Dwarf Fortress Bug Tracker - Dwarf Fortress
View Issue Details
IDProjectCategoryView StatusDate SubmittedLast Update
0004013Dwarf FortressVegetationpublic2011-02-18 07:452016-12-10 09:50
ReporterQuietust 
Assigned ToToady One 
PrioritynormalSeverityminorReproducibilityhave not tried
StatusassignedResolutionreopened 
PlatformOSOS Version
Product Version0.31.19 
Target VersionFixed in Version0.31.22 
Summary0004013: Areas of plain "grass" in caverns
DescriptionI embarked in an ordinary region and revealed the map, and upon examining the lower cavern layers I discovered several square regions filled with generic "grass" (i.e. the same sort found above ground in 0.31.18 and earlier) while the rest of the caverns were properly covered with floor fungus and cave moss. The grass areas were still filled with appropriate plant life (cave plants and trees appropriate to the cavern layer).
Steps To Reproduce
Additional Information
TagsNo tags attached.
Relationships
has duplicate 0006384resolved Footkerchief Large area of plain 'grass' deep underground 
has duplicate 0009607resolved Loci Underground Grass (in darkness) 
related to 0003957resolved Toady One Normal grass can grow underground 
related to 0004130resolved Toady One Digging/mining (in soil?) causes crash on non-Windows systems 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2011-02-18 07:45QuietustNew Issue
2011-02-18 08:28FootkerchiefRelationship addedrelated to 0003957
2011-02-18 10:37QuietustNote Added: 0015243
2011-02-28 14:04Toady OneStatusnew => resolved
2011-02-28 14:04Toady OneFixed in Version => 0.31.20
2011-02-28 14:04Toady OneResolutionopen => fixed
2011-02-28 14:04Toady OneAssigned To => Toady One
2011-03-06 12:11FootkerchiefAssigned ToToady One =>
2011-03-06 12:11FootkerchiefStatusresolved => new
2011-03-06 12:13FootkerchiefIssue Monitored: Toady One
2011-03-06 12:13FootkerchiefNote Added: 0015833
2011-03-06 15:26FootkerchiefRelationship addedrelated to 0004130
2011-03-21 21:46veokNote Added: 0016465
2011-03-22 01:24Toady OneNote Added: 0016467
2011-03-22 01:24Toady OneStatusnew => resolved
2011-03-22 01:24Toady OneFixed in Version0.31.20 => 0.31.22
2011-03-22 01:24Toady OneAssigned To => Toady One
2012-03-21 18:25DwarfuRelationship addedhas duplicate 0005580
2012-03-21 18:26DwarfuRelationship deletedhas duplicate 0005580
2013-10-29 12:00FootkerchiefStatusresolved => needs feedback
2013-10-29 12:00FootkerchiefResolutionfixed => reopened
2013-10-29 12:01FootkerchiefRelationship addedhas duplicate 0006384
2013-10-31 12:30smjjamesNote Added: 0024185
2013-10-31 12:30smjjamesNote Edited: 0024185bug_revision_view_page.php?bugnote_id=0024185#r9002
2013-10-31 12:36smjjamesNote Edited: 0024185bug_revision_view_page.php?bugnote_id=0024185#r9003
2013-10-31 12:39smjjamesNote Edited: 0024185bug_revision_view_page.php?bugnote_id=0024185#r9004
2013-10-31 12:47smjjamesNote Edited: 0024185bug_revision_view_page.php?bugnote_id=0024185#r9005
2013-10-31 12:52smjjamesNote Edited: 0024185bug_revision_view_page.php?bugnote_id=0024185#r9006
2013-10-31 12:57QuietustNote Added: 0024186
2013-10-31 12:57QuietustStatusneeds feedback => assigned
2013-10-31 12:59QuietustNote Edited: 0024186bug_revision_view_page.php?bugnote_id=0024186#r9008
2013-10-31 13:17smjjamesNote Added: 0024187
2013-10-31 13:21smjjamesNote Edited: 0024187bug_revision_view_page.php?bugnote_id=0024187#r9010
2013-10-31 13:30smjjamesNote Edited: 0024187bug_revision_view_page.php?bugnote_id=0024187#r9011
2013-10-31 13:57smjjamesNote Edited: 0024187bug_revision_view_page.php?bugnote_id=0024187#r9012
2013-10-31 14:00smjjamesNote Edited: 0024187bug_revision_view_page.php?bugnote_id=0024187#r9013
2013-10-31 14:02smjjamesNote Edited: 0024187bug_revision_view_page.php?bugnote_id=0024187#r9014
2013-10-31 14:02smjjamesNote Edited: 0024187bug_revision_view_page.php?bugnote_id=0024187#r9015
2013-10-31 14:19smjjamesNote Edited: 0024187bug_revision_view_page.php?bugnote_id=0024187#r9016
2013-10-31 14:32smjjamesNote Added: 0024188
2013-10-31 14:34smjjamesNote Edited: 0024188bug_revision_view_page.php?bugnote_id=0024188#r9018
2013-10-31 14:59smjjamesNote Edited: 0024188bug_revision_view_page.php?bugnote_id=0024188#r9019
2013-10-31 15:00smjjamesNote Edited: 0024188bug_revision_view_page.php?bugnote_id=0024188#r9020
2013-11-01 09:07smjjamesNote Edited: 0024188bug_revision_view_page.php?bugnote_id=0024188#r9021
2013-11-01 12:08smjjamesNote Added: 0024192
2014-09-01 14:22FootkerchiefNote Added: 0029870
2014-09-01 14:22FootkerchiefStatusassigned => needs feedback
2014-10-21 00:52PatrikLundellNote Added: 0030695
2014-10-21 05:29PatrikLundellNote Edited: 0030695bug_revision_view_page.php?bugnote_id=0030695#r12095
2016-12-08 12:32PatrikLundellNote Edited: 0030695bug_revision_view_page.php?bugnote_id=0030695#r14545
2016-12-08 20:11LociRelationship addedhas duplicate 0009607
2016-12-08 20:12LociStatusneeds feedback => assigned
2016-12-10 09:50QuietustNote Added: 0036082
2017-06-08 19:25HuntthetrollIssue Monitored: Huntthetroll

