Application: kontact (4.13.1)
KDE Platform Version: 4.13.1
Qt Version: 4.8.6
Operating System: Linux 3.13.0-24-generic i686
Distribution: Ubuntu 14.04 LTS

-- Information about the crash:
- What I was doing when the application crashed: I was trying to get the KNotes alarm to work. I went to Popup Notes in the sidebar, selected Settings > Preferences Knotes > Collections, and right-clicked on one of teh collections to delete (couldn't), then deselected it and chose the other collection. Then I clicked on another preference on the sidebar and the software crashed. Happens sometimes.

Other possibly irrelevant notes: The alarm function of KNotes doesn't work - no popup note appears. I cannot get a popup not to appear on my desktop. I had installed KJots, but uninstalled it. It let me create and delete collections, while I could not figure out how to do that in KNotes.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb145c740 (LWP 2679))]

Thread 6 (Thread 0xae839b40 (LWP 2680)):
#0  0xb778c424 in __kernel_vsyscall ()
#1  0xb320fd4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb611a8ec in __pthread_cond_wait (cond=0xb5869cb0, mutex=0xb5869c98) at forward.c:149
#3  0xb4ff19ac in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0xb4ff19ff in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0xb320bf70 in start_thread (arg=0xae839b40) at pthread_create.c:312
#6  0xb610d70e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 5 (Thread 0xadf18b40 (LWP 2681)):
#0  0xb778c424 in __kernel_vsyscall ()
#1  0xb320fd4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb611a8ec in __pthread_cond_wait (cond=0xadf867dc, mutex=0xadf867c4) at forward.c:149
#3  0xb50209f3 in WTF::ThreadCondition::wait(WTF::Mutex&) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0xb4cfc574 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0xb50077c6 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#6  0xb5020369 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#7  0xb320bf70 in start_thread (arg=0xadf18b40) at pthread_create.c:312
#8  0xb610d70e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 4 (Thread 0xab375b40 (LWP 2689)):
#0  0xb778c424 in __kernel_vsyscall ()
#1  0xb60fe7ab in poll () at ../sysdeps/unix/syscall-template.S:81
#2  0xb313520b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb31263e8 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb3126528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb646295f in QEventDispatcherGlib::processEvents (this=0xaa900468, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0xb6431823 in QEventLoop::processEvents (this=this@entry=0xab375288, flags=...) at kernel/qeventloop.cpp:149
#7  0xb6431b49 in QEventLoop::exec (this=this@entry=0xab375288, flags=...) at kernel/qeventloop.cpp:204
#8  0xb631e23d in QThread::exec (this=this@entry=0x9bc6b00) at thread/qthread.cpp:537
#9  0xb631e38b in QThread::run (this=0x9bc6b00) at thread/qthread.cpp:604
#10 0xb6320b6f in QThreadPrivate::start (arg=0x9bc6b00) at thread/qthread_unix.cpp:349
#11 0xb320bf70 in start_thread (arg=0xab375b40) at pthread_create.c:312
#12 0xb610d70e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 3 (Thread 0xaa28bb40 (LWP 2696)):
#0  0xb320f12e in __pthread_mutex_unlock_usercnt (mutex=0xa9900558, decr=1) at pthread_mutex_unlock.c:57
#1  0xb611ab34 in pthread_mutex_unlock (mutex=0xa9900558) at forward.c:194
#2  0xb316b140 in g_mutex_unlock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb3126532 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb646295f in QEventDispatcherGlib::processEvents (this=0xa9900468, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#5  0xb6431823 in QEventLoop::processEvents (this=this@entry=0xaa28b258, flags=...) at kernel/qeventloop.cpp:149
#6  0xb6431b49 in QEventLoop::exec (this=this@entry=0xaa28b258, flags=...) at kernel/qeventloop.cpp:204
#7  0xb631e23d in QThread::exec (this=this@entry=0xa111568) at thread/qthread.cpp:537
#8  0xb6411c44 in QInotifyFileSystemWatcherEngine::run (this=0xa111568) at io/qfilesystemwatcher_inotify.cpp:265
#9  0xb6320b6f in QThreadPrivate::start (arg=0xa111568) at thread/qthread_unix.cpp:349
#10 0xb320bf70 in start_thread (arg=0xaa28bb40) at pthread_create.c:312
#11 0xb610d70e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 2 (Thread 0xa98ffb40 (LWP 2697)):
#0  0xb778c424 in __kernel_vsyscall ()
#1  0xb320fd4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb611a8ec in __pthread_cond_wait (cond=0xac5158d0, mutex=0xac5158b8) at forward.c:149
#3  0xac412c92 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xac412cdf in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb320bf70 in start_thread (arg=0xa98ffb40) at pthread_create.c:312
#6  0xb610d70e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 1 (Thread 0xb145c740 (LWP 2679)):
[KCrash Handler]
#7  0xb6a5c66d in QImage::QImage (this=0xbfb47254, image=...) at image/qimage.cpp:1094
#8  0xb6a86455 in QRasterPixmapData::fromImage (this=0xaed2320, sourceImage=..., flags=<error reading variable: Cannot access memory at address 0x0>) at image/qpixmap_raster.cpp:155
