or not. At any rate, zoom to black space 15 z-levels down and "A section of the cavern has collapsed!" immediately upon embark.
(0013086)
Jonathan Conley   
2010-09-30 11:10   
I am getting another cavern collapse in un reviled space as well, upon using df revel i am seeing a cavern lake emptying out on top of a magma pipe
(0013414)
greycat   
2010-10-19 11:49   
http://dffd.wimbli.com/file.php?id=3297 [^]

This map has a collapsing cavern system. It collapses spontaneously, without dwarves being in or near it, multiple times per game-year. It is extremely like to collapse after saving/loading as well. Here's a tarball of the region directory right before loading. The cavern collapses upon loading.
(0019062)
Dwarfu   
2011-12-04 08:40   
This report, its children and relations will need to be verified in the new version based on today's devlog:

"...and what was hopefully the main cause of all those long-standing cave-in-on-embarks."

http://www.bay12games.com/dwarves/index.html#2011-12-03 [^]
(0019382)
MaDeR Levap   
2012-01-13 09:24   
I think we will have to close these kind of bug reports. Same seed now will produce different world (and I am not talking about preventing detached tiles, but about generating completely different world, where your old site just do not exist), so we will have just to wait for new reports of same thing.
(0019384)
Footkerchief   
2012-01-13 10:19   
We've discussed that with Toady: "In general, old saves will still be good because I have the full code from all of the released versions from the last few years, and most of the code doesn't change between versions, so I can still find and fix problems in a relevant fashion."

In other words, save incompatibility won't invalidate all the saves and world gen params that have been posted for existing reports.
(0020145)
Kijiro   
2012-02-19 11:22   
(edited on: 2012-02-19 11:26)
Cavern collapse on embark, lava in the sky! Craziness! Save game is paused so you can look around. Embarking on the same spot replicates the issue.

http://www.bay12games.com/dwarves/mantisbt/view.php?id=5306 [^]

edit: I did not embark on a volcano.

edit2: I tried embarking on another location nearby and the game just outright crashed. :(
(0021173)
Footkerchief   
2012-03-06 09:01   
Time for this old report to be laid to rest. 0005077 probably caused 95% of these problems. Some remaining issues are collected at 0001791.