[Bug 1737635] [NEW] Invalid UTF-8 characters in dpkg's log crash unattended-upgrade.

[errors.ubuntu.com bug bridge]

Public bug reported:

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

** Affects: unattended-upgrades (Ubuntu)
     Importance: Undecided
         Status: In Progress


** Tags: artful

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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:
  In Progress

Bug description:
  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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