0007790: Cave in when loading save - Dwarf Fortress Bug Tracker

(0028116)
Button (reporter)
2014-08-01 19:26

Possibly related to 0006432

(0028133)
Dwarfu (manager)
2014-08-02 05:20

Reminder sent to: torrenal

Was there a previous cave-in at that location?

(0028135)
Dwarfu (manager)
2014-08-02 05:22

If ice is supporting dirt that is later unsupported when the ice melts - that is exactly an expected cave-in situation.

(0028147)
torrenal (reporter)
2014-08-02 10:35
edited on: 2014-08-02 10:36

The only other caveins near there broke through into the cistern and were patched with proper floor tiles. They had been a result of me designating the L2 layer for digging, then later designating L1 for channeling - to try and recover any ice for use in the fortress.

The cavein-on-load is just to the east of those patches and does not involve them. No other caveins occurred during work on the ice.

(0028151)
Dwarfu (manager)
2014-08-02 11:15

Ok, it may very well be the same root cause, but I'll leave it as a child of the other report. Thanks for the follow-ups.

(0028165)
torrenal (reporter)
2014-08-02 14:17

Ah. It's the 'Brook'
'Brook' is essentially a floor that rests on the ice. I channeled out all around the brook, and dug out the ice under it, but the 'brook' rested on the 'ice floor' of the river.

Spring thaw comes. Ice turns to water, no longer supporting the 'brook'.

Save game - load game, brook is checked for cave-in and collapses. I've now recreated this in a pocket world, saved just prior to thaw if you want.

(0028170)
Footkerchief (manager)
2014-08-02 15:06

Yeah, it's intentional for now that brook tiles can collapse like other floors.

Issue History
Date Modified	Username	Field	Change
2014-08-01 18:29	torrenal	New Issue
2014-08-01 18:29	torrenal	Issue Monitored: torrenal
2014-08-01 19:26	Button	Note Added: 0028116
2014-08-02 05:20	Dwarfu	Note Added: 0028133
2014-08-02 05:21	Dwarfu	Relationship added	child of 0007277
2014-08-02 05:22	Dwarfu	Note Added: 0028135
2014-08-02 05:22	Dwarfu	Assigned To	=> Dwarfu
2014-08-02 05:22	Dwarfu	Status	new => needs feedback
2014-08-02 10:35	torrenal	Note Added: 0028147
2014-08-02 10:35	torrenal	Status	needs feedback => assigned
2014-08-02 10:36	torrenal	Note Edited: 0028147	View Revisions
2014-08-02 11:15	Dwarfu	Note Added: 0028151
2014-08-02 11:15	Dwarfu	Status	assigned => acknowledged
2014-08-02 14:17	torrenal	Note Added: 0028165
2014-08-02 15:06	Footkerchief	Note Added: 0028170
2014-08-02 15:06	Footkerchief	Status	acknowledged => resolved
2014-08-02 15:06	Footkerchief	Resolution	open => no change required
2014-08-02 19:16	torrenal	Issue End Monitor: torrenal

Notes
(0028116) Button (reporter) 2014-08-01 19:26	Possibly related to 0006432

(0028133) Dwarfu (manager) 2014-08-02 05:20	Reminder sent to: torrenal Was there a previous cave-in at that location?

(0028135) Dwarfu (manager) 2014-08-02 05:22	If ice is supporting dirt that is later unsupported when the ice melts - that is exactly an expected cave-in situation.

(0028147) torrenal (reporter) 2014-08-02 10:35 edited on: 2014-08-02 10:36	The only other caveins near there broke through into the cistern and were patched with proper floor tiles. They had been a result of me designating the L2 layer for digging, then later designating L1 for channeling - to try and recover any ice for use in the fortress. The cavein-on-load is just to the east of those patches and does not involve them. No other caveins occurred during work on the ice.

(0028151) Dwarfu (manager) 2014-08-02 11:15	Ok, it may very well be the same root cause, but I'll leave it as a child of the other report. Thanks for the follow-ups.

(0028165) torrenal (reporter) 2014-08-02 14:17	Ah. It's the 'Brook' 'Brook' is essentially a floor that rests on the ice. I channeled out all around the brook, and dug out the ice under it, but the 'brook' rested on the 'ice floor' of the river. Spring thaw comes. Ice turns to water, no longer supporting the 'brook'. Save game - load game, brook is checked for cave-in and collapses. I've now recreated this in a pocket world, saved just prior to thaw if you want.

(0028170) Footkerchief (manager) 2014-08-02 15:06	Yeah, it's intentional for now that brook tiles can collapse like other floors.