*** 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.

** Attachment removed: "CoreDump.gz"
   
https://bugs.launchpad.net/bugs/1726295/+attachment/4987414/+files/CoreDump.gz

** Attachment removed: "Disassembly.txt"
   
https://bugs.launchpad.net/bugs/1726295/+attachment/4987416/+files/Disassembly.txt

** Attachment removed: "ProcMaps.txt"
   
https://bugs.launchpad.net/bugs/1726295/+attachment/4987419/+files/ProcMaps.txt

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https://bugs.launchpad.net/bugs/1726295/+attachment/4987420/+files/ProcStatus.txt

** Attachment removed: "Registers.txt"
   
https://bugs.launchpad.net/bugs/1726295/+attachment/4987421/+files/Registers.txt

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https://bugs.launchpad.net/bugs/1726295/+attachment/4987422/+files/Stacktrace.txt

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https://bugs.launchpad.net/bugs/1726295/+attachment/4987423/+files/ThreadStacktrace.txt

** 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() from ffi_call_unix64() [dash-to-panel specific?]

** Information type changed from Private to Public

** Tags removed: need-amd64-retrace

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https://bugs.launchpad.net/bugs/1726295

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

Status in gnome-shell package in Ubuntu:
  New

Bug description:
  # lsb_release -rd
  Description:  Ubuntu 17.10
  Release:      17.10

  # apt-cache policy gnome-shell
  gnome-shell:
    Installed: 3.26.1-0ubuntu4
    Candidate: 3.26.1-0ubuntu4
    Version table:
   *** 3.26.1-0ubuntu4 500
          500 http://dk.archive.ubuntu.com/ubuntu artful/main amd64 Packages
          100 /var/lib/dpkg/status

  This happens 2-3 times per day it seems. Sometimes when working the
  whole systems seems to become unresponsive. My cursor can still be
  moved. But everything else is frozen (unresponsive). After 30 secs the
  problems seems to be resolved. And maybe a minute after that i get the
  prompt to report this problem.

  Let me know if you need more info

  ProblemType: Crash
  DistroRelease: Ubuntu 17.10
  Package: gnome-shell 3.26.1-0ubuntu4
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: GNOME
  Date: Mon Oct 23 10:07:07 2017
  DisplayManager: gdm3
  ExecutablePath: /usr/bin/gnome-shell
  GsettingsChanges:
   b'org.gnome.shell' b'enabled-extensions' 
b"['[email protected]', 
'[email protected]', 
'[email protected]', '[email protected][email protected]', 
'[email protected]', 
'[email protected]']"
   b'org.gnome.shell' b'favorite-apps' b"['google-chrome.desktop']"
   b'org.gnome.desktop.interface' b'enable-animations' b'false'
   b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
   b'org.gnome.desktop.interface' b'gtk-theme' b"'Arc-Darker'"
  InstallationDate: Installed on 2017-10-12 (10 days ago)
  InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412)
  ProcCmdline: /usr/bin/gnome-shell
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/usr/bin/zsh
  SegvAnalysis:
   Segfault happened at: 0x7fd58b7b4e0d <g_type_check_instance_cast+77>:        
movzbl 0x16(%rax),%edx
   PC (0x7fd58b7b4e0d) ok
   source "0x16(%rax)" (0x100000016) not located in a known VMA region (needed 
readable region)!
   destination "%edx" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: gnome-shell
  StacktraceTop:
   g_type_check_instance_cast () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   st_label_set_text () from /usr/lib/gnome-shell/libst-1.0.so
   ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
   ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
   ?? () from /usr/lib/libgjs.so.0
  Title: gnome-shell crashed with SIGSEGV in g_type_check_instance_cast()
  UpgradeStatus: Upgraded to artful on 2017-10-19 (3 days ago)
  UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo

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