package util-linux 2.26.2-6ubuntu3 failed to install/upgrade: unable to install (supposed) new info file '/var/lib/dpkg/tmp.ci/postrm': Is a directory

[Tpaivaa]

tpaivaa@soittila:~$ lsb_release -rd
Description: Ubuntu 16.04.1 LTS
Release: 16.04
tpaivaa@soittila:~$ apt-cache policy util-linux
util-linux:
  Installed: 2.26.2-6ubuntu3
  Candidate: 2.27.1-6ubuntu3.1
  Version table:
     2.27.1-6ubuntu3.1 0
        500 http://fi.archive.ubuntu.com/ubuntu/ xenial-updates/main amd64 Packages
     2.27.1-6ubuntu3 0
        500 http://fi.archive.ubuntu.com/ubuntu/ xenial/main amd64 Packages
 *** 2.26.2-6ubuntu3 0
        100 /var/lib/dpkg/status

I was running :
tpaivaa@soittila:~$ sudo apt-get dist-upgrade

This happened:
Unpacking gcc-5-base:amd64 (5.4.0-6ubuntu1~16.04.1) over (5.2.1-22ubuntu2) ...
Processing triggers for libc-bin (2.23-0ubuntu3) ...
Processing triggers for man-db (2.7.4-1) ...
Errors were encountered while processing:
 /var/cache/apt/archives/libmpfr4_3.1.4-1_amd64.deb
Error in function:

SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/problem_report.py", line 480, in add_to_existing
    self.write(f)
  File "/usr/lib/python3/dist-packages/problem_report.py", line 433, in write
    block = f.read(1048576)
  File "/usr/lib/python3.4/codecs.py", line 319, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte

Original exception was:
SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: util-linux 2.26.2-6ubuntu3
ProcVersionSignature: Ubuntu 4.2.0-36.42-generic 4.2.8-ckt8
Uname: Linux 4.2.0-36-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
Date: Fri Jul 29 09:53:14 2016
DuplicateSignature: package:util-linux:2.26.2-6ubuntu3:unable to install (supposed) new info file '/var/lib/dpkg/tmp.ci/postrm': Is a directory
ErrorMessage: unable to install (supposed) new info file '/var/lib/dpkg/tmp.ci/postrm': Is a directory
InstallationDate: Installed on 2015-06-04 (420 days ago)
InstallationMedia: Ubuntu-Server 15.04 "Vivid Vervet" - Release amd64 (20150422)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.10.2ubuntu2
SourcePackage: util-linux
Title: package util-linux 2.26.2-6ubuntu3 failed to install/upgrade: unable to install (supposed) new info file '/var/lib/dpkg/tmp.ci/postrm': Is a directory
UpgradeStatus: Upgraded to xenial on 2016-07-29 (0 days ago)