gnome-shell crashed with SIGSEGV in g_type_check_instance_cast()

[Nicolai Kobber]

# 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 address hidden>', '<email address hidden>', '<email address hidden>', '<email address hidden>@gmail.com', '<email address hidden>', '<email address hidden>']"
 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

[Apport retracing service (apport)]

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.