signon-ui crashed with SIGABRT in qt_message_fatal()

[Alan]

Crash with Xvnc

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: signon-ui 0.15daily13.06.12-0ubuntu1
ProcVersionSignature: Ubuntu 3.9.0-7.15-generic 3.9.7
Uname: Linux 3.9.0-7-generic i686
NonfreeKernelModules: wl
ApportVersion: 2.10.2-0ubuntu2
Architecture: i386
Date: Wed Jun 26 03:23:24 2013
ExecutablePath: /usr/bin/signon-ui
InstallationDate: Installed on 2013-06-19 (6 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
MarkForUpload: True
ProcCmdline: /usr/bin/signon-ui
Signal: 6
SourcePackage: signon-ui
StacktraceTop:
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 QMessageLogger::fatal(char const*, ...) const () from /usr/lib/i386-linux-gnu/libQt5Core.so.5
 ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqxcb.so
 ?? () from /usr/lib/i386-linux-gnu/qt5/plugins/platforms/libqxcb.so
Title: signon-ui crashed with SIGABRT in raise()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 qt_message_fatal (context=..., message=...) at global/qlogging.cpp:868
 QMessageLogger::fatal (this=0xbfeaa590, msg=0xb11ee1d0 "QXcbConnection: Could not connect to display %s") at global/qlogging.cpp:356
 QXcbConnection::QXcbConnection (this=0x8fc8530, nativeInterface=0x8fc3370, displayName=0x0) at qxcbconnection.cpp:284
 QXcbIntegration::QXcbIntegration (this=0x8fc28c0, parameters=...) at qxcbintegration.cpp:105
 QXcbIntegrationPlugin::create (this=0x8fc3108, system=..., parameters=...) at main.cpp:58

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.