package lightdm 1.16.5-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Joel Costigliola]

I was trying to update terminator using the following commands

    sudo add-apt-repository ppa:gnome-terminator
    sudo apt-get update
    sudo apt-get install terminator

Having said that I'm not sure this directly related.

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: lightdm 1.16.5-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
Date: Mon Nov 23 09:25:00 2015
DuplicateSignature: package:lightdm:1.16.5-0ubuntu1:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2014-06-26 (514 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5
 apt 1.0.10.2ubuntu1
SourcePackage: lightdm
Title: package lightdm 1.16.5-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to wily on 2015-10-28 (25 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.