package fontconfig 2.11.1-0ubuntu7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

this is while installing from ubuntu desktop after upgrading to 16.04

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: fontconfig 2.11.1-0ubuntu7
ProcVersionSignature: Ubuntu 4.4.0-4.19-generic 4.4.1
Uname: Linux 4.4.0-4-generic x86_64
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
Date: Sun Feb 14 09:42:13 2016
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2014-12-17 (425 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.1.10
SourcePackage: fontconfig
Title: package fontconfig 2.11.1-0ubuntu7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to xenial on 2016-02-14 (2 days ago)