gnome-screensaver crashed with SIGSEGV in XGetScreenSaver()

[Reiner Jung]

Bug reporting was triggered out of the blue while watching a video with vlc.

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: gnome-screensaver 3.6.1-7ubuntu6
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
ApportVersion: 2.20.7-0ubuntu2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 7 12:49:45 2017
ExecutablePath: /usr/bin/gnome-screensaver
GnomeSessionIdleInhibited: Yes
GnomeSessionInhibitors: 1: AppId = vlc, Flags = 8, Reason = Playing some media.
GsettingsGnomeSession:
 org.gnome.desktop.session session-name 'ubuntu'
 org.gnome.desktop.session idle-delay uint32 0
InstallationDate: Installed on 2015-10-16 (721 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcCmdline: /usr/bin/gnome-screensaver --no-daemon
Signal: 11
SourcePackage: gnome-screensaver
StacktraceTop:
 XGetScreenSaver () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 ?? ()
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: gnome-screensaver crashed with SIGSEGV in XGetScreenSaver()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip docker docker-registry lpadmin lxd 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 #1701843, 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.