[Bug 1903574] Re: isenkram-lookup crashed with SIGSEGV in g_type_check_instance_cast()

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** Changed in: gobject-introspection
       Status: Unknown => New

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Title:
  isenkram-lookup crashed with SIGSEGV in g_type_check_instance_cast()

Status in GObject Introspection:
  New
Status in appstream package in Ubuntu:
  Fix Released
Status in gobject-introspection package in Ubuntu:
  Confirmed
Status in isenkram package in Ubuntu:
  Invalid
Status in appstream package in Debian:
  Fix Released

Bug description:
  [Impact]

  An attempt to run the isenkram-lookup command from the isenkram-cli
  package results in a segfault/crash. The proposed appstream upload in
  <https://launchpad.net/~gunnarhj/+archive/ubuntu/appstream> fixes the
  issue.

  [Test case]

  1. Install the isenkram package

  2. Run the isenkram-lookup command

  -> Find that it segfaults

  3. Install the packages built by the appstream source
     package from groovy-proposed

  -> Find that the command succeeds and possibly lists a few
     suggested packages.

  [Where problems could occur]

  TBH this fix is far above my head. Only code comments are changed,
  i.e. some occurrences of "full" are replaced with "container", but it
  still has proved to be it.

  The reasoning in the commit message sounds plausible:

  https://github.com/ximion/appstream/commit/b52858bf

  [Original description]

  I just run the isenkram-lookup command.

  The crash may be related to this autopkgtest failure (which current
  blocks migration of gtk+3.0):

  https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-
  hirsute/hirsute/amd64/i/isenkram/20201108_141822_ee8c4@/log.gz

  This is the script which fails:

  https://salsa.debian.org/debian/isenkram/-/blob/master/debian/tests/test-
  command-line

  and it includes the isenkram-lookup command.

  ProblemType: Crash
  DistroRelease: Ubuntu 21.04
  Package: isenkram-cli 0.44
  ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
  Uname: Linux 5.8.0-25-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu51
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Nov  9 18:07:47 2020
  ExecutablePath: /usr/bin/isenkram-lookup
  ExecutableTimestamp: 1595665183
  InstallationDate: Installed on 2019-11-10 (365 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  InterpreterPath: /usr/bin/python3.8
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/isenkram-lookup
  ProcCwd: /home/gunnar
  Python3Details: /usr/bin/python3.8, Python 3.8.6, python3-minimal, 3.8.6-0ubuntu1
  PythonDetails: N/A
  SegvAnalysis:
   Segfault happened at: 0x7f27ae221cca <g_type_check_instance_cast+26>:	mov    (%rdi),%rax
   PC (0x7f27ae221cca) ok
   source "(%rdi)" (0x6465737500000000) not located in a known VMA region (needed readable region)!
   destination "%rax" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: isenkram
  StacktraceTop:
   g_type_check_instance_cast () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
   as_component_get_provided_for_kind () at /lib/x86_64-linux-gnu/libappstream.so.4
   () at /lib/x86_64-linux-gnu/libffi.so.8
   () at /lib/x86_64-linux-gnu/libffi.so.8
   () at /usr/lib/python3/dist-packages/gi/_gi.cpython-38-x86_64-linux-gnu.so
  Title: isenkram-lookup crashed with SIGSEGV in g_type_check_instance_cast()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lp lpadmin lxd plugdev sambashare sudo
  separator:

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