Application that crashed: kontact
Version of the application: 4.3.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
On entering characters in the recipient list when LDAP lookup is enabled, Kmail will often crash.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  QListWidgetItem::text (this=0x0) at /usr/include/qt4/QtGui/qlistwidget.h:90
#6  0x00007f61ba736e8c in KPIM::AddresseeLineEdit::slotLDAPSearchData (this=<value optimized out>, adrs=<value optimized out>) at /build/buildd/kdepim-4.3.1/libkdepim/addresseelineedit.cpp:820
#7  0x00007f61ba737e3c in KPIM::AddresseeLineEdit::qt_metacall (this=0x46dfff0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffc3c8c930)
    at /build/buildd/kdepim-4.3.1/obj-x86_64-linux-gnu/libkdepim/addresseelineedit.moc:95
#8  0x00007f61a3343c7d in KMLineEdit::qt_metacall (this=0x7fffc3c8c780, _c=QMetaObject::InvokeMetaMethod, _id=75484336, _a=0x1)
    at /build/buildd/kdepim-4.3.1/obj-x86_64-linux-gnu/kmail/kmlineeditspell.moc:68
#9  0x00007f61a33b546d in RecipientLineEdit::qt_metacall (this=0x7fffc3c8c780, _c=QMetaObject::InvokeMetaMethod, _id=75484336, _a=0x1)
    at /build/buildd/kdepim-4.3.1/obj-x86_64-linux-gnu/kmail/recipientseditor.moc:123
#10 0x00007f61b61dcea2 in QMetaObject::activate (sender=0x2a89110, from_signal_index=<value optimized out>, to_signal_index=5, argv=0x1) at kernel/qobject.cpp:3113
#11 0x00007f61ba73ac15 in KPIM::LdapSearch::searchData (this=0x7fffc3c8c780, _t1=<value optimized out>) at /build/buildd/kdepim-4.3.1/obj-x86_64-linux-gnu/libkdepim/ldapclient.moc:205
#12 0x00007f61ba73dd31 in KPIM::LdapSearch::slotDataTimer (this=0x2a89110) at /build/buildd/kdepim-4.3.1/libkdepim/ldapclient.cpp:465
#13 0x00007f61ba73ddb5 in KPIM::LdapSearch::finish (this=0x2a89110) at /build/buildd/kdepim-4.3.1/libkdepim/ldapclient.cpp:472
#14 0x00007f61ba740718 in KPIM::LdapSearch::qt_metacall (this=0x2a89110, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffc3c8ca50)
    at /build/buildd/kdepim-4.3.1/obj-x86_64-linux-gnu/libkdepim/ldapclient.moc:184
#15 0x00007f61b61dcea2 in QMetaObject::activate (sender=0x2a711d0, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x1) at kernel/qobject.cpp:3113
#16 0x00007f61ba73b309 in KPIM::LdapClient::slotDone (this=0x2a711d0) at /build/buildd/kdepim-4.3.1/libkdepim/ldapclient.cpp:119
#17 0x00007f61ba740e60 in KPIM::LdapClient::qt_metacall (this=0x2a711d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffc3c8cbf0)
    at /build/buildd/kdepim-4.3.1/obj-x86_64-linux-gnu/libkdepim/ldapclient.moc:92
#18 0x00007f61b61dcea2 in QMetaObject::activate (sender=0x46ea3a0, from_signal_index=<value optimized out>, to_signal_index=7, argv=0x1) at kernel/qobject.cpp:3113
#19 0x00007f61b681b942 in KJob::result (this=0x7fffc3c8c780, _t1=0x46ea3a0) at /build/buildd/kde4libs-4.3.1/obj-x86_64-linux-gnu/kdecore/kjob.moc:188
#20 0x00007f61b681bcbf in KJob::emitResult (this=0x46ea3a0) at /build/buildd/kde4libs-4.3.1/kdecore/jobs/kjob.cpp:304
#21 0x00007f61b8633210 in KIO::SimpleJob::slotFinished (this=0x46ea3a0) at /build/buildd/kde4libs-4.3.1/kio/kio/job.cpp:477
#22 0x00007f61b86336c3 in KIO::TransferJob::slotFinished (this=0x46ea3a0) at /build/buildd/kde4libs-4.3.1/kio/kio/job.cpp:948
#23 0x00007f61b862e4b5 in KIO::TransferJob::qt_metacall (this=0x46ea3a0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffc3c8cff0)
