The problem is that the apparmor systemd unit (and the script it calls)
exit if /rofs/etc/apparmor.d exists. This is correct in the general
case. What needs to happen is either snapd loads them itself or the
apparmor init scripts instead load just the snap-confine profiles.

** Also affects: apparmor (Ubuntu)
   Importance: Undecided
       Status: New

** No longer affects: ubiquity (Ubuntu)

** Changed in: apparmor (Ubuntu)
       Status: New => Triaged

** Changed in: apparmor (Ubuntu)
     Assignee: (unassigned) => Jamie Strandboge (jdstrand)

** Changed in: apparmor (Ubuntu)
       Status: Triaged => Confirmed

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https://bugs.launchpad.net/bugs/1751667

Title:
  classic snap does not run on live session

Status in apparmor package in Ubuntu:
  Confirmed
Status in snapd package in Ubuntu:
  Confirmed

Bug description:
  I'm testing Ubuntu Budgie's classic snap called "ubuntu-budgie-
  welcome" which is available in the beta channel.

  Ubuntu Budgie 18.04 daily ISO 25/02/2018

  The snap works just fine on a normal install.  However this classic
  snap fails on the Ubuntu Budgie live session. As snaps become more
  prevalent - snaps - including classic snaps should work on live
  sessions.

  For Ubuntu Budgie, the classic snap is very important because it
  presents the user vital info about the distro and instructions on how
  to install.

  Copying the .desktop launcher from the menu I see the following issue
  in a terminal:

  ubuntu-budgie@ubuntu-budgie:~$ env 
BAMF_DESKTOP_FILE_HINT=/var/lib/snapd/desktop/applications/ubuntu-budgie-welcome_budgie-welcome.desktop
 /snap/bin/ubuntu-budgie-welcome.budgie-welcome %U
  snap-confine has elevated permissions and is not confined but should be. 
Refusing to continue to avoid permission escalation attacks

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: snapd 2.31.1+18.04
  ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
  Uname: Linux 4.15.0-10-generic x86_64
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  CasperVersion: 1.388
  CurrentDesktop: Budgie:GNOME
  Date: Sun Feb 25 23:28:38 2018
  LiveMediaBuild: Ubuntu-Budgie 18.04 LTS "Bionic Beaver" - Alpha amd64 
(20180225)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: snapd
  UpgradeStatus: No upgrade log present (probably fresh install)

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