Application that crashed: kmail
Version of the application: 1.11.90
KDE Version: 4.2.91 (KDE 4.2.91 (KDE 4.3 >= 20090609))
Qt Version: 4.5.1
Operating System: Linux 2.6.24.7 i686

What I was doing when the application crashed:
I was trying to compose a message and entered the first two characters of the recipients name and waited a few seconds for the suggestion list to show. As it didn't show after some time I switched to the next recipient field and back again - which usually resolves the issue of the not appearing suggestion list. The list did in fact now pop up but the next second the crash happened.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#6  0xb761bf19 in KMLineEdit::loadContacts (this=0x83d17b0) at /root/kdesvn-trunk/kdepim/kmail/kmlineeditspell.cpp:207
#7  0xb7165f61 in KPIM::AddresseeLineEdit::doCompletion (this=0x83d17b0, ctrlT=false) at /root/kdesvn-trunk/kdepim/libkdepim/addresseelineedit.cpp:386
#8  0xb7167a45 in KPIM::AddresseeLineEdit::slotCompletion (this=0x83d17b0) at /root/kdesvn-trunk/kdepim/libkdepim/addresseelineedit.cpp:945
#9  0xb7167d33 in KPIM::AddresseeLineEdit::qt_metacall (this=0x83d17b0, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0xbfb86a2c) at /root/kdesvn-trunk/build/kdepim/libkdepim/addresseelineedit.moc:91
#10 0xb761bcfa in KMLineEdit::qt_metacall (this=0x83d17b0, _c=QMetaObject::InvokeMetaMethod, _id=80, _a=0xbfb86a2c) at /root/kdesvn-trunk/build/kdepim/kmail/kmlineeditspell.moc:68
#11 0xb76928ca in RecipientLineEdit::qt_metacall (this=0x83d17b0, _c=QMetaObject::InvokeMetaMethod, _id=80, _a=0xbfb86a2c) at /root/kdesvn-trunk/build/kdepim/kmail/recipientseditor.moc:123
#12 0xb6aaabaf in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#13 0xb6aab122 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#14 0xb7e35d44 in KLineEdit::completion (this=0x83d17b0, _t1=@0xbfb86ad0) at /root/kdesvn-trunk/build/kdelibs/kdeui/klineedit.moc:227
#15 0xb7e35ef4 in KLineEdit::doCompletion (this=0x83d17b0, txt=@0xbfb86ad0) at /root/kdesvn-trunk/kdelibs/kdeui/widgets/klineedit.cpp:1753
#16 0xb7e3b6fe in KLineEdit::keyPressEvent (this=0x83d17b0, e=0xbfb87174) at /root/kdesvn-trunk/kdelibs/kdeui/widgets/klineedit.cpp:927
#17 0xb7167eb0 in KPIM::AddresseeLineEdit::keyPressEvent (this=0x83d17b0, e=0xbfb87174) at /root/kdesvn-trunk/kdepim/libkdepim/addresseelineedit.cpp:205
#18 0xb761b98e in KMLineEdit::keyPressEvent (this=0x83d17b0, e=0xbfb87174) at /root/kdesvn-trunk/kdepim/kmail/kmlineeditspell.cpp:74
#19 0xb7693e17 in RecipientLineEdit::keyPressEvent (this=0x83d17b0, ev=0xbfb87174) at /root/kdesvn-trunk/kdepim/kmail/recipientseditor.cpp:141
#20 0xb61984ca in QWidget::event () from /usr/lib/qt4/libQtGui.so.4
#21 0xb6531525 in QLineEdit::event () from /usr/lib/qt4/libQtGui.so.4
#22 0xb7e3951f in KLineEdit::event (this=0x83d17b0, ev=0xbfb87174) at /root/kdesvn-trunk/kdelibs/kdeui/widgets/klineedit.cpp:1323
#23 0xb614b71f in QApplicationPrivate::notify_helper () from /usr/lib/qt4/libQtGui.so.4
#24 0xb61522c3 in QApplication::notify () from /usr/lib/qt4/libQtGui.so.4
#25 0xb7d55a2a in KApplication::notify (this=0xbfb88bd8, receiver=0x83d17b0, event=0xbfb87174) at /root/kdesvn-trunk/kdelibs/kdeui/kernel/kapplication.cpp:302
#26 0xb6a98bf8 in QCoreApplication::notifyInternal () from /usr/lib/qt4/libQtCore.so.4
#27 0xb614bbfe in ?? () from /usr/lib/qt4/libQtGui.so.4
#28 0xbfb88bd8 in ?? ()
#29 0x083d17b0 in ?? ()
#30 0xbfb87174 in ?? ()
#31 0x00000000 in ?? ()

Reported using DrKonqi