package libreoffice-base-core 1:5.1.2-0ubuntu1 failed to install/upgrade: dependency problems - leaving unconfigured

[Robin]

after upgrade from 14.04 to 16.04

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: libreoffice-base-core 1:5.1.2-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic i686
ApportVersion: 2.20.1-0ubuntu2
Architecture: i386
Date: Sun Apr 24 15:13:35 2016
ErrorMessage: dependency problems - leaving unconfigured
InstallationDate: Installed on 2016-04-23 (1 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140722.2)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1
 apt 1.2.10ubuntu1
SourcePackage: libreoffice
Title: package libreoffice-base-core 1:5.1.2-0ubuntu1 failed to install/upgrade: dependency problems - leaving unconfigured
UpgradeStatus: Upgraded to xenial on 2016-04-24 (0 days ago)

[Björn Michaelsen (bjoern-michaelsen)]

> File "/usr/share/apport/general-hooks/ubuntu.py", line 468, in <listcomp>
> report['DpkgTerminalLog'] = '\n'.join([str(line.encode('utf-8')) for line in lines])
> AttributeError: 'bytes' object has no attribute 'encode'

Looks like apport tries to run Python3 code in Python2?