Indeed this is expected behavior. Since there is no way to
create a btrfs subvolume in this instance, and you explicitly
asked for a btrfs subvolume, it should error. A simple directory
copy must be used.
I think it might be reasonable to say that even if it has to
do a full directory copy, it
Public bug reported:
## Version
Description:Ubuntu 15.04
Release:15.04
lxc:
Installed: 1.1.2-0ubuntu3.1
Candidate: 1.1.2-0ubuntu3.1
Version table:
*** 1.1.2-0ubuntu3.1 0
500 http://us.archive.ubuntu.com/ubuntu/ vivid-updates/main amd64
Packages
500