Broken: .80, 1dab26afb9c8, 2018-06-19
Short description of error
Changeing properties of bones cause errors and links in drivers break
Exact steps for others to reproduce the error
Create a Armature
Select the existing bone
Enter Pose mode
Select Bone in the Property window
Add a custom property
Edit the property
When confirming the change a lot of errors occur.
Everything seems to work, except that connections to drivers will break as well.