0004372: occasionally get negative distance value for materials for constructions

(0016712)
Footkerchief (manager)
2011-03-28 02:33

Reminder sent to: Drawde

It would be extremely helpful to upload a save demonstrating this problem to http://dffd.wimbli.com/ [^]

(0016714)
Kogut (reporter)
2011-03-28 05:31

Is it possible that you are constructing things from ice? It happened for me after melting of mined ice.

(0016748)
Drawde (reporter)
2011-03-28 18:24

Done, under "Negative material distance" in the bugged saves section.

I listed the steps I took to duplicate it. I had to remove the stairs in a room, the only way into it, and then tried rebuilding the stairs there. As I said, it doesn't always show up. But I think it's caused when some of the material is unreachable, but locked doors didn't seem to be enough to cause it.

(0016749)
Footkerchief (manager)
2011-03-28 18:52

For ease of retrieval you can also link the file, like so: http://dffd.wimbli.com/file.php?id=4069 [^]

(0024580)
smjjames (reporter)
2014-02-28 06:26

I had it happen once in relation to smoke blocking access. I forget the exact circumstances, but I think it happened when I tried to build something in an area that was covered by smoke. Or at least the smoke was either blocking the pathing or was blocking materials, don't remember exactly.

I know it's not much to go on, but it's a possible lead to reproducing it.

(0029772)
heritage727 (reporter)
2014-08-29 10:16

I've encountered this in 40.10 and have uploaded a save to http://dffd.wimbli.com/file.php?id=9557. [^] Smoke may have been a factor here as well--I had just had a dwarf incinerated by a fire imp nearby. Also, I noticed that each time I escaped from the selection menu and then reentered it, the distance would increase by an additional 1250000. Screenshots at http://i.imgur.com/2vbjyen.jpg [^] and http://i.imgur.com/2e780p6.jpg.> [^]

(0033030)
Loci (manager)
2015-09-02 15:02

Confirmed in v0.40.24. This bug appears to occur when the path to a material is "soft invalidated", and resolve itself when the game is reloaded (and paths presumably recalculated).

A reproducing scenario:

designate one tile for channeling per z-level in a 2x1 area, alternating which tile on each z-level, such that each subsequent z-level "breaks" the ramp on the prior z-level.
wait for your miner to dig down and produce some boulders
designate a construction on the surface, and note the recently-produced boulders appear at the top of the list with negative distance.

(0033033)
lethosor (manager)
2015-09-02 17:31

Thanks!

(0033732)
Toady One (administrator)
2015-12-10 11:48

Cool - I also got it to happen with channels. Thanks for the reproducible procedure. There might be other configurations that cause this to happen, or something with water or cave-ins or whatever, but this is probably the main culprit, so I'll mark it off until we see it again.

Issue History
Date Modified	Username	Field	Change
2011-03-28 01:56	Drawde	New Issue
2011-03-28 02:33	Footkerchief	Note Added: 0016712
2011-03-28 02:33	Footkerchief	Relationship added	related to 0001137
2011-03-28 05:31	Kogut	Note Added: 0016714
2011-03-28 18:24	Drawde	Note Added: 0016748
2011-03-28 18:52	Footkerchief	Note Added: 0016749
2011-03-28 18:52	Footkerchief	Relationship added	related to 0001254
2012-06-14 16:30	Footkerchief	Relationship added	related to 0003868
2012-06-14 16:30	Footkerchief	Relationship added	has duplicate 0005932
2014-01-05 22:07	Dwarfu	Relationship added	has duplicate 0006404
2014-02-24 09:12	Footkerchief	Assigned To	=> Footkerchief
2014-02-24 09:12	Footkerchief	Status	new => acknowledged
2014-02-28 06:26	smjjames	Note Added: 0024580
2014-08-29 10:16	heritage727	Note Added: 0029772
2015-09-02 15:02	Loci	Note Added: 0033030
2015-09-02 17:31	lethosor	Note Added: 0033033
2015-09-02 17:31	lethosor	Status	acknowledged => confirmed
2015-09-02 17:31	lethosor	Steps to Reproduce Updated	View Revisions
2015-09-08 16:38	lethosor	Relationship added	has duplicate 0009067
2015-12-10 11:48	Toady One	Note Added: 0033732
2015-12-10 11:48	Toady One	Status	confirmed => resolved
2015-12-10 11:48	Toady One	Fixed in Version	=> Next Version
2015-12-10 11:48	Toady One	Resolution	open => fixed
2015-12-10 11:48	Toady One	Assigned To	Footkerchief => Toady One
2016-10-02 18:38	Loci	Relationship added	related to 0010026
2017-04-23 11:55	Loci	Relationship added	related to 0010208

Notes
(0016712) Footkerchief (manager) 2011-03-28 02:33	Reminder sent to: Drawde It would be extremely helpful to upload a save demonstrating this problem to http://dffd.wimbli.com/ [^]

(0016714) Kogut (reporter) 2011-03-28 05:31	Is it possible that you are constructing things from ice? It happened for me after melting of mined ice.

(0016748) Drawde (reporter) 2011-03-28 18:24	Done, under "Negative material distance" in the bugged saves section. I listed the steps I took to duplicate it. I had to remove the stairs in a room, the only way into it, and then tried rebuilding the stairs there. As I said, it doesn't always show up. But I think it's caused when some of the material is unreachable, but locked doors didn't seem to be enough to cause it.

(0016749) Footkerchief (manager) 2011-03-28 18:52	For ease of retrieval you can also link the file, like so: http://dffd.wimbli.com/file.php?id=4069 [^]

(0024580) smjjames (reporter) 2014-02-28 06:26	I had it happen once in relation to smoke blocking access. I forget the exact circumstances, but I think it happened when I tried to build something in an area that was covered by smoke. Or at least the smoke was either blocking the pathing or was blocking materials, don't remember exactly. I know it's not much to go on, but it's a possible lead to reproducing it.

(0029772) heritage727 (reporter) 2014-08-29 10:16	I've encountered this in 40.10 and have uploaded a save to http://dffd.wimbli.com/file.php?id=9557. [^] Smoke may have been a factor here as well--I had just had a dwarf incinerated by a fire imp nearby. Also, I noticed that each time I escaped from the selection menu and then reentered it, the distance would increase by an additional 1250000. Screenshots at http://i.imgur.com/2vbjyen.jpg [^] and http://i.imgur.com/2e780p6.jpg.> [^]

(0033030) Loci (manager) 2015-09-02 15:02	Confirmed in v0.40.24. This bug appears to occur when the path to a material is "soft invalidated", and resolve itself when the game is reloaded (and paths presumably recalculated). A reproducing scenario: designate one tile for channeling per z-level in a 2x1 area, alternating which tile on each z-level, such that each subsequent z-level "breaks" the ramp on the prior z-level. wait for your miner to dig down and produce some boulders designate a construction on the surface, and note the recently-produced boulders appear at the top of the list with negative distance.

(0033033) lethosor (manager) 2015-09-02 17:31	Thanks!

(0033732) Toady One (administrator) 2015-12-10 11:48	Cool - I also got it to happen with channels. Thanks for the reproducible procedure. There might be other configurations that cause this to happen, or something with water or cave-ins or whatever, but this is probably the main culprit, so I'll mark it off until we see it again.