This bug was fixed in the package docker.io - 20.10.7-0ubuntu1~18.04.1
--------------- docker.io (20.10.7-0ubuntu1~18.04.1) bionic-security; urgency=medium
* Backport version 20.10.7-0ubuntu1 from Impish (LP: #1938908). - d/control: do not b-d on libbtrfs-dev, it is not available in Bionic.
-- Lucas Kanashiro <email address hidden> Wed, 04 Aug 2021 16:22:59 -0300
This bug was fixed in the package docker.io - 20.10.7- 0ubuntu1~ 18.04.1
--------------- 7-0ubuntu1~ 18.04.1) bionic-security; urgency=medium
docker.io (20.10.
* Backport version 20.10.7-0ubuntu1 from Impish (LP: #1938908).
- d/control: do not b-d on libbtrfs-dev, it is not available in Bionic.
-- Lucas Kanashiro <email address hidden> Wed, 04 Aug 2021 16:22:59 -0300