Public bug reported:

Crash when changing docking or monitor settings.  I have 3 identical
monitors and I am trying to order them properly (horizontally).

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: gnome-control-center 1:3.26.1-0ubuntu4
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
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 27 19:38:18 2017
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2017-10-27 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
ProcCmdline: gnome-control-center --overview
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fce64b5bde2 <g_type_check_instance_cast+34>:  mov    
(%rdi),%rbp
 PC (0x7fce64b5bde2) ok
 source "(%rdi)" (0x6000e2c49100080) not located in a known VMA region (needed 
readable region)!
 destination "%rbp" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gnome-control-center
StacktraceTop:
 g_type_check_instance_cast () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? ()
 g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gnome-control-center 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

** Affects: gnome-control-center (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-crash artful need-amd64-retrace wayland-session

** Information type changed from Private to Public

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https://bugs.launchpad.net/bugs/1728172

Title:
  gnome-control-center crashed with SIGSEGV in
  g_type_check_instance_cast()

Status in gnome-control-center package in Ubuntu:
  New

Bug description:
  Crash when changing docking or monitor settings.  I have 3 identical
  monitors and I am trying to order them properly (horizontally).

  ProblemType: Crash
  DistroRelease: Ubuntu 17.10
  Package: gnome-control-center 1:3.26.1-0ubuntu4
  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
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Oct 27 19:38:18 2017
  ExecutablePath: /usr/bin/gnome-control-center
  InstallationDate: Installed on 2017-10-27 (0 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
  ProcCmdline: gnome-control-center --overview
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7fce64b5bde2 <g_type_check_instance_cast+34>:        
mov    (%rdi),%rbp
   PC (0x7fce64b5bde2) ok
   source "(%rdi)" (0x6000e2c49100080) not located in a known VMA region 
(needed readable region)!
   destination "%rbp" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: gnome-control-center
  StacktraceTop:
   g_type_check_instance_cast () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   ?? ()
   g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
  Title: gnome-control-center 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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