Application: kontact (4.4.3)
KDE Platform Version: 4.4.4 (KDE 4.4.4)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-5-686-bigmem i686
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
I was starting Kontact and it prompted to log into the wallet subsystem, which I did, and I also have one account that isn't saved in the wallet. It then began downloading mail and crashed.

The crash can be reproduced some of the time.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[Current thread is 1 (Thread 0xb356f710 (LWP 12618))]

Thread 3 (Thread 0xade5fb70 (LWP 12724)):
#0  0xb78e2424 in __kernel_vsyscall ()
#1  0xb4381242 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_timedwait.S:179
#2  0xb60c7154 in __pthread_cond_timedwait (cond=0x8ea7dc8, mutex=0x8ea7db0, abstime=0xade5f2a0) at forward.c:152
#3  0xb6d3a7ef in QWaitConditionPrivate::wait (this=0x882ea14, mutex=0x882ea10, time=30000) at thread/qwaitcondition_unix.cpp:85
#4  QWaitCondition::wait (this=0x882ea14, mutex=0x882ea10, time=30000) at thread/qwaitcondition_unix.cpp:159
#5  0xb6d2eb7b in QThreadPoolThread::run (this=0x83fd648) at concurrent/qthreadpool.cpp:140
#6  0xb6d3993e in QThreadPrivate::start (arg=0x83fd648) at thread/qthread_unix.cpp:248
#7  0xb437c955 in start_thread (arg=0xade5fb70) at pthread_create.c:300
#8  0xb60ba14e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 2 (Thread 0xad65eb70 (LWP 12725)):
#0  0xb78e2424 in __kernel_vsyscall ()
#1  0xb4381242 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_timedwait.S:179
#2  0xb60c7154 in __pthread_cond_timedwait (cond=0x8ea7dc8, mutex=0x8ea7db0, abstime=0xad65e2a0) at forward.c:152
#3  0xb6d3a7ef in QWaitConditionPrivate::wait (this=0x882ea14, mutex=0x882ea10, time=30000) at thread/qwaitcondition_unix.cpp:85
#4  QWaitCondition::wait (this=0x882ea14, mutex=0x882ea10, time=30000) at thread/qwaitcondition_unix.cpp:159
#5  0xb6d2eb7b in QThreadPoolThread::run (this=0x8e8b980) at concurrent/qthreadpool.cpp:140
#6  0xb6d3993e in QThreadPrivate::start (arg=0x8e8b980) at thread/qthread_unix.cpp:248
#7  0xb437c955 in start_thread (arg=0xad65eb70) at pthread_create.c:300
#8  0xb60ba14e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb356f710 (LWP 12618)):
[KCrash Handler]
#6  SkipSorting (this=0xb61327a8, item=0x88a37c0, expand=false) at ../../include/QtGui/private/../../../src/gui/itemviews/qtreewidget_p.h:171
#7  QTreeWidget::setItemExpanded (this=0xb61327a8, item=0x88a37c0, expand=false) at itemviews/qtreewidget.cpp:3132
#8  0xaf4b2261 in QTreeWidgetItem::setExpanded (this=0x8cb4400) at /usr/include/qt4/QtGui/qtreewidget.h:409
#9  KMail::FolderView::restoreItemStates (this=0x8cb4400) at ../../kmail/folderview.cpp:389
#10 0xaf4b90cd in KMail::FolderView::reload (this=0x8cb4400, openFoldersForUpdate=false) at ../../kmail/folderview.cpp:671
#11 0xaf72067b in KMMainWidget::readConfig (this=0x8a512b0) at ../../kmail/kmmainwidget.cpp:593
#12 0xaf7337f1 in KMMainWidget (this=0x8a512b0, parent=0x883fe30, aGUIClient=0x850442c, actionCollection=0x8475dd0, config=...) at ../../kmail/kmmainwidget.cpp:232
#13 0xafb53a1b in KMailPart (this=0x8504408, parentWidget=0x8396900, parent=0x8396900, __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>) at ../../kmail/kmail_part.cpp:112
#14 0xafb54362 in KPluginFactory::createPartInstance<KMailPart> (parentWidget=0x8396900, parent=0x8396900, args=...) at /usr/include/kpluginfactory.h:467
#15 0xb71547ee in KPluginFactory::create (this=0x8515a60, iface=0xb5fe73a0 "KParts::ReadOnlyPart", parentWidget=0x8396900, parent=0x8396900, args=..., keyword=...)
    at ../../kdecore/util/kpluginfactory.cpp:191
#16 0xb7719505 in KPluginFactory::create<KParts::ReadOnlyPart> (this=0x8396900, libname=0x84cc010 "kmailpart") at /usr/include/kpluginfactory.h:491
#17 KontactInterface::Core::createPart (this=0x8396900, libname=0x84cc010 "kmailpart") at ../../kontactinterface/core.cpp:87
#18 0xb771a817 in KontactInterface::Plugin::loadPart (this=0x84b9f20) at ../../kontactinterface/plugin.cpp:152
