Application: apper (0.7.1)
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.8.0
Operating System: Linux 3.2.3-2.fc16.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
- What I was doing when the application crashed:

I tried to update my system via Apper and it crashed. Prior to crashing, the GUI said "40%: Waiting for process to start"

The crash can be reproduced every time.

-- Backtrace:
Application: Apper (apper), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#6  0x0000003ccce2cc84 in QStackedWidget::setCurrentIndex (this=0x10f12a0, index=0) at widgets/qstackedwidget.cpp:258
#7  0x00007f35f150b830 in ApperKCM::on_backTB_clicked (this=0x1035270) at /usr/src/debug/apper-0.7.1/ApperKCM/ApperKCM.cpp:542
#8  0x00007f35f150caa7 in ApperKCM::qt_metacall (this=0x1035270, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0x7fff8fa2dcf0) at /usr/src/debug/apper-0.7.1/x86_64-redhat-linux-gnu/ApperKCM/ApperKCM.moc:143
#9  0x0000003cc818cedd in QMetaObject::activate (sender=0x10f68c0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff8fa2dcf0) at kernel/qobject.cpp:3566
#10 0x0000003ccd04d202 in QAbstractButton::clicked (this=<optimized out>, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:220
#11 0x0000003cccd8f5be in QAbstractButtonPrivate::emitClicked (this=0x10ff180) at widgets/qabstractbutton.cpp:546
#12 0x0000003cccd908fb in QAbstractButtonPrivate::click (this=0x10ff180) at widgets/qabstractbutton.cpp:539
#13 0x0000003cccd90b6c in QAbstractButton::mouseReleaseEvent (this=0x10f68c0, e=0x7fff8fa2e5d0) at widgets/qabstractbutton.cpp:1121
#14 0x0000003ccce4dcba in QToolButton::mouseReleaseEvent (this=<optimized out>, e=<optimized out>) at widgets/qtoolbutton.cpp:718
#15 0x0000003ccca1a02a in QWidget::event (this=0x10f68c0, event=0x7fff8fa2e5d0) at kernel/qwidget.cpp:8361
#16 0x0000003ccc9c9994 in notify_helper (e=0x7fff8fa2e5d0, receiver=0x10f68c0, this=0xe2b670) at kernel/qapplication.cpp:4550
#17 QApplicationPrivate::notify_helper (this=0xe2b670, receiver=0x10f68c0, e=0x7fff8fa2e5d0) at kernel/qapplication.cpp:4522
#18 0x0000003ccc9cf0e3 in QApplication::notify (this=<optimized out>, receiver=0x10f68c0, e=0x7fff8fa2e5d0) at kernel/qapplication.cpp:4093
#19 0x0000003ccd850766 in KApplication::notify (this=0x7fff8fa2f2d0, receiver=0x10f68c0, event=0x7fff8fa2e5d0) at /usr/src/debug/kdelibs-4.7.4/kdeui/kernel/kapplication.cpp:311
#20 0x0000003cc817904c in QCoreApplication::notifyInternal (this=0x7fff8fa2f2d0, receiver=0x10f68c0, event=0x7fff8fa2e5d0) at kernel/qcoreapplication.cpp:876
#21 0x0000003ccc9ca962 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:231
#22 QApplicationPrivate::sendMouseEvent (receiver=0x10f68c0, event=0x7fff8fa2e5d0, alienWidget=0x10f68c0, nativeWidget=0xf4db30, buttonDown=0x10f68c0, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3161
#23 0x0000003ccca462e5 in QETWidget::translateMouseEvent (this=0xf4db30, event=<optimized out>) at kernel/qapplication_x11.cpp:4520
#24 0x0000003ccca451aa in QApplication::x11ProcessEvent (this=0x7fff8fa2f2d0, event=0x7fff8fa2ee90) at kernel/qapplication_x11.cpp:3641
#25 0x0000003ccca6c97c in x11EventSourceDispatch (s=0xe34fd0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148
#26 0x0000003cc0c44acd in g_main_dispatch (context=0xe2ece0) at gmain.c:2441
#27 g_main_context_dispatch (context=0xe2ece0) at gmain.c:3011
#28 0x0000003cc0c452c8 in g_main_context_iterate (context=0xe2ece0, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3089
#29 0x0000003cc0c4549c in g_main_context_iteration (context=0xe2ece0, may_block=1) at gmain.c:3152
#30 0x0000003cc81a7d5f in QEventDispatcherGlib::processEvents (this=0xe07990, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#31 0x0000003ccca6c66e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:207
#32 0x0000003cc8178182 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#33 0x0000003cc81783d7 in QEventLoop::exec (this=0x7fff8fa2f260, flags=...) at kernel/qeventloop.cpp:204
#34 0x0000003cc817cdd5 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#35 0x0000000000406a5e in main (argc=1, argv=0x7fff8fa2f9d8) at /usr/src/debug/apper-0.7.1/Apper/main.cpp:136

Possible duplicates by query: bug 289899, bug 289712, bug 289689, bug 286403.

Reported using DrKonqi