Comment 2 for bug 1407556

StacktraceTop:
 qt_message_fatal (context=..., message=...) at global/qlogging.cpp:1364
 QMessageLogger::fatal (this=this@entry=0x7fff016396e0, msg=msg@entry=0x7f1868274578 "QXcbConnection: Could not connect to display %s") at global/qlogging.cpp:669
 QXcbConnection::QXcbConnection (this=0x1630e90, nativeInterface=0x16290b0, canGrabServer=<optimized out>, displayName=0x0) at qxcbconnection.cpp:322
 QXcbIntegration::QXcbIntegration (this=0x1626880, parameters=..., argc=@0x7fff01639b4c: 1, argv=0xffffffffffffffff) at qxcbintegration.cpp:162
 QXcbIntegrationPlugin::create (this=<optimized out>, system=..., parameters=..., argc=@0x7fff01639b4c: 1, argv=0x7fff01639fd8) at qxcbmain.cpp:58