Application: kontact (4.13.3)
KDE Platform Version: 4.13.3
Qt Version: 4.8.6
Operating System: Linux 3.13.0-36-generic x86_64
Distribution: Ubuntu 14.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:

Clicking on "Settings" > "configure filters.."

I removed Kmail with "purge" and reinstalled it. 
The error happens also when I remove all email accounts.

The crash can be reproduced every time.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc5c35b6800 (LWP 13595))]

Thread 6 (Thread 0x7fc5a2be3700 (LWP 13596)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fc5be35b81d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fc5be35b859 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fc5baa7d182 in start_thread (arg=0x7fc5a2be3700) at pthread_create.c:312
#4  0x00007fc5c0b2efbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7fc5622e0700 (LWP 13597)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fc5be09c20d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fc5be38afd6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fc5baa7d182 in start_thread (arg=0x7fc5622e0700) at pthread_create.c:312
#4  0x00007fc5c0b2efbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fc552967700 (LWP 13603)):
#0  0x00007fffa94b38bd in ?? ()
#1  0x00007fc552966b70 in ?? ()
#2  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fc54bfff700 (LWP 13612)):
#0  pthread_mutex_lock (mutex=0x7fc544000a60) at forward.c:192
#1  0x00007fc5ba5df991 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc5ba59d699 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc5ba59df03 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc5ba59e0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc5c12a87be in QEventDispatcherGlib::processEvents (this=0x7fc5440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007fc5c127a0af in QEventLoop::processEvents (this=this@entry=0x7fc54bffeda0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fc5c127a3a5 in QEventLoop::exec (this=this@entry=0x7fc54bffeda0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fc5c1176c5f in QThread::exec (this=this@entry=0x39b7f30) at thread/qthread.cpp:537
#9  0x00007fc5c125b823 in QInotifyFileSystemWatcherEngine::run (this=0x39b7f30) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007fc5c117932f in QThreadPrivate::start (arg=0x39b7f30) at thread/qthread_unix.cpp:349
#11 0x00007fc5baa7d182 in start_thread (arg=0x7fc54bfff700) at pthread_create.c:312
#12 0x00007fc5c0b2efbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fc542c99700 (LWP 14136)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fc559019ffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fc55901a039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fc5baa7d182 in start_thread (arg=0x7fc542c99700) at pthread_create.c:312
#4  0x00007fc5c0b2efbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fc5c35b6800 (LWP 13595)):
[KCrash Handler]
#6  shared_ptr (this=0x7fffa942ac00) at /usr/include/boost/smart_ptr/shared_ptr.hpp:328
#7  MailCommon::SearchRuleWidgetLister::setRuleList (this=0x5458d60, aList=aList@entry=0x5750228) at ../../mailcommon/search/searchpatternedit.cpp:482
#8  0x00007fc557d16765 in MailCommon::SearchPatternEdit::setSearchPattern (this=0x4fa1430, aPattern=0x5750228) at ../../mailcommon/search/searchpatternedit.cpp:684
#9  0x00007fc557d7b394 in MailCommon::KMFilterDialog::slotFilterSelected (this=0x5d48dd0, aFilter=0x5750220) at ../../mailcommon/filter/kmfilterdialog.cpp:736
#10 0x00007fc5c128f87a in QMetaObject::activate (sender=sender@entry=0x541b770, m=m@entry=0x7fc557fead00 <MailCommon::KMFilterListBox::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffa942ae00) at kernel/qobject.cpp:3539
#11 0x00007fc557d9175f in MailCommon::KMFilterListBox::filterSelected (this=this@entry=0x541b770, _t1=0x5750220) at moc_kmfilterdialog.cpp:155
#12 0x00007fc557d762f8 in MailCommon::KMFilterListBox::slotSelected (this=0x541b770, aIdx=0) at ../../mailcommon/filter/kmfilterdialog.cpp:1234
#13 0x00007fc5c128f87a in QMetaObject::activate (sender=sender@entry=0x543f790, m=m@entry=0x7fc5c2735780 <QListWidget::staticMetaObject>, local_signal_index=local_signal_index@entry=8, argv=argv@entry=0x7fffa942af50) at kernel/qobject.cpp:3539
#14 0x00007fc5c21c7c31 in QListWidget::currentRowChanged (this=this@entry=0x543f790, _t1=0) at .moc/release-shared/moc_qlistwidget.cpp:260
#15 0x00007fc5c21c7d2f in QListWidgetPrivate::_q_emitCurrentItemChanged (this=<optimized out>, current=..., previous=...) at itemviews/qlistwidget.cpp:1121
#16 0x00007fc5c128f87a in QMetaObject::activate (sender=sender@entry=0x5911930, m=m@entry=0x7fc5c2734fc0 <QItemSelectionModel::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fffa942b0e0) at kernel/qobject.cpp:3539
