[Bug 1490110] Re: package lxc 1.1.3-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 100

[Huygens]

I had the same problem while upgrading from 15.04 to 15.10 today.
I had 1 ppa installed on this system (ppa:ubuntu-lxc/stable) which I reverted before doing the upgrade using the ppa-purge tool.
After purging this ppa from my system, I proceeded with the upgrade and it failed like this bug report mention.

As for the 2 commands they return both the same thing (note that I run
these 2 commands after having done "sudo apt update; sudo apt upgrade"
which seems to have fixed the lxc and lxc-template set up):

$ sudo systemctl status lxc
● lxc.service - LXC Container Initialization and Autoboot Code
   Loaded: loaded (/lib/systemd/system/lxc.service; enabled; vendor preset: enabled)
   Active: active (exited) since Thu 2015-10-01 19:11:26 CEST; 2h 39min ago
 Main PID: 27092 (code=exited, status=0/SUCCESS)

Oct 01 19:11:26 ubuntu systemd[1]: Starting LXC Container Initialization and Autoboot Code...
Oct 01 19:11:26 ubuntu lxc-devsetup[27076]: /dev is devtmpfs
Oct 01 19:11:26 ubuntu systemd[1]: Started LXC Container Initialization and Autoboot Code.
Oct 01 19:11:27 ubuntu systemd[1]: Started LXC Container Initialization and Autoboot Code.
$ sudo service lxc status
● lxc.service - LXC Container Initialization and Autoboot Code
   Loaded: loaded (/lib/systemd/system/lxc.service; enabled; vendor preset: enabled)
   Active: active (exited) since Thu 2015-10-01 19:11:26 CEST; 2h 40min ago
 Main PID: 27092 (code=exited, status=0/SUCCESS)

Oct 01 19:11:26 ubuntu systemd[1]: Starting LXC Container Initialization and Autoboot Code...
Oct 01 19:11:26 ubuntu lxc-devsetup[27076]: /dev is devtmpfs
Oct 01 19:11:26 ubuntu systemd[1]: Started LXC Container Initialization and Autoboot Code.
Oct 01 19:11:27 ubuntu systemd[1]: Started LXC Container Initialization and Autoboot Code.

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Title:
  package lxc 1.1.3-0ubuntu1 failed to install/upgrade: subprocess
  installed post-installation script returned error exit status 100

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