*** This bug is a duplicate of bug 1759621 ***

Thank you for taking the time to report this crash and helping to make
this software better.  This particular crash has already been reported
and is a duplicate of bug #1759621, so is being marked as such.  Please
look at the other bug report to see if there is any missing information
that you can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may

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** This bug has been marked a duplicate of bug 1759621
   gnome-shell crashed with SIGSEGV in g_type_check_instance_cast() from 
st_label_set_text() from ffi_call_unix64()

** Information type changed from Private to Public

** Tags removed: need-amd64-retrace

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  gnome-shell crashed with SIGSEGV in g_type_check_instance_cast()

Status in gnome-shell package in Ubuntu:

Bug description:
  After  a restart, and when Chrome was loading up, and asking for my
  Password.  No big deal, as it did not even seem to crash - just the
  error.  Perhaps it was related to the slow startup, which was oddly
  after rebooting into windows for a moment the rebooting back into
  Ubuntu.  Both gave hiccups.  And Ubuntu took an extra 10-20 seconds
  going to a black wallpaper and flashed a few times and did the NVidia
  "Dance" but figured it out.  When X loaded it threw the error as
  stated above.

  Just trying to help, Mark

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: gnome-shell 3.28.0-0ubuntu5
  ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
  Uname: Linux 4.15.0-15-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu5
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Apr 15 20:40:46 2018
  DisplayManager: gdm3
  ExecutablePath: /usr/bin/gnome-shell
  InstallationDate: Installed on 2018-04-12 (3 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180409)
  ProcCmdline: /usr/bin/gnome-shell
   PATH=(custom, no user)
   Segfault happened at: 0x7f964affcd3d <g_type_check_instance_cast+77>:        
movzbl 0x16(%rax),%edx
   PC (0x7f964affcd3d) ok
   source "0x16(%rax)" (0x000093aa) not located in a known VMA region (needed 
readable region)!
   destination "%edx" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: gnome-shell
   g_type_check_instance_cast () at 
   st_label_set_text () at /usr/lib/gnome-shell/libst-1.0.so
   ffi_call_unix64 () at /usr/lib/x86_64-linux-gnu/libffi.so.6
   ffi_call () at /usr/lib/x86_64-linux-gnu/libffi.so.6
   () at /usr/lib/libgjs.so.0
  Title: gnome-shell crashed with SIGSEGV in g_type_check_instance_cast()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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