Dwarf Fortress Bug Tracker - Dwarf Fortress
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0004405Dwarf FortressUndeathpublic2011-03-31 08:052012-03-29 04:39
Toady One 
0004405: Ghosts can die of old age and dwarves who die of old age evidently cannot become ghosts.
from http://www.bay12forums.com/smf/index.php?topic=75255.15 [^]
For Toady: check source code (I assume that it is "design bug" and there is no special case for death from old age for ghosts)
death, ghosts
parent of 0004422resolved Toady One Historical Undeads can die of old age 
related to 0000972resolved Toady One Diplomat/liaison arrives, immediately dies of old age (and other old age issues) 
related to 0004623resolved Toady One <dwarven baby ghost name> has grown to become a Ghostly Dwarven Child 
Issue History
2011-03-31 08:05KogutNew Issue
2011-04-01 13:21FootkerchiefRelationship addedrelated to 0004422
2011-04-01 13:38FootkerchiefRelationship addedrelated to 0000972
2011-04-01 13:38FootkerchiefRelationship deletedrelated to 0004422
2011-05-09 08:41FootkerchiefRelationship addedrelated to 0004623
2012-02-20 00:08KogutTag Attached: ghosts
2012-02-22 00:42KogutTag Attached: death
2012-03-29 04:39Toady OneNote Added: 0021853
2012-03-29 04:39Toady OneStatusnew => resolved
2012-03-29 04:39Toady OneFixed in Version => 0.34.01
2012-03-29 04:39Toady OneResolutionopen => fixed
2012-03-29 04:39Toady OneAssigned To => Toady One
2012-03-29 05:49DwarfuRelationship addedparent of 0004422

Toady One   
2012-03-29 04:39   
As far as I can tell looking through the code, this was fixed with the big release. Feel free to reopen if it happens again.