#19 0xafb98eb5 in KMailPlugin::createPart (this=0x84b9f20) at ../../../../kontact/plugins/kmail/kmail_plugin.cpp:179
#20 0xb771bb73 in KontactInterface::Plugin::part (this=0x84b9f20) at ../../kontactinterface/plugin.cpp:191
#21 0xb78ab705 in Kontact::MainWindow::selectPlugin (this=0x8396900, plugin=0x84b9f20) at ../../../kontact/src/mainwindow.cpp:778
#22 0xb78a5dfc in Kontact::MainWindow::loadSettings (this=0x8396900) at ../../../kontact/src/mainwindow.cpp:944
#23 0xb78aeac1 in Kontact::MainWindow::initObject (this=0x8396900) at ../../../kontact/src/mainwindow.cpp:210
#24 0xb78b00ed in MainWindow (this=0x8396900, __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>) at ../../../kontact/src/mainwindow.cpp:146
#25 0x0804be0e in KontactApp::newInstance (this=0xbfa07eb4) at ../../../kontact/src/main.cpp:136
#26 0xb7391150 in KUniqueApplicationAdaptor::newInstance (this=0x834a888, asn_id=..., args=...) at ../../kdeui/kernel/kuniqueapplication.cpp:454
#27 0xb73918b2 in KUniqueApplicationAdaptor::qt_metacall (this=0x834a888, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfa072d8) at ./kuniqueapplication_p.moc:81
#28 0xb561cd61 in QDBusConnectionPrivate::deliverCall (this=0x8248490, object=0x834a888, msg=..., metaTypes=..., slotIdx=4) at qdbusintegrator.cpp:904
#29 0xb561df3f in QDBusConnectionPrivate::activateCall (this=0x8248490, object=0x834a888, flags=337, msg=...) at qdbusintegrator.cpp:809
#30 0xb561e9e0 in QDBusConnectionPrivate::activateObject (this=0x8248490, node=..., msg=..., pathStartPos=16) at qdbusintegrator.cpp:1364
#31 0xb561ec7a in QDBusActivateObjectEvent::placeMetaCall (this=0x83956c8) at qdbusintegrator.cpp:1477
#32 0xb6e4c11e in QObject::event (this=0xbfa07eb4, e=0x83956c8) at kernel/qobject.cpp:1248
#33 0xb6e3b3fb in QCoreApplication::event (this=0xbfa07eb4, e=0x83956c8) at kernel/qcoreapplication.cpp:1533
#34 0xb6386556 in QApplication::event (this=0xbfa07eb4, e=0x83956c8) at kernel/qapplication.cpp:2353
#35 0xb6381bec in QApplicationPrivate::notify_helper (this=0x8250860, receiver=0xbfa07eb4, e=0x83956c8) at kernel/qapplication.cpp:4300
#36 0xb638875e in QApplication::notify (this=0xbfa07eb4, receiver=0xbfa07eb4, e=0x83956c8) at kernel/qapplication.cpp:3704
#37 0xb7389b4a in KApplication::notify (this=0xbfa07eb4, receiver=0xbfa07eb4, event=0x83956c8) at ../../kdeui/kernel/kapplication.cpp:302
#38 0xb6e3b92b in QCoreApplication::notifyInternal (this=0xbfa07eb4, receiver=0xbfa07eb4, event=0x83956c8) at kernel/qcoreapplication.cpp:704
#39 0xb6e3e303 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x8230dd0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#40 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8230dd0) at kernel/qcoreapplication.cpp:1345
#41 0xb6e3e46d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1238
#42 0xb6e6783f in QCoreApplication::sendPostedEvents (s=0x825b910) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#43 postEventSourceDispatch (s=0x825b910) at kernel/qeventdispatcher_glib.cpp:276
#44 0xb42d62f5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#45 0xb42d9fd8 in ?? () from /lib/libglib-2.0.so.0
#46 0xb42da1b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#47 0xb6e67335 in QEventDispatcherGlib::processEvents (this=0x8230898, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#48 0xb6440255 in QGuiEventDispatcherGlib::processEvents (this=0x8230898, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#49 0xb6e39f49 in QEventLoop::processEvents (this=0x835d530, flags=) at kernel/qeventloop.cpp:149
#50 0xb6e3a39a in QEventLoop::exec (this=0x835d530, flags=...) at kernel/qeventloop.cpp:201
#51 0xb76029cb in Akonadi::Control::Private::exec (this=0x83490c8) at ../../akonadi/control.cpp:137
#52 0xb7602f4e in Akonadi::Control::start () at ../../akonadi/control.cpp:206
#53 0xb76031a3 in Akonadi::Control::start (parent=0x0) at ../../akonadi/control.cpp:233
#54 0x0804b451 in main (argc=1, argv=0xbfa080d4) at ../../../kontact/src/main.cpp:204

Reported using DrKonqi