[Bug 1427600] Re: apport-unpack: ValueError: ['UserGroups'] has no binary content

[Nicholas Schell]

If apport-unpack expects a value and cannot have an empty field for
UserGroups, that would mean the bug is in report.py. The thing that is
generating the totally broken crash report.

report.py will leave the UserGroups field empty if the user is not part
of any system groups (GIDs less thans 1000). Also report.py ignores the
user's primary group if that is the only system group they are a part
of.

It's surprising this has been this way for literally years, since 12.04
at least. I really don't understand why. Especially since most system
users are only a part of one group, their own primary group. AND when
you run apport-unpack on a crash report with an empty UserGroups field
will generate a new crash report for apport-unpack. Like seriously...

P.S. this problem is going to be present in 20.04. So likely unchanged
for another 2 years.

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Title:
  apport-unpack: ValueError: ['UserGroups'] has no binary content

Status in apport package in Ubuntu:
  Triaged
Status in apport source package in Xenial:
  Triaged

Bug description:
  When running apport-unpack to get at a core dump

  laney at raleigh> sudo apport-unpack _usr_lib_x86_64-linux-gnu_urfkill_urfkilld.0.crash ~/temp/zozoz
  [sudo] password for laney: 
  Traceback (most recent call last):
    File "/usr/bin/apport-unpack", line 73, in <module>
      pr.extract_keys(f, bin_keys, dir)
    File "/usr/lib/python3/dist-packages/problem_report.py", line 253, in extract_keys
      [item for item, element in b64_block.items() if element is False])
  ValueError: ['UserGroups'] has no binary content
  laney at raleigh> apport-cli --version
  2.16.2

  It's not terrible, because most files are unpacked (those which sort
  before UserGroups, I guess).

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: apport 2.16.2-0ubuntu1
  ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0
  Uname: Linux 3.19.0-7-generic x86_64
  ApportLog:
   
  ApportVersion: 2.16.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Mar  3 10:09:26 2015
  InstallationDate: Installed on 2012-10-07 (876 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64 (20121007)
  PackageArchitecture: all
  SourcePackage: apport
  UpgradeStatus: Upgraded to vivid on 2013-05-07 (665 days ago)

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