Application: kontact (4.4.2)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-19-generic x86_64
Distribution: Ubuntu lucid (development branch)

-- Information about the crash:
Kontact crashes on launch. I can get it to work if I first open Kmail.

This also happened in Karmic

The crash can be reproduced every time.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  QString (this=0x0) at /usr/include/qt4/QtCore/qstring.h:714
#6  KIO::Slave::protocol (this=0x0) at ../../kio/kio/slave.cpp:176
#7  0x00007f1f8c592d3f in KIO::SchedulerPrivate::assignJobToSlave (this=0x1afb570, slave=0x0, job=0x1fb2940) at ../../kio/kio/scheduler.cpp:1073
#8  0x00007f1f6ee78d6a in KMail::SearchJob::searchCompleteFolder (this=0x21f4c70) at ../../kmail/searchjob.cpp:95
#9  0x00007f1f6eca3f38 in KMFolderImap::search (this=0x1f89c00, pattern=0x1f89be0) at ../../kmail/kmfolderimap.cpp:2403
#10 0x00007f1f6ede16d7 in KMSearch::slotProcessNextBatch (this=0x2024420) at ../../kmail/kmfoldersearch.cpp:272
#11 0x00007f1f6ede2840 in KMSearch::qt_metacall (this=0x2024420, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff80be70e0) at ./kmfoldersearch.moc:85
#12 0x00007f1f8ed63e3f in QMetaObject::activate (sender=0x1fa7200, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x22672e0) at kernel/qobject.cpp:3293
#13 0x00007f1f8ed60a63 in QObject::event (this=0x1fa7200, e=0x7fff80be7830) at kernel/qobject.cpp:1212
#14 0x00007f1f8e10a22c in QApplicationPrivate::notify_helper (this=0x171e700, receiver=0x1fa7200, e=0x7fff80be7830) at kernel/qapplication.cpp:4300
#15 0x00007f1f8e1106fb in QApplication::notify (this=0x7fff80bea9a0, receiver=0x1fa7200, e=0x7fff80be7830) at kernel/qapplication.cpp:4183
#16 0x00007f1f8f739526 in KApplication::notify (this=0x7fff80bea9a0, receiver=0x1fa7200, event=0x7fff80be7830) at ../../kdeui/kernel/kapplication.cpp:302
#17 0x00007f1f8ed5106c in QCoreApplication::notifyInternal (this=0x7fff80bea9a0, receiver=0x1fa7200, event=0x7fff80be7830) at kernel/qcoreapplication.cpp:704
#18 0x00007f1f8ed7dd42 in QCoreApplication::sendEvent (this=0x1724cc0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x1724cc0) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f1f8ed7a824 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007f1f864c28c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#22 0x00007f1f864c6748 in ?? () from /lib/libglib-2.0.so.0
#23 0x00007f1f864c68fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#24 0x00007f1f8ed7a513 in QEventDispatcherGlib::processEvents (this=0x16f3990, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#25 0x00007f1f8e1ba31e in QGuiEventDispatcherGlib::processEvents (this=0x7fff80be6da0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f1f8ed4f992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#27 0x00007f1f8ed4fd6c in QEventLoop::exec (this=0x7fff80be7c10, flags=) at kernel/qeventloop.cpp:201
#28 0x00007f1f8f7c9ec6 in KWallet::Wallet::openWallet (name=<value optimized out>, w=<value optimized out>, ot=KWallet::Wallet::Synchronous) at ../../kdeui/util/kwallet.cpp:260
#29 0x00007f1f6ecf11f4 in KMKernel::wallet (this=0x1ada330) at ../../kmail/kmkernel.cpp:2498
#30 0x00007f1f6ec7b751 in KMail::NetworkAccount::readPassword (this=0x202e650) at ../../kmail/networkaccount.cpp:338
