workrave crashed with SIGSEGV in XQueryExtension(). Just Activated shell extension

[Jose]

just "switched on" workrave extension via software center -> plug-ins -> shell extensions -> configure shell extensions.

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: workrave 1.10.16-2ubuntu1
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: Thu Oct 19 11:52:28 2017
ExecutablePath: /usr/bin/workrave
ProcCmdline: /usr/bin/workrave
Signal: 11
SourcePackage: workrave
StacktraceTop:
 XQueryExtension () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 XInitExtension () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 XextAddDisplay () from /usr/lib/x86_64-linux-gnu/libXext.so.6
 XScreenSaverQueryExtension () from /usr/lib/x86_64-linux-gnu/libXss.so.1
 XScreenSaverMonitor::init() ()
Title: workrave crashed with SIGSEGV in XQueryExtension()
UpgradeStatus: Upgraded to artful on 2017-10-19 (0 days ago)
UserGroups: adm cdrom dip 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 #1723153, 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.