Operating system: Win 10
Graphics card: Gtx 980
Blender 2.8 latest build
Worked: Blender 2.79b
Short description of error
A bone parented to another bone, can't drive the parent bendy bone values (easein, easeout...) without creating a dependency cycle (resulting in one frame lag, plus crashing Blender when many bones are setup this way). Since it is a common scenario when rigging characters, to add tweak controllers on characters, and it used to work fine in Blender 2.79, I would strongly recommend to consider it as a bug instead of a "feature". It would be a pain to rig without that working properly, and would totally break existing rigs from Blender 2.79.
Exact steps for others to reproduce the error
- Open the attached blend file:
- The left bone is parented to the right bone. It's driving its bendy values.
- Open the console, a dependency cycle is detected.
- Here is the file made in Blender 2.79, works fine