Operating system: macOS 10.14.2
Graphics card: AMD Radeon R9 M395X 4096 MB
Broken: Blender 2.8 beta Feb 6th
Short description of error
Mirroring Grease Pencil keyframes in the Dopesheet fails if the current frame is within the area being mirrored
Exact steps for others to reproduce the error
Open this blend:
You can see it's an animation of a shape moving left to right. Mirroring the keyframes should make it go right to left.
- Place the playhead at frame 4 (or any frame inside the animation)
- Go to Frame > Mirror > By Times Over Current Frame
- Play back the animation
They keys are now broken
Manually scaling the keyframes by negative 1 works normally and gives correct results.