Created attachment 353649 [details]
Full syslog around event.

A random segfault crashed my gnome session and logged me out while I left my system on overnight.  There was no user activity at this time, though the nice round time makes me think a scheduled task was involved.

System:
  Arch Linux amd64 (Fully updated as of Jun 12, 2017).
  i7-7700K, GTX1070 (Nvidia drivers, but using primus with i915. Display is connected to integrated graphics port)
  GNOME Shell 3.24.2 (Wayland)
  gjs 1.48.3

Relevant packages:
  gjs 1.48.3-1
  gnome-desktop 1:3.24.2-1
  gnome-session 3.24.1-1
  gnome-shell 3.24.2-1
  wayland 1.13.0-1
  wayland-protocols 1.7-1
  xorg-server 1.19.3-2
  xorg-server-common 1.19.3-2
  xorg-server-xwayland 1.19.3-2


Full syslog around the crash is attached.  I also have a core dump, which I have not uploaded as I'm unsure of what sensitive information may be contained within.  I can share the file directly with gnome developers if needed.

Dump of relevant thread is:

Jun 12 05:00:01 rdlp2 systemd-coredump[18942]: Process 3142 (gnome-shell) of user 1000 dumped core.
                                               
                                               Stack trace of thread 3142:
                                               #0  0x00007f366ca2bed5 n/a (libgjs.so.0)
                                               #1  0x00007f366ab468b5 g_main_context_dispatch (libglib-2.0.so.0)
                                               #2  0x00007f366ab46c78 n/a (libglib-2.0.so.0)
                                               #3  0x00007f366ab46f92 g_main_loop_run (libglib-2.0.so.0)
                                               #4  0x00007f366c309fdc meta_run (libmutter-0.so.0)
                                               #5  0x0000000000401ff7 main (gnome-shell)
                                               #6  0x00007f366a55943a __libc_start_main (libc.so.6)
                                               #7  0x000000000040212a n/a (gnome-shell)
                                               
                                               Stack trace of thread 3143:
                                               #0  0x00007f366a61c2bd poll (libc.so.6)
                                               #1  0x00007f366ab46bf9 n/a (libglib-2.0.so.0)
                                               #2  0x00007f366ab46d0c g_main_context_iteration (libglib-2.0.so.0)

[...]
Jun 12 05:00:01 rdlp2 kernel: gnome-shell[3142]: segfault at 7f35d94fffe8 ip 00007f366ca2bed5 sp 00007ffde566f800 error 4 in libgjs.so.0.0.0[7f366ca01000+bc000]