[Bug 1743196] Re: package update-notifier-common 3.168.5 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Steve Langasek]

The error in your log is:

Processing triggers for update-notifier-common (3.168.5) ...
Traceback (most recent call last):
  File "/usr/lib/update-notifier/package-data-downloader", line 24, in <module>
    import debian.deb822
  File "/usr/lib/python3/dist-packages/debian/deb822.py", line 47, in <module>
    import six
ImportError: No module named 'six'
dpkg: error processing package update-notifier-common (--unpack):
 subprocess installed post-installation script returned error exit status 1

This suggests you have a broken python installation.  Is there a
manually-installed python on your path?

** Changed in: update-notifier (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1743196

Title:
  package update-notifier-common 3.168.5 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 1

Status in update-notifier package in Ubuntu:
  Incomplete

Bug description:
  I don't know what happened it just popped out, so I report

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: update-notifier-common 3.168.5
  ProcVersionSignature: Ubuntu 4.10.0-42.46~16.04.1-generic 4.10.17
  Uname: Linux 4.10.0-42-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  Date: Sun Jan 14 07:02:44 2018
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2017-06-24 (203 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  PackageArchitecture: all
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.2
   apt  1.2.24
  SourcePackage: update-notifier
  Title: package update-notifier-common 3.168.5 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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