Application: kmail (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.4
Operating System: Linux 3.11.0-8-generic x86_64
Distribution: Ubuntu Saucy Salamander (development branch)

-- Information about the crash:
Kcontact crashed during changing settings.
It was mentioned that a file was missing.
(did not update today yet)

The crash can be reproduced sometimes.

-- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7d92ae1800 (LWP 2134))]

Thread 6 (Thread 0x7f7d6cfd0700 (LWP 2274)):
#0  0x00007f7d8fe49bbd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7d87fb7660 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7d87f781bc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7d87f7862b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7d87f7879c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7d91498a76 in QEventDispatcherGlib::processEvents (this=0x7f7d680008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f7d9146a5ef in QEventLoop::processEvents (this=this@entry=0x7f7d6cfcfd30, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f7d9146a8e5 in QEventLoop::exec (this=this@entry=0x7f7d6cfcfd30, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f7d9136988f in QThread::exec (this=this@entry=0x117ebc0) at thread/qthread.cpp:542
#9  0x00007f7d9144bd13 in QInotifyFileSystemWatcherEngine::run (this=0x117ebc0) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007f7d9136bf2f in QThreadPrivate::start (arg=0x117ebc0) at thread/qthread_unix.cpp:338
#11 0x00007f7d8d71af6e in start_thread (arg=0x7f7d6cfd0700) at pthread_create.c:311
#12 0x00007f7d8fe57ecd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7f7d667cd700 (LWP 2295)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7d847b183d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f7d847b1879 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f7d8d71af6e in start_thread (arg=0x7f7d667cd700) at pthread_create.c:311
#4  0x00007f7d8fe57ecd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f7d2573b700 (LWP 2299)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7d844f35ad in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f7d847e1096 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f7d8d71af6e in start_thread (arg=0x7f7d2573b700) at pthread_create.c:311
#4  0x00007f7d8fe57ecd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f7d24ae8700 (LWP 2311)):
#0  0x00007f7d87fb80da in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7d87fb83b9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7d87f77d30 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7d87f785b3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7d87f7879c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7d91498a76 in QEventDispatcherGlib::processEvents (this=0x7f7d180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f7d9146a5ef in QEventLoop::processEvents (this=this@entry=0x7f7d24ae7d70, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f7d9146a8e5 in QEventLoop::exec (this=this@entry=0x7f7d24ae7d70, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f7d9136988f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007f7d9136bf2f in QThreadPrivate::start (arg=0x169cd20) at thread/qthread_unix.cpp:338
#10 0x00007f7d8d71af6e in start_thread (arg=0x7f7d24ae8700) at pthread_create.c:311
#11 0x00007f7d8fe57ecd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f7d1d532700 (LWP 2398)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7d7ba1906b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f7d7ba190a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f7d8d71af6e in start_thread (arg=0x7f7d1d532700) at pthread_create.c:311
#4  0x00007f7d8fe57ecd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f7d92ae1800 (LWP 2134)):
[KCrash Handler]
#6  0x00007f7d8bcc858f in MessageList::Core::Manager::defaultAggregation (this=0x0) at ../../messagelist/core/manager.cpp:217
#7  0x00007f7d8bd09663 in MessageList::Utils::AggregationComboBox::selectDefault (this=0x226f2a0) at ../../messagelist/utils/aggregationcombobox.cpp:102
#8  0x00007f7d9187a054 in slotSelectDefaultAggregation (this=0x226d860) at ../../kmail/configuredialog/configuredialog.cpp:1447
#9  AppearancePageHeadersTab::doLoadFromGlobalSettings (this=0x226d860) at ../../kmail/configuredialog/configuredialog.cpp:1491
#10 0x00007f7d9189cfb1 in load (this=0x226d860) at ../../kmail/configuredialog/configuredialog_p.cpp:95
#11 ConfigModuleWithTabs::load (this=0x20e6500) at ../../kmail/configuredialog/configuredialog_p.cpp:66
#12 0x00007f7d9258e9c9 in KCModule::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at ./kcmodule.moc:66
#13 0x00007f7d91483dce in QObject::event (this=this@entry=0x20e6500, e=e@entry=0x15cea40) at kernel/qobject.cpp:1194
#14 0x00007f7d9085836b in QWidget::event (this=0x20e6500, event=0x15cea40) at kernel/qwidget.cpp:8845
#15 0x00007f7d90808dfc in QApplicationPrivate::notify_helper (this=this@entry=0xc8d060, receiver=receiver@entry=0x20e6500, e=e@entry=0x15cea40) at kernel/qapplication.cpp:4567
#16 0x00007f7d9080f470 in QApplication::notify (this=this@entry=0x7fff4e5c9300, receiver=receiver@entry=0x20e6500, e=e@entry=0x15cea40) at kernel/qapplication.cpp:4353
#17 0x00007f7d92501a9a in KApplication::notify (this=0x7fff4e5c9300, receiver=0x20e6500, event=0x15cea40) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007f7d9146b8bd in QCoreApplication::notifyInternal (this=0x7fff4e5c9300, receiver=receiver@entry=0x20e6500, event=event@entry=0x15cea40) at kernel/qcoreapplication.cpp:946
#19 0x00007f7d9146ee1f in sendEvent (event=0x15cea40, receiver=0x20e6500) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#20 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xc23220) at kernel/qcoreapplication.cpp:1570
#21 0x00007f7d9146f2c3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#22 0x00007f7d91499073 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#23 postEventSourceDispatch (s=0xc9b320) at kernel/qeventdispatcher_glib.cpp:279
#24 0x00007f7d87f783a6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f7d87f786f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f7d87f7879c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f7d91498a55 in QEventDispatcherGlib::processEvents (this=0xc24b00, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#28 0x00007f7d908aa9d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#29 0x00007f7d9146a5ef in QEventLoop::processEvents (this=this@entry=0x7fff4e5c8f50, flags=...) at kernel/qeventloop.cpp:149
#30 0x00007f7d9146a8e5 in QEventLoop::exec (this=this@entry=0x7fff4e5c8f50, flags=...) at kernel/qeventloop.cpp:204
#31 0x00007f7d9146fe5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#32 0x00007f7d9080734c in QApplication::exec () at kernel/qapplication.cpp:3828
#33 0x0000000000402d3a in main (argc=<optimized out>, argv=<optimized out>) at ../../kmail/main.cpp:146

Reported using DrKonqi