Krita Animation Second Edition had been released with lots of bug fixes. Krita is a robust, fast and flexible painting application that makes creating art from scratch or existing resources a fun and productive experience. With many powerful brush engines and unique features such as multihand, mirrored and wraparound painting, Krita explicitly supports creating illustrations, concept art, storyboards, textures, matte paintings and comic books.
Source Krita Homepage.
This is still based on the stable 2.9 version of Krita, though, not on what will become Krita 3.0. But there are a lot of crash fixes, bug fixes and improvements, and the following operations now work on animations as well
To install Krita just run the following commands via your systems Terminal.