Bug#955482: mutter aborts with "clutter-offscreen-effect.c:261:clutter_offscreen_effect_pre_paint: code should not be reached"

[Víctor M. Jáquez L.]

Package: mutter
Version: 3.34.4-1
Severity: important

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
	
     I was using gnome-shell, on wayland, with a terminal, emacs and epiphany (playing a youtube video). Out of the blue, the session broke and got the gdm login screen.

     I checked the journal and found this

Mar 31 15:33:10 miau gnome-shell[1503]: Clutter:ERROR:../clutter/clutter/clutter-offscreen-effect.c:261:clutter_offscreen_effect_pre_paint: code should not be reached
Mar 31 15:33:10 miau gnome-shell[1503]: Bail out! Clutter:ERROR:../clutter/clutter/clutter-offscreen-effect.c:261:clutter_offscreen_effect_pre_paint: code should not be reached
Mar 31 15:33:10 miau gnome-shell[1503]: == Stack trace for context 0x5627fc97c330 ==
Mar 31 15:33:10 miau systemd[1]: Created slice system-systemd\x2dcoredump.slice.
Mar 31 15:33:10 miau systemd[1]: Started Process Core Dump (PID 21845/UID 0).

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

     I looked for error in mutter's gitlab and found this report which is similar:

	https://gitlab.gnome.org/GNOME/mutter/-/issues/808

     And this merge request that fixes it

	https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1147

     I rebuild the mutter package with this patch,  which applied without problems, and now I'm running it. It seems to solve the problem.

   * What was the outcome of this action?
   * What outcome did you expect instead?

	I guess, for debian testing I would either add this patch in the build, or upgrade to 1.36.


Thanks :)

vmjl

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-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (900, 'testing'), (800, 'unstable'), (500, 'testing-debug'), (500, 'stable'), (102, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 5.4.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages mutter depends on:
ii  gnome-settings-daemon-common  3.36.0-1
ii  gsettings-desktop-schemas     3.36.0-1
ii  libc6                         2.30-2
ii  libgles2                      1.3.1-1
ii  libglib2.0-0                  2.64.1-1
ii  libmutter-5-0                 3.34.4-1
ii  libwayland-server0            1.18.0-1
ii  libx11-6                      2:1.6.9-2
ii  libxcomposite1                1:0.4.4-2
ii  mutter-common                 3.34.4-1
ii  zenity                        3.32.0-5

mutter recommends no packages.

Versions of packages mutter suggests:
ii  gnome-control-center  1:3.36.0-1
ii  xdg-user-dirs         0.17-2

-- no debconf information