*** This bug is a duplicate of bug 1674172 ***
    https://bugs.launchpad.net/bugs/1674172

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1674172, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report. Feel free to continue to report any other bugs you may
find.


** This bug has been marked a duplicate of bug 1674172
   gnome-shell crashed with SIGABRT 
[mutter:ERROR:x11/group.c:71:meta_group_new: assertion failed: 
(g_hash_table_lookup (display->groups_by_leader, &group_leader) == NULL)] in 
meta_group_new() from meta_window_compute_group() from 
meta_window_group_leader_changed()

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https://bugs.launchpad.net/bugs/1866286

Title:
  gnome-shell crashed with SIGABRT:
  mutter:ERROR:../src/x11/group.c:75:meta_group_new: assertion failed:
  (g_hash_table_lookup (x11_display->groups_by_leader, &group_leader) ==
  NULL)

Status in gnome-shell package in Ubuntu:
  Confirmed

Bug description:
  I am using the Reaper DAW on Ubuntu 20.04. I was trying to save a
  project when the system froze for a few seconds and then the shell
  refreshed/restarted. This is the resulting bug report.

  ProblemType: Crash
  DistroRelease: Ubuntu 20.04
  Package: gnome-shell 3.35.91-1ubuntu2
  Uname: Linux 5.5.7-050507-generic x86_64
  ApportVersion: 2.20.11-0ubuntu18
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Mar  5 20:30:34 2020
  DisplayManager: gdm3
  ExecutablePath: /usr/bin/gnome-shell
  InstallationDate: Installed on 2020-03-03 (2 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200303)
  ProcCmdline: /usr/bin/gnome-shell
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, user)
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
  RelatedPackageVersions: mutter-common 3.35.91-1ubuntu1
  Signal: 6
  SourcePackage: gnome-shell
  StacktraceTop:
   () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_assertion_message_expr () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
   () at /lib/x86_64-linux-gnu/libmutter-6.so.0
   meta_window_compute_group () at /lib/x86_64-linux-gnu/libmutter-6.so.0
   () at /lib/x86_64-linux-gnu/libmutter-6.so.0
  Title: gnome-shell crashed with SIGABRT
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm audio cdrom dip input kvm libvirt lpadmin lxd plugdev 
sambashare sudo vboxusers
  separator:

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