    at /build/buildd/kde4libs-4.3.1/obj-x86_64-linux-gnu/kio/jobclasses.moc:343
#24 0x00007f61b61dcea2 in QMetaObject::activate (sender=0x3a48e00, from_signal_index=<value optimized out>, to_signal_index=8, argv=0x1) at kernel/qobject.cpp:3113
#25 0x00007f61b86ef891 in KIO::SlaveInterface::dispatch (this=0x3a48e00, _cmd=104, rawdata=<value optimized out>) at /build/buildd/kde4libs-4.3.1/kio/kio/slaveinterface.cpp:175
#26 0x00007f61b86ec3e2 in KIO::SlaveInterface::dispatch (this=0x3a48e00) at /build/buildd/kde4libs-4.3.1/kio/kio/slaveinterface.cpp:91
#27 0x00007f61b86def63 in KIO::Slave::gotInput (this=0x3a48e00) at /build/buildd/kde4libs-4.3.1/kio/kio/slave.cpp:322
#28 0x00007f61b86e11c8 in KIO::Slave::qt_metacall (this=0x3a48e00, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fffc3c8d410) at /build/buildd/kde4libs-4.3.1/obj-x86_64-linux-gnu/kio/slave.moc:76
#29 0x00007f61b61dcea2 in QMetaObject::activate (sender=0x2b2cec0, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x1) at kernel/qobject.cpp:3113
#30 0x00007f61b85fbdb1 in KIO::ConnectionPrivate::dequeue (this=0x3e48bf0) at /build/buildd/kde4libs-4.3.1/kio/kio/connection.cpp:82
#31 0x00007f61b85fc20a in KIO::Connection::qt_metacall (this=0x2b2cec0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x2b22790)
    at /build/buildd/kde4libs-4.3.1/obj-x86_64-linux-gnu/kio/connection.moc:73
#32 0x00007f61b61d75d8 in QObject::event (this=0x2b2cec0, e=0x3a50590) at kernel/qobject.cpp:1111
#33 0x00007f61b6d47f4d in QApplicationPrivate::notify_helper (this=0x247d370, receiver=0x2b2cec0, e=0x3a50590) at kernel/qapplication.cpp:4056
#34 0x00007f61b6d5018a in QApplication::notify (this=0x7fffc3c8de70, receiver=0x2b2cec0, e=0x3a50590) at kernel/qapplication.cpp:4021
#35 0x00007f61b814cdeb in KApplication::notify (this=0x7fffc3c8de70, receiver=0x2b2cec0, event=0x3a50590) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#36 0x00007f61b61c76ac in QCoreApplication::notifyInternal (this=0x7fffc3c8de70, receiver=0x2b2cec0, event=0x3a50590) at kernel/qcoreapplication.cpp:610
#37 0x00007f61b61c831a in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x244f850) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#38 0x00007f61b61f0e03 in postEventSourceDispatch (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#39 0x00007f61af91820a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#40 0x00007f61af91b8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#41 0x00007f61af91ba7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#42 0x00007f61b61f0a8f in QEventDispatcherGlib::processEvents (this=0x244f0a0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#43 0x00007f61b6de0bdf in QGuiEventDispatcherGlib::processEvents (this=0x7fffc3c8c780, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#44 0x00007f61b61c5f42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -1010246256}) at kernel/qeventloop.cpp:149
#45 0x00007f61b61c6314 in QEventLoop::exec (this=0x7fffc3c8ddd0, flags={i = -1010246176}) at kernel/qeventloop.cpp:201
#46 0x00007f61b61c85e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#47 0x0000000000404945 in main (argc=1, argv=0x7fffc3c8e558) at /build/buildd/kdepim-4.3.1/kontact/src/main.cpp:218

This bug may be a duplicate of or related to bug 206245

Reported using DrKonqi