Same problem here, happens once in a while (several times a day), it restarts 
the window manager:
--------------------------------------------------------------------------------------
Dec 17 00:51:33 server kernel: [312304.994059] gnome-shell[25564]: segfault at 
7f1eac1fffe8 ip 00007f1f397b43d5 sp 00007ffc5d9fb600 error 4 in 
libgjs.so.0.0.0[7f1f3978c000+ba000
]
Dec 17 00:51:33 server gnome-session[4492]: gnome-session-binary[4492]: 
WARNING: Application 'org.gnome.Shell.desktop' killed by signal 11
Dec 17 00:51:33 server gnome-session-binary[4492]: WARNING: Application 
'org.gnome.Shell.desktop' killed by signal 11
Dec 17 00:51:33 server /usr/lib/gdm3/gdm-x-session[4479]: (--) NVIDIA(GPU-0): 
DFP-0: disconnected
Dec 17 00:51:33 server /usr/lib/gdm3/gdm-x-session[4479]: (--) NVIDIA(GPU-0): 
DFP-0: Internal TMDS
Dec 17 00:51:33 server /usr/lib/gdm3/gdm-x-session[4479]: (--) NVIDIA(GPU-0): 
DFP-0: 330.0 MHz maximum pixel clock
Dec 17 00:51:33 server /usr/lib/gdm3/gdm-x-session[4479]: (--) NVIDIA(GPU-0):
--------------------------------------------------------------------------------------

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1689863

Title:
  gnome-shell crashed with SIGSEGV in
  js::GCMethods<JSObject*>::needsPostBarrier()

Status in gnome-shell package in Ubuntu:
  Confirmed

Bug description:
  https://errors.ubuntu.com/problem/858749eabf2fe619e12002e9f13cb2586b61d781
  and
  https://errors.ubuntu.com/problem/d281488b75322ce41fbfbb73416a6730da093b40

  ---

  Kodi and Chrome was running. It happened when I was looking at a video
  played by Kodi. I didn't use keyboard or mouse.

  ProblemType: Crash
  DistroRelease: Ubuntu 17.10
  Package: gnome-shell 3.24.1-0ubuntu3
  ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
  Uname: Linux 4.10.0-20-generic x86_64
  ApportVersion: 2.20.4-0ubuntu6
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: GNOME
  Date: Wed May 10 18:20:24 2017
  DisplayManager: lightdm
  ExecutablePath: /usr/bin/gnome-shell
  ExecutableTimestamp: 1493296359
  InstallationDate: Installed on 2017-04-29 (11 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170428)
  ProcCmdline: /usr/bin/gnome-shell
  ProcCwd: /home/p-i
  SegvAnalysis:
   Segfault happened at: 0x7f164beeb105:        testb  $0x1,(%rax)
   PC (0x7f164beeb105) ok
   source "$0x1" ok
   destination "(%rax)" (0x7f15e3cfffe8) not located in a known VMA region 
(needed writable region)!
  SegvReason: writing unknown VMA
  Signal: 11
  SourcePackage: gnome-shell
  StacktraceTop:
   ?? () from /usr/lib/libgjs.so.0
   g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
   meta_run () from /usr/lib/x86_64-linux-gnu/libmutter-0.so.0
  Title: gnome-shell crashed with SIGSEGV in g_main_context_dispatch()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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