*** This bug is a duplicate of bug 1714989 ***
    https://bugs.launchpad.net/bugs/1714989

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 #1714989, 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
find.

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https://bugs.launchpad.net/bugs/1715392/+attachment/4945345/+files/Disassembly.txt

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https://bugs.launchpad.net/bugs/1715392/+attachment/4945350/+files/ProcMaps.txt

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https://bugs.launchpad.net/bugs/1715392/+attachment/4945351/+files/ProcStatus.txt

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** This bug has been marked a duplicate of bug 1714989
   gnome-shell crashed with SIGSEGV in g_type_check_instance_cast() from 
st_label_set_text()

** Information type changed from Private to Public

** Tags removed: need-amd64-retrace

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https://bugs.launchpad.net/bugs/1715392

Title:
  gnome-shell crashed with SIGSEGV in g_type_check_instance_cast()

Status in gnome-shell package in Ubuntu:
  New

Bug description:
  Since ~2 days ago, gnome-shell on Artful keeps crashing maybe once an
  hour.

  ProblemType: Crash
  DistroRelease: Ubuntu 17.10
  Package: gnome-shell 3.25.91-0ubuntu3
  ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8
  Uname: Linux 4.12.0-12-generic x86_64
  ApportVersion: 2.20.7-0ubuntu1
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Wed Sep  6 15:01:11 2017
  DisplayManager: gdm3
  ExecutablePath: /usr/bin/gnome-shell
  InstallationDate: Installed on 2017-05-25 (103 days ago)
  InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412)
  ProcCmdline: /usr/bin/gnome-shell
  SegvAnalysis:
   Segfault happened at: 0x7f3f96e39e5d <g_type_check_instance_cast+77>:        
movzbl 0x16(%rax),%edx
   PC (0x7f3f96e39e5d) ok
   source "0x16(%rax)" (0x0000b3ca) not located in a known VMA region (needed 
readable region)!
   destination "%edx" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: gnome-shell
  StacktraceTop:
   g_type_check_instance_cast () at 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   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: Upgraded to artful on 2017-06-10 (88 days ago)
  UserGroups: adm cdrom dip libvirt lpadmin plugdev sambashare sudo

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