Dwarf Fortress Bug Tracker - Dwarf Fortress
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IDProjectCategoryView StatusDate SubmittedLast Update
0004529Dwarf FortressDwarf Mode -- Stockpilespublic2011-04-15 01:182014-01-27 14:24
Reporterlando242 
Assigned To 
PrioritynormalSeverityminorReproducibilityhave not tried
StatusnewResolutionopen 
PlatformOSOS Version
Product Version0.31.25 
Target VersionFixed in Version 
Summary0004529: Removing old stockpiles causes underground tree saplings underneath them to mature instantly.
DescriptionI placed a stockpile over an underground silt floor when I first started digging underground. Later I broke threw the cavern layer and underground plants started to grow in that part of my fortress. The stockpile itself didn't have plants growing threw it but once I removed the stockpile a number of saplings that were underneath immediately matured to full trees. The stockpile was empty at the time of its removal.
Steps To ReproducePlace a stockpile over a patch of underground soil.
Discover the cavern layers to underground plants start growing inside your fortress.
Remove the stockpile several years later.
Watch fully mature trees spring up.
Additional InformationI have not tried this with aboveground trees.
TagsNo tags attached.
Relationships
related to 0002785new  Tree grows suddenly on top of constructed wall 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2011-04-15 01:18lando242New Issue
2011-04-15 05:39Logical2uNote Added: 0017387
2011-04-15 06:04QuietustNote Added: 0017388
2011-04-15 08:40Granite26Note Added: 0017391
2014-01-27 14:24FootkerchiefRelationship addedrelated to 0002785

Notes
(0017387)
Logical2u   
2011-04-15 05:39   
Are you sure the trees hadn't already grown, but rather the stockpile symbol prevented the full tree symbol from being displayed?
(0017388)
Quietust   
2011-04-15 06:04   
This behavior has actually been present since 0.28.181.40d and earlier - saplings will appear beneath buildings (and stockpiles count as buildings) and items such that removing the building/item will cause it to instantly mature to full size. The same thing happens when submerged in water - if the water depth drops low enough, the tree will instantly grow up if it's been there long enough.
(0017391)
Granite26   
2011-04-15 08:40   
Is it possible that the real issue is the sapling would normally have matured, but is prevented from doing so by the building? Then, when the building is removed, the check to mature no longer fails because there's a building in the way?

The way to test for this: does it only occur when the sapling has been around for a long time?