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Join armatures results in lost drivers.
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Description

Simple example blend attached.

Two armatures: A and B

A bone's X location is driven by its Y location.

B bone's X location is driven by its Y location.

When the two armatures are joined together, only the active object armature retains its drivers.

Details

Type
Bug

Event Timeline

Confirmed here in linux with svn from today.

This is known todo: see http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Animation#Armature

closing.

It seems that drivers still remain there after joining armatures and will result a "driver has invalid target" console error. And that can't be fixed because these drivers don't show up in UI or can't be acessed from script because original related armature is gone. Would it be possible to remove or cleanup such faulty drivers sowehow?