[Bug 1779055] Re: package update-notifier-common 3.168.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Steve Langasek]

The error in the log is:

Processing triggers for update-notifier-common (3.168.8) ...
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 38, in <module>
    import chardet
ImportError: No module named 'chardet'
dpkg: error processing package update-notifier-common (--unpack):
 subprocess installed post-installation script returned error exit status 1

Why is the chardet module missing from your python path?  The package
dependencies guarantee that it will be present on the path of the system
python.

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

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https://bugs.launchpad.net/bugs/1779055

Title:
  package update-notifier-common 3.168.8 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 but this is coming in regularly mostly when I am
  updating the libraries or installing something new or restarting the
  system.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: update-notifier-common 3.168.8
  ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
  Uname: Linux 4.8.0-36-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  Date: Thu Jun 28 11:10:38 2018
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2018-02-28 (120 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  PackageArchitecture: all
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.4
   apt  1.2.26
  SourcePackage: update-notifier
  Title: package update-notifier-common 3.168.8 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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