0004600: Items frozen in ice are unrecoverable; building on previously iced square crashes game. - Dwarf Fortress Bug Tracker

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ID

Project

Category

View Status

Date Submitted

Last Update

0004600

Dwarf Fortress

Dwarf Mode -- Items

public

2011-05-01 09:30

2017-11-02 15:44

Reporter

Jarhyn

Assigned To

Toady One

Priority

urgent

Severity

crash

Reproducibility

always

Status

resolved

Resolution

fixed

Platform

OS

Windowws

OS Version

windows 7

Product Version

0.31.25

Target Version

Fixed in Version

0.40.09

Summary

0004600: Items frozen in ice are unrecoverable; building on previously iced square crashes game.

Description

I reclaimed a fortress, and all my old fortress's stuff was strewn about, sometimes atop frozen murky pools. Spring rolled around, and I left it there, where it fell into the ice. Another year passed, and the stuff got frozen into the ice. But when the spring thaw came, the stuff was just gone, but still showed on the stocks screen. I later dug out the entire level, floored over the top of the lakes, and then built a building on one of the squares where stuff had been lost, and it crashed my game. I was unable to get my dwarves to dump the items that had been lost despite the tile being accessible.

Steps To Reproduce

designate a dump zone or otherwise engineer a square that will freeze to contain an item before freezing. Allow the original ice block to thaw(not sure if this is necessary), and then either allow to refreeze, or empty the water out of the tile. Build on that tile->crash.

Additional Information

It appears as if the game places the items frozen into a container (using DFHack, there was an on_ground flag that was set false). Thawing or mining the ice block there SHOULD unset the on_ground flag and make all the stuff get dumped back out again but it doesn't. The easiest solution would be to have thawing ice check it's square for items that are not set on_ground, and then set them to be on_ground, and do the same for mining out the block.

Tags

build, construction, container, crash, dig, Fixed in 0.40.09?, Frozen, ice, thaw

Relationships

related to	0000895	resolved	Toady One	Items disappear (become invisible) after getting pushed by flowing water, burning in magma, or encased in ice
has duplicate	0006436	resolved	Footkerchief	Items frozen into ice which then melts vanish until the tile is re-frozen and mined

Notes
(0017592) Jarhyn (reporter) 2011-05-01 09:37	Currently I'm testing to see if setting all items to be on_ground is sufficient to make them fall out of the offending square onto the ground

(0018088) Dwarfu (manager) 2011-06-28 14:10	This is mostly a duplicate of 0000895, but the crash on construction is new, so I'm going to make this a child.

(0029044) Toady One (administrator) 2014-08-14 12:27	0000895 is fixed, but it is hard to say if this is fixed. 0.40.09+ checks would be useful, if possible.

(0036839) Loci (manager) 2017-11-02 15:44	v0.43.05x32: Frozen items do not disappear (0000895), and dwarves correctly move those items before completing a construction in the tile (or suspend the job if unable to move the items).

Issue History
Date Modified	Username	Field	Change
2011-05-01 09:30	Jarhyn	New Issue
2011-05-01 09:36	Jarhyn	Tag Attached: construction
2011-05-01 09:36	Jarhyn	Tag Attached: container
2011-05-01 09:36	Jarhyn	Tag Attached: crash
2011-05-01 09:36	Jarhyn	Tag Attached: dig
2011-05-01 09:36	Jarhyn	Tag Attached: Frozen
2011-05-01 09:36	Jarhyn	Tag Attached: ice
2011-05-01 09:36	Jarhyn	Tag Attached: build
2011-05-01 09:36	Jarhyn	Tag Attached: thaw
2011-05-01 09:37	Jarhyn	Note Added: 0017592
2011-06-28 14:10	Dwarfu	Note Added: 0018088
2011-06-28 14:10	Dwarfu	Relationship added	child of 0000895
2014-02-17 11:18	Footkerchief	Relationship added	has duplicate 0006436
2014-08-14 12:27	Toady One	Relationship replaced	related to 0000895
2014-08-14 12:27	Toady One	Note Added: 0029044
2014-08-14 12:40	Footkerchief	Assigned To	=> Footkerchief
2014-08-14 12:40	Footkerchief	Status	new => needs feedback
2014-08-14 12:41	Footkerchief	Tag Attached: Fixed in 0.40.09?
2017-11-02 15:44	Loci	Note Added: 0036839
2017-11-02 15:44	Loci	Status	needs feedback => resolved
2017-11-02 15:44	Loci	Fixed in Version	=> 0.40.09
2017-11-02 15:44	Loci	Resolution	open => fixed
2017-11-02 15:44	Loci	Assigned To	Footkerchief => Toady One

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