Dwarf Fortress Bug Tracker - Dwarf Fortress
View Issue Details
0008671Dwarf FortressDwarf Mode -- Jobs, Constructions (walls etc)public2014-12-27 09:232016-05-11 21:54
0008671: Dwarves will deconstruct floors under (themselves/neighboring dwarves?) causing them to fall
Dwarves will stand on tiles that are marked to be deconstructed, even if there are adjacent tiles that are not marked to be deconstructed. Depending on timing this can result in dwarves falling when the tiles vanish. In removing 10 tiles with seven dwarves I had two fall into the river below.
* Build flooring over air/water/magma such that it is two tiles n/s and a bunch e/w (or vice versa).
* Mark one row of the tiles to be deconstructed when several dwarves are available.
* Wait. Check for splashes.
http://imagr.eu/up/549eea868435f_splash.png [^]

Of the three dwarves lined up two are standing on tiles that are being deconstructed. One or more may shortly be swimming.

Sav file uploading.
No tags attached.
duplicate of 0008253new  Dwarf removing construction gets "creature swapped" onto construction tile, removes floor beneath his feet 
Issue History
2014-12-27 09:23ptb_ptbNew Issue
2014-12-27 09:41ptb_ptbNote Added: 0031511
2014-12-27 09:50ptb_ptbNote Edited: 0031511bug_revision_view_page.php?bugnote_id=0031511#r12609
2014-12-27 11:04ptb_ptbNote Edited: 0031511bug_revision_view_page.php?bugnote_id=0031511#r12613
2014-12-31 07:57ptb_ptbNote Added: 0031616
2014-12-31 08:00ptb_ptbNote Edited: 0031616bug_revision_view_page.php?bugnote_id=0031616#r12638
2014-12-31 08:14ptb_ptbNote Edited: 0031616bug_revision_view_page.php?bugnote_id=0031616#r12639
2015-01-09 05:56LociNote Added: 0031810
2015-01-09 05:56LociNote Edited: 0031810bug_revision_view_page.php?bugnote_id=0031810#r12734
2015-01-09 06:29FootkerchiefRelationship addedrelated to 0008253
2015-01-09 06:42ptb_ptbNote Added: 0031815
2015-07-11 06:09DetrosNote Added: 0032882
2015-07-11 06:09DetrosIssue Monitored: Detros
2015-07-12 10:44DetrosNote Edited: 0032882bug_revision_view_page.php?bugnote_id=0032882#r13210
2016-05-11 21:54DwarfuNote Added: 0035149
2016-05-11 21:54DwarfuRelationship replacedduplicate of 0008253
2016-05-11 21:54DwarfuStatusnew => resolved
2016-05-11 21:54DwarfuResolutionopen => duplicate
2016-05-11 21:54DwarfuAssigned To => Dwarfu

2014-12-27 09:41   
(edited on: 2014-12-27 11:04)
It doesn't always happen. Sometimes the dwarves standing on dangerous tiles 'realize' at the last moment and cancel their job, walking away. Sometimes they don't (or possibly they do 'realize' but there is no job to take them away elsewhere so they don't move fast enough).

I did upload the save from the screenshot. But nobody fell when I unpaused. *shrug* Two _did_ fall in the earlier incident, but I don't have a save for them.

File: http://dffd.wimbli.com/file.php?id=10342 [^]

[EDIT] Caught one of the little buggers at it. He was deconstructing under himself, not his neighbor.

2014-12-31 07:57   
(edited on: 2014-12-31 08:14)
Got a new example. Kubuk is deconstructing the tile he is standing on. Load, wait a short while, SPLASH.

I don't know why he is standing on top of that tile. My best guess is that he previously deconstructed the tile _next_ to him, then decided he didn't have to move.

Save: http://dffd.wimbli.com/file.php?id=10342 [^]

2015-01-09 05:56   
This may be a duplicate of 0008253. Does the problem persist if you only have one dwarf removing floor tiles (and no other traffic)?

In my experience, dwarves will generally refuse to remove the floor under a fellow dwarf, but will foolishly remove the floor under themselves.

2015-01-09 06:42   
Yeah, it probably is a duplicate of 0008253 I didn't see that one when I searched the bug tracker.
2015-07-11 06:09   
(edited on: 2015-07-12 10:44)
Got it now in vanilla 0.40.24: 10ish up/down stairs were being removed all at once. After a while I have found one of the higher ones has a dwarf that is removing that stairs he was standing one. Both stairs above and below him were already removed. After he removed his stairs there was no splash because this was 7ish levels above terrain on side of constructed pillar of big bridge (from walls, not actual "pillar" and "bridge" buildings). Instead, he fell an immediately died from the impact.

I have save stored from few days before the incident. If needed, I may try to remove that staircase again and see if there does happen any creature swapping.

2016-05-11 21:54   
Unless OP has compelling reason to maintain a separate report, I'll resolve this as a duplicate of 0008253, so continue discussion there.