Notes
(0015243)
Quietust   
2011-02-18 10:37   
Generic grass has also been observed growing in caverns that were otherwise entirely devoid of plant life, while other "dry" caverns consist of muddy stone.
(0015833)
Footkerchief   
2011-03-06 12:13   
Reminder sent to: Toady One

Oops, I reopened the wrong report for the generic-grass-in-caverns bug that resurfaced in 31.20. nirreln uploaded a save at 0003957:0015821.
(0016465)
veok   
2011-03-21 21:46   
I have two saves featuring the "grass" in the caverns. I don't know if it's related or not, but both embarks featured "a cave in has occurred" and an immediate pause upon embark.

http://dffd.wimbli.com/file.php?id=4014 [^]
(0016467)
Toady One   
2011-03-22 01:24   
I fixed the world from the comment in 0003957 and that should capture a large swath (and hopefully all) of what's going on here.
(0024185)
smjjames   
2013-10-31 12:30   
(edited on: 2013-10-31 12:52)
I encountered the same bug deep underground in the third cavern as an adventurer.

I intially found a smaller patch of the same thing about a minute or less travel to the south and decided to just ignore it until BAM, I hit this huge area of it close by. Also, using DFhack reveal all, I can see that there is grass in the first and second caverns as well. The surface biome is a desert.

Edit: further exploration shows the grassy area to be very extensive, maybe biome-wide?

Edit2: Finally found a demon fort, although complete lack of zombies, related?

http://dffd.wimbli.com/file.php?id=8097 [^]

I'm also having trouble finding another demon fortress after finding two (niether one had access), but that could just be due to luck.

Also, just a note, when I tried to regen this world, it regenned the history a bit differently for some reason. Haven't investigated the same region on the regenned world though.
(0024186)
Quietust   
2013-10-31 12:57   
(edited on: 2013-10-31 12:59)
Some brief examination of that save using DFHack indicates that the cavern does have grass populations in it (the cavern is underground region 184, and its feature populations 11 and 12 are grasses with plant glosses 35 and 36, "CAVE MOSS" and "FLOOR FUNGI"), so it shouldn't be an issue of it being unable to find a valid grass type to create.
(0024187)
smjjames   
2013-10-31 13:17   
(edited on: 2013-10-31 14:19)
Okay, this is wierd, after finding the second demon fortress in the same grassy region (which didn't trigger the popup, but DFhacks reveal might be to blame as I found the previous one normally), which ALSO had no zombies and there appears to be no demons either. The previous one which was also in the grassy region didn't have zombies, but I decided not to wait around for the demons in that one.