#31 0x00007f1f6ec1a6da in KMail::AccountManager::readPasswords (this=<value optimized out>) at ../../kmail/accountmanager.cpp:438
#32 0x00007f1f6ec7926d in KMail::NetworkAccount::passwd (this=<value optimized out>) at ../../kmail/networkaccount.cpp:95
#33 0x00007f1f6ec89d78 in KMail::ImapAccountBase::makeConnection (this=0x202e650) at ../../kmail/imapaccountbase.cpp:306
#34 0x00007f1f6ecabcf3 in KMFolderImap::listDirectory (this=0x1f43aa0) at ../../kmail/kmfolderimap.cpp:736
#35 0x00007f1f6eb858d9 in KMail::FolderView::slotFolderExpanded (this=<value optimized out>, item=<value optimized out>) at ../../kmail/folderview.cpp:2465
#36 0x00007f1f6eb8ff2b in KMail::FolderView::qt_metacall (this=0x2126680, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff80be8300) at ./folderview.moc:234
#37 0x00007f1f6eb94480 in KMail::MainFolderView::qt_metacall (this=0x7fff80be6da0, _c=QMetaObject::InvokeMetaMethod, _id=33237249, _a=0x22672e0) at ./mainfolderview.moc:70
#38 0x00007f1f8ed63e3f in QMetaObject::activate (sender=0x2126680, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x22672e0) at kernel/qobject.cpp:3293
#39 0x00007f1f8e6a6152 in QTreeWidget::itemExpanded (this=0x7fff80be6da0, _t1=0x2182e50) at .moc/release-shared/moc_qtreewidget.cpp:242
#40 0x00007f1f8e6b1ee3 in QTreeWidget::qt_metacall (this=0x2126680, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff80be84f0) at .moc/release-shared/moc_qtreewidget.cpp:155
#41 0x00007f1f901a6230 in KPIM::TreeWidget::qt_metacall (this=0x7fff80be6da0, _c=QMetaObject::InvokeMetaMethod, _id=33237249, _a=0x22672e0) at moc_treewidget.cpp:74
#42 0x00007f1f9021b6d0 in KPIM::FolderTreeWidget::qt_metacall (this=0x7fff80be6da0, _c=QMetaObject::InvokeMetaMethod, _id=33237249, _a=0x22672e0) at ./foldertreewidget.moc:74
#43 0x00007f1f6eb8fec0 in KMail::FolderView::qt_metacall (this=0x7fff80be6da0, _c=QMetaObject::InvokeMetaMethod, _id=33237249, _a=0x22672e0) at ./folderview.moc:200
#44 0x00007f1f6eb94480 in KMail::MainFolderView::qt_metacall (this=0x7fff80be6da0, _c=QMetaObject::InvokeMetaMethod, _id=33237249, _a=0x22672e0) at ./mainfolderview.moc:70
#45 0x00007f1f8ed63e3f in QMetaObject::activate (sender=0x2126680, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x22672e0) at kernel/qobject.cpp:3293
#46 0x00007f1f8e667552 in QTreeView::expanded (this=0x7fff80be6da0, _t1=<value optimized out>) at .moc/release-shared/moc_qtreeview.cpp:201
#47 0x00007f1f8e679733 in QTreeView::expand (this=0x2126680, index=...) at itemviews/qtreeview.cpp:744
#48 0x00007f1f8e6adf51 in QTreeWidget::setItemExpanded (this=0x2126680, item=0x2182e50, expand=<value optimized out>) at itemviews/qtreewidget.cpp:3133
#49 0x00007f1f6eb89614 in QTreeWidgetItem::setExpanded (this=0x2126680) at /usr/include/qt4/QtGui/qtreewidget.h:409
#50 KMail::FolderView::restoreItemStates (this=0x2126680) at ../../kmail/folderview.cpp:389
#51 0x00007f1f6eb8fc87 in KMail::FolderView::reload (this=0x2126680, openFoldersForUpdate=false) at ../../kmail/folderview.cpp:671
#52 0x00007f1f6edc4817 in KMMainWidget::readConfig (this=0x2046a00) at ../../kmail/kmmainwidget.cpp:593
#53 0x00007f1f6edd57e9 in KMMainWidget (this=0x2046a00, parent=<value optimized out>, aGUIClient=<value optimized out>, actionCollection=<value optimized out>, config=...)
