Application that crashed: kontact
Version of the application: 4.3.0 rc3
KDE Version: 4.2.98 (KDE 4.2.98 (KDE 4.3 RC3))
Qt Version: 4.5.2
Operating System: Linux 2.6.30-gentoo-r2 x86_64

What I was doing when the application crashed:
I am currently sitting in the train. Online via a slow GPRS link.
Kontact was syncing mails (dimap) in the background (kontact window open, but no focus - I was reading news in akkregator (not embedded in kontact) when this crash happened

 -- Backtrace:
Application: Kontact (kontact), signal: Aborted
[KCrash Handler]
#5  0x00007f7f92b1e645 in raise () from /lib/libc.so.6
#6  0x00007f7f92b1fb63 in abort () from /lib/libc.so.6
#7  0x00007f7f931a7b75 in qt_message_output () from /usr/lib64/qt4/libQtCore.so.4
#8  0x00007f7f931a7c90 in qFatal () from /usr/lib64/qt4/libQtCore.so.4
#9  0x00007f7f7e4f2c17 in KMail::MessageProperty::forget (msgBase=0x1a000e0) at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/messageproperty.cpp:180
#10 0x00007f7f7e53c8da in ~KMMsgBase (this=0x4694) at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/kmmsgbase.cpp:128
#11 0x00007f7f7e42c673 in ~KMMessage (this=0x1a000e0) at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/kmmessage.cpp:227
#12 0x00007f7f7e53d321 in KMMsgList::clear (this=0xecb378, doDelete=true, syncDict=false) at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/kmmsglist.cpp:37
#13 0x00007f7f7e58a09d in KMFolderMaildir::reallyDoClose (this=0xecb300) at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/kmfoldermaildir.cpp:203
#14 0x00007f7f7e570763 in KMFolderCachedImap::resetSyncState (this=0xecb300) at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/kmfoldercachedimap.cpp:2598
#15 0x00007f7f7e555d53 in KMAcctCachedImap::killAllJobs (this=<value optimized out>, disconnectSlave=<value optimized out>)
    at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/kmacctcachedimap.cpp:110
#16 0x00007f7f7e546b8f in KMail::ImapAccountBase::handleError (this=0x62dba0, errorCode=149, errorMsg=@0x7fff348f1380, job=0x1847910, context=@0x7fff348f1580, abortSync=false)
    at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/imapaccountbase.cpp:1022
#17 0x00007f7f7e548eb0 in KMail::ImapAccountBase::handleJobError (this=0x62dba0, job=0x1847910, context=@0x7fff348f1580, abortSync=false)
    at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/imapaccountbase.cpp:374
#18 0x00007f7f7e54943d in KMail::ImapAccountBase::handlePutError (this=0x62dba0, job=0x1847910, jd=<value optimized out>, folder=0xed9650)
    at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/imapaccountbase.cpp:966
#19 0x00007f7f7e64cf5e in KMail::CachedImapJob::slotPutMessageResult (this=0x1a5fc10, job=0x1847910) at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98/kmail/cachedimapjob.cpp:483
#20 0x00007f7f7e64e864 in KMail::CachedImapJob::qt_metacall (this=0x1a5fc10, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff348f17b0)
    at /var/tmp/portage/kde-base/kmail-4.2.98/work/kmail-4.2.98_build/kmail/cachedimapjob.moc:108
#21 0x00007f7f93294dfd in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#22 0x00007f7f936464e2 in KJob::result (this=0x4694, _t1=0x1847910) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98_build/kdecore/kjob.moc:188
#23 0x00007f7f936468e3 in KJob::emitResult (this=0x1847910) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kdecore/jobs/kjob.cpp:304
#24 0x00007f7f91646d6a in KIO::SimpleJob::slotFinished (this=0x1847910) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/job.cpp:477
#25 0x00007f7f9164718b in KIO::TransferJob::slotFinished (this=0x1847910) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/job.cpp:948
#26 0x00007f7f91644e77 in KIO::SimpleJob::slotError (this=0x1847910, err=149, errorText=@0x7fff348f1e30) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/job.cpp:489
#27 0x00007f7f916467f4 in KIO::SimpleJob::qt_metacall (this=0x1847910, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff348f1c70)
    at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98_build/kio/jobclasses.moc:158
#28 0x00007f7f9164d205 in KIO::TransferJob::qt_metacall (this=0x4694, _c=18068, _id=6, _a=0xffffffffffffffff)
    at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98_build/kio/jobclasses.moc:331
#29 0x00007f7f93294dfd in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#30 0x00007f7f916e2b76 in KIO::SlaveInterface::error (this=0x4694, _t1=149, _t2=<value optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98_build/kio/slaveinterface.moc:153
#31 0x00007f7f916e495b in KIO::SlaveInterface::dispatch (this=0x1db9450, _cmd=<value optimized out>, rawdata=<value optimized out>)
    at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/slaveinterface.cpp:208
#32 0x00007f7f916e4bd3 in KIO::SlaveInterface::dispatch (this=0x1db9450) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/slaveinterface.cpp:91
#33 0x00007f7f916d9b1a in KIO::Slave::gotInput (this=0x1db9450) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/slave.cpp:322
#34 0x00007f7f916dac08 in KIO::Slave::qt_metacall (this=0x1db9450, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fff348f2000)
    at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98_build/kio/slave.moc:76
#35 0x00007f7f93294dfd in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#36 0x00007f7f9161f96b in KIO::ConnectionPrivate::dequeue (this=0x1d794f0) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/connection.cpp:82
#37 0x00007f7f916206fa in KIO::Connection::qt_metacall (this=0x1d79570, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x27781f0)
    at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98_build/kio/connection.moc:73
#38 0x00007f7f93291991 in QObject::event () from /usr/lib64/qt4/libQtCore.so.4
#39 0x00007f7f93b5ac2d in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#40 0x00007f7f93b6264a in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#41 0x00007f7f94695bf1 in KApplication::notify (this=0x7fff348f2a40, receiver=0x1d79570, event=0x16d1980)
    at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kdeui/kernel/kapplication.cpp:302
#42 0x00007f7f93282cfb in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#43 0x00007f7f9328363e in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib64/qt4/libQtCore.so.4
#44 0x00007f7f932a8203 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#45 0x00007f7f8cccfdd9 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#46 0x00007f7f8ccd3528 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#47 0x00007f7f8ccd36ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#48 0x00007f7f932a7e9f in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#49 0x00007f7f93be109f in QGuiEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtGui.so.4
#50 0x00007f7f932816a2 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#51 0x00007f7f9328183c in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4
#52 0x00007f7f932838dc in QCoreApplication::exec () from /usr/lib64/qt4/libQtCore.so.4
#53 0x0000000000403f05 in main (argc=1, argv=0x7fff348f2f58) at /var/tmp/portage/kde-base/kontact-4.2.98/work/kontact-4.2.98/kontact/src/main.cpp:218

Reported using DrKonqi