qtcreator crashed with SIGABRT in QMessageLogger::fatal()

[Gerhard Gonter]

startet qtcreator from the commandline (tcsh)

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: qtcreator 4.3.1-1ubuntu2
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: Sat Oct 21 12:04:39 2017
ExecutablePath: /usr/bin/qtcreator
InstallationDate: Installed on 2016-10-15 (370 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcCmdline: qtcreator
Signal: 6
SourcePackage: qtcreator
StacktraceTop:
 QMessageLogger::fatal(char const*, ...) const () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
 QXcbConnection::QXcbConnection(QXcbNativeInterface*, bool, unsigned int, char const*) () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
 QXcbIntegration::QXcbIntegration(QStringList const&, int&, char**) () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
 ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
 QPlatformIntegrationFactory::create(QString const&, QStringList const&, int&, char**, QString const&) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
Title: qtcreator crashed with SIGABRT in QMessageLogger::fatal()
UpgradeStatus: Upgraded to artful on 2017-10-21 (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 #1500179, 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.

[Gerhard Gonter (gg-lp)]

The bug https://bugs.launchpad.net/bugs/1500179 does not exist (any more).
Also, this crash happened right after upgrading to Ubuntu 17.10. qtcreator worked find on the same machine using Ubuntu 17.04 and 16.10.

[Gerhard Gonter (gg-lp)]

Problem solved:

It seems that the shell received an invalid value in the DISPLAY environment variable (wayland-0) and passed it to qtcreator. Manually changing DISPLAY to ":0" fixed the problem so that qtcreator started correctly. Also, selecting qtcreator as a favorite and starting it by clicking on the icon in the dock worked fine.