I have a classic snap installed, and two older revisions of it:
andreas@nsn7:~/git/packages/samba$ snap list --all git-ubuntu Name Version Rev Developer Notes git-ubuntu 0 206 nacc disabled,classic git-ubuntu 0 207 nacc disabled,classic git-ubuntu 0 209 nacc classic
Because the current snap is broken, I decided to revert. Note I didn’t pass
andreas@nsn7:~/git/packages/samba$ snap revert --revision=207 git-ubuntu git-ubuntu reverted to 0 andreas@nsn7:~/git/packages/samba$ snap list Name Version Rev Developer Notes asciinema 1.4.0 9 sabdfl classic canonical-livepatch 7 22 canonical - charm 2.2 15 charms classic core 16-2.27.5 2774 canonical core git-ubuntu 0 207 nacc classic ubuntu-image 1.1+snap3 75 canonical classic
Now the snap stopped working, with a lot of permission denied errors (see the pastebin for all of it):
09/01/2017 10:24:20 - ERROR:stderr: warning: unable to access '/home/andreas/.gitconfig': Permission denied (...) [ 5160.966933] audit: type=1400 audit(1504272252.972:92): apparmor="DENIED" operation="open" profile="snap.git-ubuntu.git-ubuntu" name="/home/andreas/.gitconfig" pid=32598 comm="git" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000
Turns out it was reverted as a confined snap, not classic. The
snap list output earlier above, after the
revert, is saying it’s classic. That in itself is probably a bug.
The other bug would be that it allowed the revert without
--classic to happen. I think it should either give the same kind of error you get when you try to install a classic snap without passing
--classic, or it should assume -
-classic on its own, since the version you are reverting to, already installed previously, was a classic snap with classic confinement.