On the regen of that world, I did run into a fort without zombies, but that one wasn't in a grassy area and there wasn't access to the level with the candy weapon while this one did have access.

I know it's an entirely separate bug onto itself, but it seems to be connected to the grassy area somehow since the previous one didn't have zombies and access to the adamantine weapon.

Investigating how far down the hell passage goes at the time of posting.

http://dffd.wimbli.com/file.php?id=8098 [^]

Edit: It goes all the way down to the ground floor of hell and there are openings to the surrounding hell terrain so it's not hermetically sealed. Wandered around close by and a few demons revealed themselves, so there are demon populations in the surrounding area, just not within the demon fortress itself.

Edit: I looked around and didn't find any bug report regarding what I'm seeing with these two fortresses and since it seems to be tied with the main issue here, I won't make a separate bug report unless you guys would like me to make one.
(0024188)
smjjames   
2013-10-31 14:32   
(edited on: 2013-11-01 09:07)
Decided to look around for another fort to contribute to analysis on this bug and found one with the same conditions, no zombies or demons and not hermetically sealed.

http://dffd.wimbli.com/file.php?id=8099 [^]

I'll try to find an accessable fort outside the grassy region to check if it's not a problem with the world itself.

Edit: This is getting stranger and stranger, I found another fort in a non 'grassy' area and there aren't any zombies or demons either. I'll make a zip of this spot in case you guys request that I put up the save of this location and then make my way back to the surface and then go underground in an area far from the region I'm currently in to eliminate a regional thing.

Edit2: Found an accessable fort in a region on the opposite side of the world map and no zombies or demons there either. It's looking like it is a problem with the world.
(0024192)
smjjames   
2013-11-01 12:08   
While making my way out of the caverns, I spotted a bit of green on the floor of a pit. Turned out to be longland grass shrubs, one of which died while I was looking around the area.

The surrounding region is normal, so it's not a part of a larger 'grass' region, but since it's the same save as the one I linked earlier, it can provide information about whatever made them generate.

http://dffd.wimbli.com/file.php?id=8104 [^]
(0029870)
Footkerchief   
2014-09-01 14:22   
Is this bug still present?
(0030695)
PatrikLundell   
2014-10-21 00:52   
(edited on: 2016-12-08 12:32)
I believe so. I spotted a piece of suspicious green color in my dining room corner (only non stone floor tile), looked at it, and saw it said "grass", which sent me into a panicky search for the tree attack breach, but I found none. A further look in my fortress uncovered a second grass tile (large sand layer a few levels below the ground). Both of these have been colonialized as a result of breaching the caverns. A manual search has failed to locate any grass in the caverns themselves (upper level breached only), but a certain validation would require the use of some script to automatically examine every tile, I assume.

Further info: Don't know if it's related, but it's turned winter, and both grass patches I had have disappeared. The dining room one into bare clay floor, the other one probably into a bare floor. I tried to create a farm on top of a third grass patch, and attempting to plant on it allows me to plant only underground crops (as expected), but it's turned winter as well before I attempted to plant.

Edit: Looked at the issue again, and first entered the below in report 0009607 before looking further to retrieve this one.

I just looked at a case in a 0.43.05 32 bit game using DFHack, and as far as I can determine, the df.global.world.plants.all array lacks the grass plant entry that should be there (nothing referring to those coordinates), while the two <map_tile_block>.block_event array entries for grass have their "amount" value for the tile set to 0.
(0036082)
Quietust   
2016-12-10 09:50   
I'm pretty sure the vector DFHack knows as "df.global.world.plants.all" is totally irrelevant - it contains only "vegst" objects (at least that's what they were called back in 40d) which I'm fairly certain only ever refer to trees and shrubs, never grass (which is tracked using block_square_event_grassst).