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[Brian Murray <brian@xxxxxxxxxx>]

** Also affects: unattended-upgrades (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1737635

Title:
  Invalid UTF-8 characters in dpkg's log crash unattended-upgrade.

Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in unattended-upgrades source package in Xenial:
  New

Bug description:
  [Impact]

   * Unattended-upgrades crashes at the end of its run before sending
  out upgrade report email when dpkg's log contains invalid UTF-8
  characters.

  
  [Test Case]

   * Observe
  https://errors.ubuntu.com/problem/4617feba656f6ec216996b0f1f662ae13904b9f8
  not occurring again

  [Regression Potential]

   * The fix is minimal, only replacing invalid characters with �.
  Regressions in u-u are unlikely but tools may break consuming
  unattended-upgrades output in case they can't handle the replacement
  marker.

  [Original Bug Text]

  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 0.98ubuntu1, the problem page at https://errors.ubuntu.com/problem/2fa32547e0d8e7186a0a805e3db6f50317c0dafa contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 1706, in <module>
      main(options)
    File "/usr/bin/unattended-upgrade", line 1619, in main
      log_content = get_dpkg_log_content(logfile_dpkg, install_start_time)
    File "/usr/bin/unattended-upgrade", line 1229, in get_dpkg_log_content
      for line in fp.readlines():
    File "/usr/lib/python3.6/codecs.py", line 321, in decode
      (result, consumed) = self._buffer_decode(data, self.errors, final)
  UnicodeDecodeError: 'utf-8' codec can't decode bytes in position 7912-7913: invalid continuation byte

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