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 i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Kmail crashes when sending or receiving email. Not every time, rather randomly. I don't know how to reproduce. I haven't tried yet to run kmail standalone, only in kontact.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[Current thread is 0 (LWP 9208)]

Thread 2 (Thread 0xac574b90 (LWP 9839)):
#0  0xb7ee3430 in __kernel_vsyscall ()
#1  0xb500d0e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb58862ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb5a6a172 in QWaitCondition::wait (this=0xaeb3d40, mutex=0xaeb3d3c, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0xb6966ac2 in QHostInfoAgent::run (this=0xaeb3d30) at kernel/qhostinfo.cpp:260
#5  0xb5a69132 in QThreadPrivate::start (arg=0xaeb3d30) at thread/qthread_unix.cpp:188
#6  0xb50094ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb587749e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb4777700 (LWP 9208)):
[KCrash Handler]
#6  KMail::FolderJob::msgList (this=0x2d0072) at /usr/include/qt4/QtCore/qlist.h:111
#7  0xb0c4140f in FolderStorage::ignoreJobsForMessage (this=0x9def328, msg=0xb2aaa78) at /build/buildd/kdepim-4.3.1/kmail/folderstorage.cpp:1113
#8  0xb0c400e3 in FolderStorage::unGetMsg (this=0x9def328, idx=0) at /build/buildd/kdepim-4.3.1/kmail/folderstorage.cpp:569
#9  0xb0c0cceb in KMFolder::unGetMsg (this=0x9de6730, idx=0) at /build/buildd/kdepim-4.3.1/kmail/kmfolder.cpp:373
#10 0xb0c8e6b4 in KMSearchPattern::matches (this=0xaf07a60, serNum=39994, ignoreBody=false) at /build/buildd/kdepim-4.3.1/kmail/kmsearchpattern.cpp:796
#11 0xb0c3fa80 in FolderStorage::slotProcessNextSearchBatch (this=0x9def328) at /build/buildd/kdepim-4.3.1/kmail/folderstorage.cpp:1180
#12 0xb0e49654 in KMSearch::slotProcessNextBatch (this=0xaf27118) at /build/buildd/kdepim-4.3.1/kmail/kmfoldersearch.cpp:272
#13 0xb0e497cb in KMSearch::qt_metacall (this=0xaf27118, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbf9000b8) at /build/buildd/kdepim-4.3.1/obj-i486-linux-gnu/kmail/kmfoldersearch.moc:79
#14 0xb5b731b8 in QMetaObject::activate (sender=0x9db2398, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#15 0xb5b73e42 in QMetaObject::activate (sender=0x9db2398, m=0xb5c50904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#16 0xb5baf687 in QTimer::timeout (this=0x9db2398) at .moc/release-shared/moc_qtimer.cpp:128
#17 0xb5b795ce in QTimer::timerEvent (this=0x9db2398, e=0xbf90053c) at kernel/qtimer.cpp:261
#18 0xb5b6e16f in QObject::event (this=0x9db2398, e=0xbf90053c) at kernel/qobject.cpp:1075
#19 0xb6020d3c in QApplicationPrivate::notify_helper (this=0x9864418, receiver=0x9db2398, e=0xbf90053c) at kernel/qapplication.cpp:4056
#20 0xb602903e in QApplication::notify (this=0xbf9007e8, receiver=0x9db2398, e=0xbf90053c) at kernel/qapplication.cpp:3603
#21 0xb6c1a85d in KApplication::notify (this=0xbf9007e8, receiver=0x9db2398, event=0xbf90053c) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#22 0xb5b5dbcb in QCoreApplication::notifyInternal (this=0xbf9007e8, receiver=0x9db2398, event=0xbf90053c) at kernel/qcoreapplication.cpp:610
#23 0xb5b8cd51 in QTimerInfoList::activateTimers (this=0x98663b4) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#24 0xb5b893a0 in timerSourceDispatch (source=0x9866380) at kernel/qeventdispatcher_glib.cpp:165
#25 0xb4c2eb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#26 0xb4c320eb in ?? () from /usr/lib/libglib-2.0.so.0
#27 0xb4c32268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#28 0xb5b892f8 in QEventDispatcherGlib::processEvents (this=0x9845028, flags={i = -1081080136}) at kernel/qeventdispatcher_glib.cpp:327
#29 0xb60c2a75 in QGuiEventDispatcherGlib::processEvents (this=0x9845028, flags={i = -1081080088}) at kernel/qguieventdispatcher_glib.cpp:202
#30 0xb5b5c1fa in QEventLoop::processEvents (this=0xbf900760, flags={i = -1081080024}) at kernel/qeventloop.cpp:149
#31 0xb5b5c642 in QEventLoop::exec (this=0xbf900760, flags={i = -1081079960}) at kernel/qeventloop.cpp:201
#32 0xb5b5eae9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0xb6020bb7 in QApplication::exec () at kernel/qapplication.cpp:3525
#34 0x0804bfef in main (argc=1, argv=0xbf900ae4) at /build/buildd/kdepim-4.3.1/kontact/src/main.cpp:218

This bug may be a duplicate of or related to bug 205451

Reported using DrKonqi