Bug 345759

Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-10-generic x86_64
Distribution: Ubuntu Vivid Vervet (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
Crash occured, after I had clicked System Settings from application launcher.

The crash can be reproduced sometimes.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe2dd3f8780 (LWP 1711))]

Thread 3 (Thread 0x7fe2ce247700 (LWP 1712)):
#0  0x00007fe2d9b608dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fe2d88a5b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fe2d88a764f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fe2d0792099 in QXcbEventReader::run (this=0x211f1b0) at qxcbconnection.cpp:1105
#4  0x00007fe2da1e1b0e in QThreadPrivate::start (arg=0x211f1b0) at thread/qthread_unix.cpp:337
#5  0x00007fe2d77bf6aa in start_thread (arg=0x7fe2ce247700) at pthread_create.c:333
#6  0x00007fe2d9b6beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fe2bd1cc700 (LWP 1749)):
#0  0x00007fe2d9b5c49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fe2d72e42f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe2d72a096c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe2d72a0e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe2d72a1242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe2bd6d4ae6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007fe2d72c7955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fe2d77bf6aa in start_thread (arg=0x7fe2bd1cc700) at pthread_create.c:333
#8  0x00007fe2d9b6beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fe2dd3f8780 (LWP 1711)):
[KCrash Handler]
#6  0x00007fe2da44fa74 in operator<< (dbg=..., o=o@entry=0x2121cc0) at kernel/qobject.cpp:4099
#7  0x00007fe2dac52f5a in QWindow::requestActivate (this=0x2121cc0) at kernel/qwindow.cpp:964
#8  0x00007fe2da45035a in call (a=0x7fff0aa0c250, r=0x7fff0aa0ccb0, this=0x216a090) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#9  QMetaObject::activate (sender=sender@entry=0x216e540, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff0aa0c250) at kernel/qobject.cpp:3702
#10 0x00007fe2da451057 in QMetaObject::activate (sender=sender@entry=0x216e540, m=m@entry=0x7fe2dc33ad00 <KDBusService::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff0aa0c250) at kernel/qobject.cpp:3582
#11 0x00007fe2dc135727 in KDBusService::activateRequested (this=this@entry=0x216e540, _t1=..., _t2=...) at moc_kdbusservice.cpp:191
#12 0x00007fe2dc132186 in KDBusService::Activate (this=0x216e540, platform_data=...) at ../../src/kdbusservice.cpp:191
#13 0x00007fe2dc135513 in KDBusServiceAdaptor::qt_metacall (this=0x216e490, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fff0aa0c400) at kdbusservice_adaptor.moc:137
#14 0x00007fe2dd5445c7 in QDBusConnectionPrivate::deliverCall (this=0x2121cc0, object=0x7fff0aa0c0c0, msg=..., metaTypes=..., slotIdx=0) at qdbusintegrator.cpp:993
#15 0x00007fe2dd548efc in QDBusConnectionPrivate::activateCall (this=0x2121cc0, this@entry=0x21489b0, object=0x216e490, flags=273, msg=...) at qdbusintegrator.cpp:898
#16 0x00007fe2dd5499bb in QDBusConnectionPrivate::activateObject (this=0x21489b0, node=..., msg=..., pathStartPos=<optimized out>) at qdbusintegrator.cpp:1460
#17 0x00007fe2dd54b7fe in QDBusActivateObjectEvent::placeMetaCall (this=0x471b1b0) at qdbusintegrator.cpp:1582
#18 0x00007fe2da45173a in QObject::event (this=0x216e540, e=<optimized out>) at kernel/qobject.cpp:1245
#19 0x00007fe2db20ab2c in QApplicationPrivate::notify_helper (this=0x2108680, receiver=0x216e540, e=0x471b1b0) at kernel/qapplication.cpp:3720
#20 0x00007fe2db210000 in QApplication::notify (this=0x7fff0aa0ccb0, receiver=0x216e540, e=0x471b1b0) at kernel/qapplication.cpp:3503
#21 0x00007fe2da41fc2b in QCoreApplication::notifyInternal (this=0x7fff0aa0ccb0, receiver=0x216e540, event=event@entry=0x471b1b0) at kernel/qcoreapplication.cpp:935
#22 0x00007fe2da421c9b in sendEvent (event=0x471b1b0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x2107db0) at kernel/qcoreapplication.cpp:1552
#24 0x00007fe2da422298 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#25 0x00007fe2da478843 in postEventSourceDispatch (s=0x2151460) at kernel/qeventdispatcher_glib.cpp:271
#26 0x00007fe2d72a0c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fe2d72a0f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fe2d72a0fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007fe2da478c57 in QEventDispatcherGlib::processEvents (this=0x2146c40, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#30 0x00007fe2da41d3e2 in QEventLoop::exec (this=this@entry=0x7fff0aa0cb90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#31 0x00007fe2da42502c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#32 0x00007fe2dac4531c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#33 0x00007fe2db2067a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#34 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi