[Bug 1766337] Re: uncaught python exception : UnicodeDecodeError: 'utf-8' codec can't decode byte; invalid continuation byte

[Łukasz Zemczak]

Hello Laurent, or anyone else affected,

Accepted apport into bionic-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/apport/2.20.9-0ubuntu7.6 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-bionic to verification-done-bionic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-bionic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: apport (Ubuntu Bionic)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-bionic

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https://bugs.launchpad.net/bugs/1766337

Title:
  uncaught python exception : UnicodeDecodeError: 'utf-8' codec can't
  decode byte; invalid continuation byte

Status in apport package in Ubuntu:
  Fix Released
Status in apport source package in Bionic:
  Fix Committed

Bug description:
  [Impact]
  Ubuntu crash reports and package installation failures may not include DpkgTerminalLog.txt if there is a UnicodeDecodeError trying to read the dpkg log file.

  [Test Case]
  Because the fix is simple and its complicated to have a dpkg log file with unicode in it we'll just test that truncating of a dpkg log file still works.

  1) Install 2vcard (so we have a recent dpkg log entry)
  2) Run update-manager
  3) Kill it with signal 11 e.g. kill -11 $PID of update-manager
  4) Run ubuntu-bug /var/crash/_usr_bin_update-manager.1000.crash
  5) Observe DpkgTerminalLog.txt only contains a log entry regarding the installation of 2vcard and matches the content in /var/log/apt/term.log.

  [Regression Potential]
  Its possible that the code to replace the DpkgTerminalLog contents of the report is wrong but the test case above ensures that it isn't.

  [Original Description]
  Hi,

  here is a python exception I got while reporting a bug:

  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/apport/report.py", line 198, in _run_hook
      symb['add_info'](report, ui)
    File "/usr/share/apport/general-hooks/ubuntu.py", line 89, in add_info
      check_attachment_for_errors(report, attachment)
    File "/usr/share/apport/general-hooks/ubuntu.py", line 208, in check_attachment_for_errors
      trim_dpkg_log(report)
    File "/usr/share/apport/general-hooks/ubuntu.py", line 508, in trim_dpkg_log
      report['DpkgTerminalLog'] = '\n'.join([str(line.decode('utf-8')) for line in lines])
    File "/usr/share/apport/general-hooks/ubuntu.py", line 508, in <listcomp>
      report['DpkgTerminalLog'] = '\n'.join([str(line.decode('utf-8')) for line in lines])
  UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe2 in position 3070: invalid continuation byte

  It can also be seen here:

    https://launchpadlibrarian.net/367002573/HookError_ubuntu.txt

  ProblemType: BugDistroRelease: Ubuntu 18.04
  Package: apport 2.20.9-0ubuntu6
  Uname: Linux 4.16.3-041603-generic x86_64
  ApportLog:

  ApportVersion: 2.20.9-0ubuntu6
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Mon Apr 23 20:13:24 2018
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bashSourcePackage: apport
  UpgradeStatus: No upgrade log present (probably fresh install)

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