#9  0xaca0699c in KNotesPart::slotItemRemoved (this=this@entry=0xa0ef3f0, item=...) at ../../../../kontact/plugins/knotes/knotes_part.cpp:258
#10 0xaca1f3ed in KNotesPart::qt_static_metacall (_o=_o@entry=0xa0ef3f0, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=27, _a=0xbfb47398) at moc_knotes_part.cpp:130
#11 0xb64480f7 in QMetaObject::activate (sender=sender@entry=0xa0f78f8, m=m@entry=0xb5c7b218 <Akonadi::Monitor::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0xbfb47398) at kernel/qobject.cpp:3539
#12 0xb5b1bde5 in Akonadi::Monitor::itemRemoved (this=0xa0f78f8, _t1=...) at ./moc_monitor.cpp:273
#13 0xb5b25cf4 in Akonadi::MonitorPrivate::emitItemsNotification (this=0xa0f7908, msg=..., items=..., collection=..., collectionDest=...) at ../../akonadi/monitor_p.cpp:847
#14 0xb5b27240 in Akonadi::MonitorPrivate::emitNotification (this=0xa0f7908, msg=...) at ../../akonadi/monitor_p.cpp:501
#15 0xb5b22d64 in Akonadi::MonitorPrivate::dispatchNotifications (this=this@entry=0xa0f7908) at ../../akonadi/monitor_p.cpp:725
#16 0xb5b23ea2 in Akonadi::MonitorPrivate::slotNotify (this=this@entry=0xa0f7908, msgs=...) at ../../akonadi/monitor_p.cpp:695
#17 0xb5a70f46 in Akonadi::ChangeRecorderPrivate::slotNotify (this=0xa0f7908, msgs=...) at ../../akonadi/changerecorder_p.cpp:52
#18 0xb5b1c76a in Akonadi::Monitor::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=0xbfb47748, _c=<optimized out>) at ./moc_monitor.cpp:177
#19 0xb64480f7 in QMetaObject::activate (sender=sender@entry=0xa0f6f30, m=m@entry=0xb5c7f814 <Akonadi::NotificationSource::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0xbfb47748) at kernel/qobject.cpp:3539
#20 0xb5be26c1 in notifyV3 (_t1=..., this=this@entry=0xa0f6f30) at moc_notificationsource_p.cpp:98
#21 Akonadi::NotificationSource::qt_static_metacall (_o=_o@entry=0xa0f6f30, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfb47864) at moc_notificationsource_p.cpp:49
#22 0xb64480f7 in QMetaObject::activate (sender=sender@entry=0xa0f7d38, m=m@entry=0xb5c7d318 <OrgFreedesktopAkonadiNotificationSourceInterface::staticMetaObject>, local_signal_index=10, argv=0xbfb47864) at kernel/qobject.cpp:3539
#23 0xb5bd8f95 in isAllMonitoredChanged (this=<optimized out>) at notificationsourceinterface.moc:207
#24 OrgFreedesktopAkonadiNotificationSourceInterface::qt_static_metacall (_o=_o@entry=0xa0f7d38, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=10, _a=_a@entry=0xbfb4798c) at notificationsourceinterface.moc:110
#25 0xb5bda2ac in OrgFreedesktopAkonadiNotificationSourceInterface::qt_metacall (this=0xa0f7d38, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0xbfb4798c) at notificationsourceinterface.moc:192
#26 0xb5ca221e in QDBusConnectionPrivate::deliverCall (this=0x9a26fc8, object=object@entry=0xa0f7d38, msg=..., metaTypes=..., slotIdx=15) at qdbusintegrator.cpp:951
#27 0xb5cab2cd in QDBusCallDeliveryEvent::placeMetaCall (this=0xa6ca6f8, object=0xa0f7d38) at qdbusintegrator_p.h:103
#28 0xb644c6fb in QObject::event (this=0xa0f7d38, e=0xa6ca6f8) at kernel/qobject.cpp:1194
#29 0xb698e7f4 in QApplicationPrivate::notify_helper (this=0x9a401d8, receiver=0xa0f7d38, e=0xa6ca6f8) at kernel/qapplication.cpp:4567
#30 0xb69952d3 in QApplication::notify (this=0xbfb48008, receiver=receiver@entry=0xa0f7d38, e=e@entry=0xa6ca6f8) at kernel/qapplication.cpp:4353
#31 0xb74de1f4 in KApplication::notify (this=0xbfb48008, receiver=0xa0f7d38, event=0xa6ca6f8) at ../../kdeui/kernel/kapplication.cpp:311
#32 0xb6432e4a in QCoreApplication::notifyInternal (this=0xbfb48008, receiver=receiver@entry=0xa0f7d38, event=event@entry=0xa6ca6f8) at kernel/qcoreapplication.cpp:953
#33 0xb643670d in sendEvent (event=0xa6ca6f8, receiver=0xa0f7d38) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#34 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x9a0c010) at kernel/qcoreapplication.cpp:1577
#35 0xb6436c1c in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#36 0xb646323e in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#37 postEventSourceDispatch (s=0x9a402d8) at kernel/qeventdispatcher_glib.cpp:287
#38 0xb31261e3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#39 0xb3126468 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#40 0xb3126528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#41 0xb646293b in QEventDispatcherGlib::processEvents (this=this@entry=0x9a0cd98, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#42 0xb6a435de in QGuiEventDispatcherGlib::processEvents (this=0x9a0cd98, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#43 0xb6431823 in QEventLoop::processEvents (this=this@entry=0xbfb47f58, flags=...) at kernel/qeventloop.cpp:149
#44 0xb6431b49 in QEventLoop::exec (this=this@entry=0xbfb47f58, flags=...) at kernel/qeventloop.cpp:204
#45 0xb64378fe in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#46 0xb698ca24 in QApplication::exec () at kernel/qapplication.cpp:3828
#47 0x0804ab4c in main (argc=1, argv=0xbfb480e4) at ../../../kontact/src/main.cpp:219

Reported using DrKonqi