#17 0x00007fc5c21b688a in QItemSelectionModel::currentChanged (this=this@entry=0x5911930, _t1=..., _t2=...) at .moc/release-shared/moc_qitemselectionmodel.cpp:172
#18 0x00007fc5c21b696d in QItemSelectionModel::setCurrentIndex (this=0x5911930, index=..., command=...) at itemviews/qitemselectionmodel.cpp:1175
#19 0x00007fc5c21c7178 in QListWidget::setCurrentRow (this=0x543f790, row=row@entry=0) at itemviews/qlistwidget.cpp:1488
#20 0x00007fc557d76564 in MailCommon::KMFilterListBox::loadFilterList (this=0x541b770, createDummyFilter=createDummyFilter@entry=true) at ../../mailcommon/filter/kmfilterdialog.cpp:1611
#21 0x00007fc557d7a401 in MailCommon::KMFilterDialog::KMFilterDialog (this=0x5d48dd0, actionCollection=..., parent=<optimized out>, createDummyFilter=<optimized out>) at ../../mailcommon/filter/kmfilterdialog.cpp:616
#22 0x00007fc558096c26 in KMKernel::openFilterDialog (this=0x18c7940, createDummyFilter=<optimized out>) at ../../kmail/kmkernel.cpp:1880
#23 0x00007fc5581a553a in KMMainWidget::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at moc_kmmainwidget.cpp:416
#24 0x00007fc5c128f87a in QMetaObject::activate (sender=sender@entry=0x1bff400, m=m@entry=0x7fc5c2717de0 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fffa942bac0) at kernel/qobject.cpp:3539
#25 0x00007fc5c1c67a62 in QAction::triggered (this=this@entry=0x1bff400, _t1=false) at .moc/release-shared/moc_qaction.cpp:276
#26 0x00007fc5c1c69433 in QAction::activate (this=this@entry=0x1bff400, event=event@entry=QAction::Trigger) at kernel/qaction.cpp:1257
#27 0x00007fc5c2097489 in QMenuPrivate::activateCausedStack (this=this@entry=0x14a5570, causedStack=..., action=action@entry=0x1bff400, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1038
#28 0x00007fc5c209b9b9 in QMenuPrivate::activateAction (this=0x14a5570, action=0x1bff400, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1130
#29 0x00007fc5c209f385 in QMenu::mouseReleaseEvent (this=this@entry=0x149fc70, e=e@entry=0x7fffa942c1f0) at widgets/qmenu.cpp:2372
#30 0x00007fc5c2a2f665 in KMenu::mouseReleaseEvent (this=0x149fc70, e=0x7fffa942c1f0) at ../../kdeui/widgets/kmenu.cpp:464
#31 0x00007fc5c1cbd50a in QWidget::event (this=this@entry=0x149fc70, event=event@entry=0x7fffa942c1f0) at kernel/qwidget.cpp:8376
#32 0x00007fc5c209f7bb in QMenu::event (this=0x149fc70, e=0x7fffa942c1f0) at widgets/qmenu.cpp:2481
#33 0x00007fc5c1c6de2c in QApplicationPrivate::notify_helper (this=this@entry=0x11e2cd0, receiver=receiver@entry=0x149fc70, e=e@entry=0x7fffa942c1f0) at kernel/qapplication.cpp:4567
#34 0x00007fc5c1c745dd in QApplication::notify (this=this@entry=0x7fffa942ca10, receiver=receiver@entry=0x149fc70, e=e@entry=0x7fffa942c1f0) at kernel/qapplication.cpp:4110
#35 0x00007fc5c2978d1a in KApplication::notify (this=0x7fffa942ca10, receiver=0x149fc70, event=0x7fffa942c1f0) at ../../kdeui/kernel/kapplication.cpp:311
#36 0x00007fc5c127b4dd in QCoreApplication::notifyInternal (this=0x7fffa942ca10, receiver=receiver@entry=0x149fc70, event=event@entry=0x7fffa942c1f0) at kernel/qcoreapplication.cpp:953
#37 0x00007fc5c1c73d93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#38 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x149fc70, event=event@entry=0x7fffa942c1f0, alienWidget=alienWidget@entry=0x0, nativeWidget=nativeWidget@entry=0x149fc70, buttonDown=buttonDown@entry=0x7fc5c2753318 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#39 0x00007fc5c1ce8cfc in QETWidget::translateMouseEvent (this=this@entry=0x149fc70, event=event@entry=0x7fffa942c540) at kernel/qapplication_x11.cpp:4568
#40 0x00007fc5c1ce8269 in QApplication::x11ProcessEvent (this=0x7fffa942ca10, event=event@entry=0x7fffa942c540) at kernel/qapplication_x11.cpp:3627
#41 0x00007fc5c1d0fb02 in x11EventSourceDispatch (s=0x11e34d0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#42 0x00007fc5ba59de04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007fc5ba59e048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007fc5ba59e0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007fc5c12a87a1 in QEventDispatcherGlib::processEvents (this=0x11d95e0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#46 0x00007fc5c1d0fbb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#47 0x00007fc5c127a0af in QEventLoop::processEvents (this=this@entry=0x7fffa942c910, flags=...) at kernel/qeventloop.cpp:149
#48 0x00007fc5c127a3a5 in QEventLoop::exec (this=this@entry=0x7fffa942c910, flags=...) at kernel/qeventloop.cpp:204
#49 0x00007fc5c127fb79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#50 0x00007fc5c1c6c37c in QApplication::exec () at kernel/qapplication.cpp:3828
#51 0x0000000000403660 in main (argc=1, argv=0x7fffa942cb58) at ../../../kontact/src/main.cpp:219

Reported using DrKonqi