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[Stoup]

I have a garbage dump set up so that my dwarves walk into a one-tile ramped room to drop off anything I choose to dump. This is covered with a hatch, which works wonders for keeping the miasma down where it belongs. However, I just noticed that now that one-tile room is entirely empty, and all the contents of it are now 10 blocks away, a little to the southwest of where they all previously were. I'm working on constructing a small addition to the cliffside of that part of my fortress, but the 1-tile room remains unbreached and the items are still forbidden, as if they'd just teleported there.

Any idea what happened? Should I take this to Mantis?

[WealthyRadish]

I've had this happen as well, and I've heard of it happening to others. Did you deconstruct anything when it happened? In my case, deconstructing a wall randomly schlooped 600 nearby metal bars onto a one tile wide area.

[Stoup]

In fact I did, I had removed a wall that I could build some scaffolding stairs to roof the top of the extension off. My dwarves are now hard at work hauling everything back, but that's a very strange glitch indeed...

[EvilBob22]

Same here, except a deconstructed floor instead of a wall.  I'm guessing it is related to the new code that brings the building material -- and anything else on the constructed tile -- to the deconstructor's tile instead of having it fall in place.

[Garath]

yup, known bug

[krenshala]

I just realized, this can be used to quantum dump items from your workshop!

1] Build a wall adjacent to where you want the stuff to be quantum-stacked, preferably with other obstacles to prevent the wall deconstructor from standing anywhere else.
2] Make, dump or haul all the items you want within 8 tiles of that (in a square), so 17 tiles a side, with the target tile in the center
3] When you are ready, deconstruct the wall and everything loose withing 8 tiles of the worker's tile will be moved to the tile the worker is standing on.

I'm not sure, but it may pull bins as well.  I've only had it happen above ground, so it was part of my refuse pile that got translated.  I also don't think it affects items still in a workshop, but I'm not positive on that.

[Urist Da Vinci]

I just realized that we might be able to exploit this bug to retrieve items from a zombie death pit without having to open it - just teleport the items out instead.

[krenshala]

I don't think they translate over different z-levels, but walls definitely don't prevent it, so it wshould work.

[Tsuchigumo550]

Minecart tracks are doing this to me too, but it was piles magically vaporizing the contents (or a very sneaky teleport).

[Jacob/Lee]

I had a large pile of bodies sitting in a room where I intended to use it as a zombie chamber to release on the goblins. For some unknown reason all the bodies teleported to the southeast (I had a dump set 1 z above so the dwarves would throw the corpses down a hatch) and outside of the room. They then collected the bodies and put it in refuse. Odd...

[lcy03406]

I just realized, this can be used to quantum dump items from your workshop!

1] Build a wall adjacent to where you want the stuff to be quantum-stacked, preferably with other obstacles to prevent the wall deconstructor from standing anywhere else.
2] Make, dump or haul all the items you want within 8 tiles of that (in a square), so 17 tiles a side, with the target tile in the center
3] When you are ready, deconstruct the wall and everything loose withing 8 tiles of the worker's tile will be moved to the tile the worker is standing on.

I'm not sure, but it may pull bins as well.  I've only had it happen above ground, so it was part of my refuse pile that got translated.  I also don't think it affects items still in a workshop, but I'm not positive on that.

New science? Does it exactly work as this? Does it ALWAYS teleport ALL items within EIGHT tiles?

[Quietust]

When a dwarf removes a construction, it's supposed to take the items from that tile and move them to wherever the dwarf is standing so that they don't fall down and hit somebody on the head (possibly that same dwarf, if he was removing a construction from below). The bug is that Toady forgot to add the part where it checks the item coordinates, so it does this to every item in the 16x16 map block. It has nothing to do with the distance from the construction tile, just the grid cell in which the construction was located.

Incidentally, angavrilov (one of the DFHack developers) wrote a pair of binary patches to fix this problem on both Windows and Linux.

[Mr S]

Are those patches intended to be applied using the Interactive Disassembler referenced?

[Quietust]

That, or using a hex-editor.

[Mr S]

Thanks.  I'll have to look into that IDA.  I've done hex patching on other things, but will be my first whack for DF.  Backup and try it!!