    at ../../kmail/kmmainwidget.cpp:232
#54 0x00007f1f6f398498 in KMailPart (this=0x1c758f0, parentWidget=<value optimized out>, parent=<value optimized out>, __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>)
    at ../../kmail/kmail_part.cpp:112
#55 0x00007f1f6f398c9f in KPluginFactory::createPartInstance<KMailPart> (parentWidget=0x171fe00, parent=0x171fe00, args=...) at /usr/include/kpluginfactory.h:467
#56 0x00007f1f8f27096c in KPluginFactory::create (this=0x1c817f0, iface=0x7f1f8d6a75c0 "KParts::ReadOnlyPart", parentWidget=<value optimized out>, parent=0x171fe00, args=..., 
    keyword=<value optimized out>) at ../../kdecore/util/kpluginfactory.cpp:191
#57 0x00007f1f8ff1f56a in KPluginFactory::create<KParts::ReadOnlyPart> (this=0x171fe00, libname=0x1c3e888 "kmailpart") at /usr/include/kpluginfactory.h:491
#58 KontactInterface::Core::createPart (this=0x171fe00, libname=0x1c3e888 "kmailpart") at ../../kontactinterface/core.cpp:87
#59 0x00007f1f710a5210 in KMailPlugin::createPart (this=0x7fff80be6da0) at ../../../../kontact/plugins/kmail/kmail_plugin.cpp:179
#60 0x00007f1f8ff21879 in KontactInterface::Plugin::part (this=0x7fff80be6da0) at ../../kontactinterface/plugin.cpp:191
#61 0x00007f1f904d408f in Kontact::MainWindow::selectPlugin (this=0x171fe00, plugin=0x1c185c0) at ../../../kontact/src/mainwindow.cpp:778
#62 0x00007f1f904cee6c in Kontact::MainWindow::loadSettings (this=0x171fe00) at ../../../kontact/src/mainwindow.cpp:944
#63 0x00007f1f904d7110 in Kontact::MainWindow::initObject (this=0x171fe00) at ../../../kontact/src/mainwindow.cpp:210
#64 0x00007f1f904d858c in MainWindow (this=0x171fe00, __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>) at ../../../kontact/src/mainwindow.cpp:146
#65 0x0000000000404804 in KontactApp::newInstance (this=0x7fff80bea9a0) at ../../../kontact/src/main.cpp:136
#66 0x00007f1f8f7406b6 in KUniqueApplicationAdaptor::newInstance (this=0x18fa610, asn_id=<value optimized out>, args=...) at ../../kdeui/kernel/kuniqueapplication.cpp:454
#67 0x00007f1f8f740cf6 in KUniqueApplicationAdaptor::qt_metacall (this=0x18fa610, _c=QMetaObject::InvokeMetaMethod, _id=6317216, _a=0x7fff80be9b60) at ./kuniqueapplication_p.moc:81
#68 0x00007f1f8c19d486 in QDBusConnectionPrivate::deliverCall (this=<value optimized out>, object=<value optimized out>, msg=<value optimized out>, metaTypes=..., slotIdx=<value optimized out>)
    at qdbusintegrator.cpp:904
#69 0x00007f1f8c19e6ef in QDBusConnectionPrivate::activateCall (this=<value optimized out>, object=0x18fa610, flags=337, msg=...) at qdbusintegrator.cpp:809
#70 0x00007f1f8c19f1cd in QDBusConnectionPrivate::activateObject (this=<value optimized out>, node=<value optimized out>, msg=..., pathStartPos=<value optimized out>) at qdbusintegrator.cpp:1364
#71 0x00007f1f8c19f468 in QDBusActivateObjectEvent::placeMetaCall (this=0x1981810) at qdbusintegrator.cpp:1477
#72 0x00007f1f8ed60d49 in QObject::event (this=0x7fff80bea9a0, e=0x1981810) at kernel/qobject.cpp:1248
#73 0x00007f1f8e10e59d in QApplication::event (this=0x7fff80bea9a0, e=0x1981810) at kernel/qapplication.cpp:2353
#74 0x00007f1f8e10a22c in QApplicationPrivate::notify_helper (this=0x171e700, receiver=0x7fff80bea9a0, e=0x1981810) at kernel/qapplication.cpp:4300
#75 0x00007f1f8e1106fb in QApplication::notify (this=0x7fff80bea9a0, receiver=0x7fff80bea9a0, e=0x1981810) at kernel/qapplication.cpp:4183
#76 0x00007f1f8f739526 in KApplication::notify (this=0x7fff80bea9a0, receiver=0x7fff80bea9a0, event=0x1981810) at ../../kdeui/kernel/kapplication.cpp:302
#77 0x00007f1f8ed5106c in QCoreApplication::notifyInternal (this=0x7fff80bea9a0, receiver=0x7fff80bea9a0, event=0x1981810) at kernel/qcoreapplication.cpp:704
#78 0x00007f1f8ed537e7 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x16f4240) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#79 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x16f4240) at kernel/qcoreapplication.cpp:1345
#80 0x00007f1f8ed7a9d3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#81 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#82 0x00007f1f864c28c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#83 0x00007f1f864c6748 in ?? () from /lib/libglib-2.0.so.0
#84 0x00007f1f864c68fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#85 0x00007f1f8ed7a513 in QEventDispatcherGlib::processEvents (this=0x16f3990, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#86 0x00007f1f8e1ba31e in QGuiEventDispatcherGlib::processEvents (this=0x7fff80be6da0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#87 0x00007f1f8ed4f992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#88 0x00007f1f8ed4fd6c in QEventLoop::exec (this=0x7fff80bea8e0, flags=) at kernel/qeventloop.cpp:201
#89 0x00007f1f8ed53aab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#90 0x0000000000403e8e in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../kontact/src/main.cpp:224

Reported using DrKonqi