0003912: Chains do not prevent removal of creature by fluid flow, and become unusable after creature removed.

Dwarf Fortress Bug Tracker - Dwarf Fortress

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Date Submitted

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0003912

Dwarf Fortress

Dwarf Mode -- Buildings, Cages and Chains

public

2011-01-28 20:30

2014-08-28 11:42

Reporter

ellindsey

Assigned To

Priority

normal

Severity

minor

Reproducibility

have not tried

Status

new

Resolution

open

Platform

Windows Vista

OS Version

Product Version

0.31.18

Target Version

Fixed in Version

Summary

0003912: Chains do not prevent removal of creature by fluid flow, and become unusable after creature removed.

Description

1. Chains are purely mind control devices - they prevent creatures from pathing away on their own, but do not do anything to prevent a creature from being removed from the chain by any other means that may push creatures around. In this case, I experienced this bug with fluid flow, but the same is true if the creature is flung by a bridge, smashed by a hammerdwarf, knocked around by cave-in dust, etc.

2. The actual bug I've just discovered it that when a creature is pushed off a chain this way, it becomes impossible to ever actually chain a creature to that chain again. You can assign a creature to the chain, but the dwarves will never, ever actually chain it up. I suspect that some flag which marks the chain as occupied never gets cleared in memory when the creature chained up is pushed off the chain, and so a new creature can never be attached. I had to deconstruct and reconstruct the chain to make it usable again.

Steps To Reproduce

Chain a creature to a chain. Flow water through the area, pushing the creature away from the chain. Once the creature is showing as no longer attached to the chain, unassign that creature from the chain. Shut off the water flow, make the chain accessible, and then reassign that or a different creature to the chain. Watch as your twenty idle dwarves refuse to chain the creature. Deconstructing and reconstructing the chain clears the bug.

Additional Information

Discovered while breeding sea serpents chained up in water-filled pens.

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No tags attached.

Relationships

related to	0000374	new		Deconstructing a restraint (chain/rope) with an animal tethered ends up leaving the restraint on the animal
related to	0003327	new		Creatures can pathfind, move and get flow-pushed through submerged fortifications

Attached Files

Issue History

Date Modified

Username

Field

Change

2011-01-28 20:30

ellindsey

New Issue

2014-01-27 14:54

Footkerchief

Relationship added