This bug was fixed in the package mutter -
3.28.3+git20190124-0ubuntu18.04.2

---------------
mutter (3.28.3+git20190124-0ubuntu18.04.2) bionic; urgency=medium

  * control: Add Breaks on budgie-desktop verions broken by this upload.
    budgie-desktop needs a fix in 10.4+git20171031.10.g9f71bb8-1.2ubuntu1.2
    for compatibility with this mutter.

mutter (3.28.3+git20190124-0ubuntu18.04.1) bionic; urgency=medium

  * New upstream git snapshot based on 3.28.3 plus commits up to 4af8d9d47
    (LP: #1811900)
    - Fix crash in dual monitor setup and gdm activation (LP: #1790525,
      LP: #1795774)
    - Make possible to launch gnome-shell in wayland using nvidia and EGLDevice
      backend (LP: #1805444)
  * debian/libmutter-2-0.symbols: Add new symbols
  * d/p/gpu-kms-Don-t-crash-if-drmModeGetResources-returns-N.patch,
    d/p/native-gpu-Handle-drmModeSetCrtc-failing-gracefully.patch,
    d/p/monitor-manager-Filter-out-low-screen-resolutions.patch,
    d/p/window-wayland-Always-update-monitor-for-non-user-ops.patch,
    d/p/window-Don-t-refuse-to-move-focus-to-the-grab-window.patch,
    d/p/window-Explicitly-exclude-unmanaging-window-from-focus-ag.patch,
    d/p/monitor-Use-current-monitor-mode-to-check-whether-active.patch,
    d/p/core-Return-1-if-meta_window_get_monitor-is-called-on-an-.patch,
    d/p/renderer-native-Fallback-to-non-planar-API-if-gbm_bo_get_.patch,
    d/p/clutter-x11-Implement-keycode-lookup-from-keysyms-on-virt.patch,
    d/p/clutter-Do-not-latch-modifiers-on-modifier-keys.patch:
    - Removed as applied upstream
  * d/p/clutter-Fix-offscreen-effect-painting-of-clones.patch:
    - Fix offscreen-effect painting of clones in zoom mode (LP: #1767648,
      LP: #1779615)

 -- Iain Lane <[email protected]>  Wed, 17 Apr 2019 11:35:51 +0100

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

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to mutter in Ubuntu.
https://bugs.launchpad.net/bugs/1795774

Title:
  gnome-shell crashed with SIGSEGV in
  cogl_texture_get_height(texture=0x0) from
  clutter_offscreen_effect_real_paint_target() from
  clutter_offscreen_effect_paint_texture() from
  clutter_offscreen_effect_paint() from clutter_actor_continue_paint()

Status in mutter package in Ubuntu:
  Fix Released
Status in mutter source package in Bionic:
  Fix Released
Status in mutter source package in Cosmic:
  Fix Released

Bug description:
  [ Impact ]

  Gnome shell crashes on cogl_texture_get_height

  [ Test case ]

  No clear reproducer is know for such issue, crashes should be
  monitored in e.u.c checking that this is not happening anymore for the
  version in proposed.

  [ Regression potential ]

  Low, the proposed fix is part of the current stable branch upstream
  and not changed in further revisions.

  --

  The Ubuntu Error Tracker has been receiving reports about a problem regarding 
gnome-shell.  This problem was most recently seen with package version 
3.30.0-1ubuntu2, the problem page at 
https://errors.ubuntu.com/problem/e5b2dcb04552882a76f1daa6b9f18ba864269d26 
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:
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1795774/+subscriptions

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