The new User.hasDesktopGroups tries to add a user to the group debian-tor which fails if this group does not exist.
What package creates this group? If someone could let me know that, I will patch User.hasDesktopGroups to only try to add a user to debian-tor if Apt.isInstalled "blah" is true.
Or perhaps Joey added this group because this group exists by default on Debian Unstable. If so then a check can be inserted for that.
Noticed that too and made it only add the user to existant groups, which is the same approach user-setup uses. done --Joey