*** This bug is a duplicate of bug 1759621 ***
    https://bugs.launchpad.net/bugs/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
find.

** Attachment removed: "CoreDump.gz"
   
https://bugs.launchpad.net/bugs/1763527/+attachment/5112987/+files/CoreDump.gz

** Attachment removed: "Disassembly.txt"
   
https://bugs.launchpad.net/bugs/1763527/+attachment/5112989/+files/Disassembly.txt

** Attachment removed: "ProcMaps.txt"
   
https://bugs.launchpad.net/bugs/1763527/+attachment/5112993/+files/ProcMaps.txt

** Attachment removed: "ProcStatus.txt"
   
https://bugs.launchpad.net/bugs/1763527/+attachment/5112994/+files/ProcStatus.txt

** Attachment removed: "Registers.txt"
   
https://bugs.launchpad.net/bugs/1763527/+attachment/5112995/+files/Registers.txt

** Attachment removed: "Stacktrace.txt"
   
https://bugs.launchpad.net/bugs/1763527/+attachment/5112996/+files/Stacktrace.txt

** Attachment removed: "ThreadStacktrace.txt"
   
https://bugs.launchpad.net/bugs/1763527/+attachment/5112997/+files/ThreadStacktrace.txt

** 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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https://bugs.launchpad.net/bugs/1763527

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

Status in gnome-shell package in Ubuntu:
  New

Bug description:
  crash some times after unlock screen

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: gnome-shell 3.28.0-0ubuntu5
  ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
  Uname: Linux 4.15.0-13-generic x86_64
  NonfreeKernelModules: wl nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Apr 12 16:58:37 2018
  DisplayManager: gdm3
  EcryptfsInUse: Yes
  ExecutablePath: /usr/bin/gnome-shell
  InstallationDate: Installed on 2017-10-09 (185 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170926)
  ProcCmdline: /usr/bin/gnome-shell
  ProcEnviron:
   LANGUAGE=es_MX:es
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=es_MX.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7f16b995fd12 <g_type_check_instance_cast+34>:        
mov    (%rdi),%rbp
   PC (0x7f16b995fd12) ok
   source "(%rdi)" (0x80000000) not located in a known VMA region (needed 
readable region)!
   destination "%rbp" ok
  SegvReason: reading unknown 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 bionic on 2018-04-02 (10 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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