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0009267Dwarf FortressDwarf Mode -- Tradepublic2015-12-07 14:542016-06-07 14:20
0009267: Traders bring magma in bags.
Traders have been consistently bringing magma in bags for the past few years of my fort.
The result is a yearly fire that burns down the surrounding countryside and a lot of trees collapsing.
Can be pretty devastating.
Magma is worth 10 dwarf bucks
No tags attached.
related to 0009219resolved Toady One Dye stored in barrels without bags 
has duplicate 0009878resolved Dwarfu Human traders bring forest fires 
Issue History
2015-12-07 14:54KaetNew Issue
2015-12-07 15:08DwarfuNote Added: 0033600
2015-12-07 15:08DwarfuAssigned To => Dwarfu
2015-12-07 15:08DwarfuStatusnew => needs feedback
2015-12-07 15:08DwarfuRelationship addedrelated to 0009219
2015-12-07 15:30KaetNote Added: 0033604
2015-12-07 15:30KaetStatusneeds feedback => assigned
2015-12-13 07:16PauvenNote Added: 0033833
2015-12-13 07:17PauvenNote Edited: 0033833bug_revision_view_page.php?bugnote_id=0033833#r13639
2015-12-13 07:22DwarfuNote Added: 0033834
2015-12-13 07:22DwarfuStatusassigned => confirmed
2016-06-07 14:20Toady OneNote Added: 0035371
2016-06-07 14:24DwarfuIssue Monitored: Dwarfu
2017-01-15 15:30HuntthetrollIssue Monitored: Huntthetroll
2017-11-19 22:18DwarfuRelationship addedhas duplicate 0009878

2015-12-07 15:08   
Reminder sent to: Kaet

Are you using any 3rd party utilities or mods or is this vanilla DF? Do you have a save demonstrating this issue?
2015-12-07 15:30   
The only change is I installed the phoebus graphics pack.
Oh and I made dolomite the only flux, to make it easier to find, and removed Aquifers from most everything.

Heres a save with traders just arriving.
http://dffd.bay12games.com/file.php?id=11413 [^]
2015-12-13 07:16   
(edited on: 2015-12-13 07:17)
I can confirm this happening twice in my game. The only modification is a graphics pack, no changes to any materials or whatever.

Trader arrived with a silk bag with 10 magma in it. The first time it happened, two fires started, one on the edge of the map where the traders came through, the other on my wooden trading depot. The second time fire only my depot.

Above-ground depots means that the whole map catches on fire due to the trader running about with a silk bag full of magma. Also, trees collapse and the burning roots make holes in the ground.

Both times were on dwarven wagons.

2015-12-13 07:22   
Thanks for the save/follow-up.
Toady One   
2016-06-07 14:20   
The civilization has a powder material that is set to magma. I can't get it to reproduce in new worlds. It's possibly coming from some sort of broken reaction definition that produces material-free powder, but it would have to be a generated one or modded, and I can't find any generated one that would trigger it. The best I can do is patch out the behavior for now, and wait for more leads.