Comment 26 for bug 1611078

Testing on Xenial with 4.8 Ubuntu kernel.

In container,
ubuntu@test:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial

ubuntu@test:~$ dpkg -l | grep -i 'apparmor\|snap\|squash'
ii apparmor 2.10.95-0ubuntu2.5 amd64 user-space parser utility for AppArmor
ii libapparmor-perl 2.10.95-0ubuntu2.5 amd64 AppArmor library Perl bindings
ii libapparmor1:amd64 2.10.95-0ubuntu2.5 amd64 changehat AppArmor library
ii snap-confine 2.20.1ubuntu1 amd64 Support executable to apply confinement for snappy apps
ii snapd 2.20.1ubuntu1 amd64 Tool to interact with Ubuntu Core Snappy.
ii squashfs-tools 1:4.3-3ubuntu2 amd64 Tool to create and append to squashfs filesystems
ii squashfuse 0.1.100-0ubuntu1~ubuntu16.04.1 amd64 FUSE filesystem to mount squashfs archives
ii ubuntu-core-launcher 2.20.1ubuntu1 amd64 Launcher for ubuntu-core (snappy) apps

sudo snap install hello-world
error: cannot perform the following tasks:
- Setup snap "core" (714) security profiles (cannot setup udev for snap "core": cannot reload udev rules: exit status 2