This bug was fixed in the package mutter - 3.32.1-2ubuntu1~19.04.1

---------------
mutter (3.32.1-2ubuntu1~19.04.1) disco; urgency=medium

  * Backport from eoan to disco
  * Update VCS metadata

mutter (3.32.1-2ubuntu1) eoan; urgency=medium

  * Merge with debian
    - Update to 3.32.1 upstream version (LP: #1826936)
    - Fix applications aren't focused in Wayland session (LP: #1826176)
    - Fix crash on hotplugging a dock with a monitor (LP: #1826182)
    Remaining changes:
    + debian/control:
      - Update VCS flags to point to launchpad
      - Update maintainer to ubuntu
    + debian/gbp.conf: update branch to point to ubuntu/master
    + debian/patches/x11-Add-support-for-fractional-scaling-using-Randr.patch:
      - X11: Add support for fractional scaling using Randr
  * d/p/x11-Add-support-for-fractional-scaling-using-Randr.patch:
    - Fixed crash on calculation of global scale (LP: #1826933)

mutter (3.32.1-2) experimental; urgency=medium

  * Cherry-pick patches from upstream gnome-3-32 branch:
    - compositor-Destroy-window-actors-list-on-destruction.patch,
      compositor-Disconnect-from-stage-signals-on-destruction.patch: Fix crash
      when exiting. (LP: #1813716)
    - 0-initialize a struct we'll be memcmp()ing.
  * Reorder patch series so upstream patches come first (no conflicts, no
    refreshing required).

mutter (3.32.1-1) experimental; urgency=medium

  * New upstream release
  * debian/patches: disable mousekeys with Numlock ON to match the
    documentation (cherry picked from the 3.32 branch)

mutter (3.32.0+git20190410-2) experimental; urgency=medium

  [ Gunnar Hjalmarsson ]
  * Add gnome-control-center-data to Build-Depends. This package provides
    gnome-keybindings.{its,loc}. These are needed if the translation template
    is regenerated at build-time to translate the key bindings defined in
    data/50-*.xml. (LP: #1823722)

 -- Iain Lane <iain.l...@canonical.com>  Wed, 01 May 2019 11:32:50 +0100

** Changed in: mutter (Ubuntu Disco)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1813716

Title:
  gnome-shell crashed with SIGSEGV in meta_x11_display_get_xdisplay →
  detach_pixmap → meta_surface_actor_x11_dispose → g_object_unref →
  ObjectInstance → → release_native_object

Status in Mutter:
  Fix Released
Status in gnome-shell package in Ubuntu:
  Fix Released
Status in mutter package in Ubuntu:
  Fix Released
Status in gnome-shell source package in Disco:
  Fix Committed
Status in mutter source package in Disco:
  Fix Released
Status in gnome-shell source package in Eoan:
  Fix Released
Status in mutter source package in Eoan:
  Fix Released

Bug description:
  [ Impact ]

  GNOME Shell crashes on restart or when ending the session

  [ Test Case ]

  Under X11, try to reload the shell multiple times using
   - Alt+F2: write 'r', press 'enter'.
   - Or quit it writing in the run dialog 'debugexit'.

  Repeat multiple times, no crash caused by x11 calls should happen.

  [ Regression potential ]

  Nothing known, window actors might not be painted on reload.

  ---

  
  Tracked upstream in https://gitlab.gnome.org/GNOME/mutter/issues/576

  Proposed fix: https://gitlab.gnome.org/GNOME/mutter/merge_requests/557

  The Ubuntu Error Tracker has been receiving reports about a problem regarding 
gnome-shell.  This problem was most recently seen with package version 
3.30.2-2ubuntu1, the problem page at 
https://errors.ubuntu.com/problem/a27089759201dfe884a9070c2d62c50680fb2de4 
contains more details, including versions of packages affected, stacktrace or 
traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker and are a software 
developer, you can request it at http://forms.canonical.com/reports/.

To manage notifications about this bug go to:
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