[Bug 1889443] Re: "ValueError: ['separator'] has no binary content" when running `apport-unpack /var/crash/...`

Brian Murray 1889443 at bugs.launchpad.net
Tue Dec 6 21:26:19 UTC 2022


The previous SRU of apport for Focal has had the phasing of its update
stop due to potential regressions. It would be good to get those
addressed before accepting a new version of apport on top of that.

** Changed in: apport (Ubuntu Focal)
       Status: Triaged => Incomplete

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Title:
  "ValueError: ['separator'] has no binary content" when running
  `apport-unpack /var/crash/...`

Status in Apport:
  Fix Released
Status in apport package in Ubuntu:
  Fix Released
Status in apport source package in Bionic:
  Triaged
Status in apport source package in Focal:
  Incomplete
Status in apport source package in Jammy:
  Fix Committed

Bug description:
  [ Impact ]

  Extracting a crash file will always fail in case the crash report was
  processed.

  [ Test plan ]

  1. Create crash (e.g. with divide-by-zero):
  ```
  sudo apt install chaos-marmosets
  divide-by-zero
  ```
  2. Click on "show details" in Apport crash UI, then close it
  3. exract crash report:
  ```
  tmpdir=$(mktemp -d)
  apport-unpack /var/crash/_usr_bin_divide-by-zero.1000.crash "$tmpdir"
  rm -rf "$tmpdir"
  ```

  The extraction should work and not print a stack trace.

  [ Where problems could occur ]

  The change touches the problem report reading code which is used in
  several places. This could cause regressions in reading the problem
  report.

  [ Original report ]

  The crash file I'm using is as-produced by the system (on groovy), and
  appears to have an empty value for separator:

  $ grep separator /var/crash/_usr_bin_neomutt.1000.crash
  separator:

  Traceback (most recent call last):
    File "/usr/bin/apport-unpack", line 77, in <module>
      pr.extract_keys(f, bin_keys, dir)
    File "/usr/lib/python3/dist-packages/problem_report.py", line 269, in extract_keys
      raise ValueError('%s has no binary content' %
  ValueError: ['separator'] has no binary content

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: apport 2.20.11-0ubuntu42
  ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
  Uname: Linux 5.4.0-37-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu42
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashReports:
   640:1000:117:1620030:2020-07-29 12:16:57.045274496 -0400:2020-07-29 12:19:15.559243636 -0400:/var/crash/_usr_bin_neomutt.1000.crash
   640:1000:117:4399480:2020-07-23 10:30:21.433552906 -0400:2020-07-23 10:30:18.921508067 -0400:/var/crash/_usr_bin_pavucontrol.1000.crash
   640:1000:117:29909:2020-07-29 12:19:15.603244279 -0400:2020-07-29 12:19:15.603244279 -0400:/var/crash/_usr_bin_apport-unpack.1000.crash
  CurrentDesktop: i3
  Date: Wed Jul 29 12:22:54 2020
  InstallationDate: Installed on 2019-05-07 (448 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  PackageArchitecture: all
  SourcePackage: apport
  UpgradeStatus: Upgraded to groovy on 2020-06-22 (37 days ago)

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