Problem reproduced with old version:

gert@gert-laptop:~$ dpkg -s libmutter-2-0 | grep Version
Version: 3.28.3-2~ubuntu18.04.2

 Apr 19 14:41:11 gert-laptop gnome-shell[991]: CoglError set over the top of a 
previous CoglError or uninitialized memory.
                                               This indicates a bug in 
someone's code. You must ensure an error is NULL before it's set.
                                               The overwriting error message 
was: Sliced texture size of 2560 x 1024 not possible with max waste set to -1
 Apr 19 14:41:11 gert-laptop org.gnome.Shell.desktop[991]: double free or 
corruption (fasttop)
 Apr 19 14:41:11 gert-laptop org.gnome.Shell.desktop[991]: == Stack trace for 
context 0x1ab5838 ==
 Apr 19 14:41:47 gert-laptop org.gnome.Shell.desktop[991]: (EE)
 Apr 19 14:41:47 gert-laptop org.gnome.Shell.desktop[991]: Fatal server error:
 Apr 19 14:41:47 gert-laptop org.gnome.Shell.desktop[991]: (EE) failed to read 
Wayland events: Broken pipe
 Apr 19 14:41:47 gert-laptop org.gnome.Shell.desktop[991]: (EE)
 Apr 19 14:41:47 gert-laptop gnome-session-binary[983]: WARNING: Application 
'org.gnome.Shell.desktop' killed by signal 6

After installation from proposed, the problem was solved:

root@gert-laptop:/etc/apt# dpkg -s libmutter-2-0 | grep Version
Version: 3.28.3+git20190124-0ubuntu18.04.2

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https://bugs.launchpad.net/bugs/1790525

Title:
  gnome-shell assert failure: double free or corruption (fasttop) in
  g_free() from g_error_free() from cogl_error_free() from
  cogl_texture_new_with_size() from
  clutter_offscreen_effect_real_create_texture()

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