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:
I had two collections selected in KNotes. One was supposed to be the default collections. I created a note, which appeared twice. Edited one note - entered message. When I edited the second note with a different message, I got a dialogue box asking me to compare and choose one. I selected one, then deleted the other. Went to KNotes Settings, collections, and unselected the not default collection. Kontact crashed.

Other notes - There is nothing in my .kde/share/apps/knotes directory except a print folder.

-- 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 0xb13f0740 (LWP 3197))]

Thread 6 (Thread 0xae7cdb40 (LWP 3198)):
#0  0xb7720424 in __kernel_vsyscall ()
#1  0xb31a3d4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb60ae8ec in __pthread_cond_wait (cond=0xb57fdcb0, mutex=0xb57fdc98) at forward.c:149
#3  0xb4f859ac in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0xb4f859ff in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0xb319ff70 in start_thread (arg=0xae7cdb40) at pthread_create.c:312
#6  0xb60a170e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 5 (Thread 0xadeacb40 (LWP 3199)):
#0  0xb7720424 in __kernel_vsyscall ()
#1  0xb31a3d4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb60ae8ec in __pthread_cond_wait (cond=0xadf1a7dc, mutex=0xadf1a7c4) at forward.c:149
#3  0xb4fb49f3 in WTF::ThreadCondition::wait(WTF::Mutex&) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0xb4c90574 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0xb4f9b7c6 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#6  0xb4fb4369 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#7  0xb319ff70 in start_thread (arg=0xadeacb40) at pthread_create.c:312
#8  0xb60a170e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 4 (Thread 0xab30db40 (LWP 3203)):
#0  0xb63f6def in testAndSetOrdered (newValue=0, expectedValue=1, this=0x92d0a28) at ../../include/QtCore/../../src/corelib/arch/qatomic_i386.h:144
#1  testAndSetRelease (newValue=0, expectedValue=1, this=0x92d0a28) at ../../include/QtCore/../../src/corelib/arch/qatomic_i386.h:271
#2  unlockInline (this=0x8d0f494) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:171
#3  unlock (this=<synthetic pointer>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:121
#4  ~QMutexLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:115
#5  canWaitLocked (this=<optimized out>) at ../../include/QtCore/private/../../../src/corelib/thread/qthread_p.h:229
#6  postEventSourcePrepare (s=0xaaa02800, timeout=0xab30d11c) at kernel/qeventdispatcher_glib.cpp:270
#7  0xb30b99b3 in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0xb30ba2df in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0xb30ba528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0xb63f695f in QEventDispatcherGlib::processEvents (this=0xaaa00468, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#11 0xb63c5823 in QEventLoop::processEvents (this=this@entry=0xab30d288, flags=...) at kernel/qeventloop.cpp:149
#12 0xb63c5b49 in QEventLoop::exec (this=this@entry=0xab30d288, flags=...) at kernel/qeventloop.cpp:204
#13 0xb62b223d in QThread::exec (this=this@entry=0x8d1d0f0) at thread/qthread.cpp:537
#14 0xb62b238b in QThread::run (this=0x8d1d0f0) at thread/qthread.cpp:604
#15 0xb62b4b6f in QThreadPrivate::start (arg=0x8d1d0f0) at thread/qthread_unix.cpp:349
#16 0xb319ff70 in start_thread (arg=0xab30db40) at pthread_create.c:312
#17 0xb60a170e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 3 (Thread 0xaa222b40 (LWP 3208)):
#0  0xb7720424 in __kernel_vsyscall ()
#1  0xb60927ab in poll () at ../sysdeps/unix/syscall-template.S:81
#2  0xb30c920b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb30ba3e8 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb30ba528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb63f695f in QEventDispatcherGlib::processEvents (this=0xa9900468, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0xb63c5823 in QEventLoop::processEvents (this=this@entry=0xaa222258, flags=...) at kernel/qeventloop.cpp:149
#7  0xb63c5b49 in QEventLoop::exec (this=this@entry=0xaa222258, flags=...) at kernel/qeventloop.cpp:204
#8  0xb62b223d in QThread::exec (this=this@entry=0x9259818) at thread/qthread.cpp:537
#9  0xb63a5c44 in QInotifyFileSystemWatcherEngine::run (this=0x9259818) at io/qfilesystemwatcher_inotify.cpp:265
#10 0xb62b4b6f in QThreadPrivate::start (arg=0x9259818) at thread/qthread_unix.cpp:349
#11 0xb319ff70 in start_thread (arg=0xaa222b40) at pthread_create.c:312
#12 0xb60a170e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 2 (Thread 0xa98ffb40 (LWP 3209)):
#0  0xb7720424 in __kernel_vsyscall ()
#1  0xb31a3d4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb60ae8ec in __pthread_cond_wait (cond=0xac4a98d0, mutex=0xac4a98b8) at forward.c:149
#3  0xac3a6c92 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xac3a6cdf in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb319ff70 in start_thread (arg=0xa98ffb40) at pthread_create.c:312
#6  0xb60a170e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 1 (Thread 0xb13f0740 (LWP 3197)):
[KCrash Handler]
#7  ref (this=0x2f007d) at /usr/include/qt4/QtCore/qatomic_i386.h:120
#8  QSharedDataPointer (o=..., this=0xbf8ad0fc) at /usr/include/qt4/QtCore/qshareddata.h:93
#9  assignEntityPrivate (one=..., other=...) at ../../akonadi/entity.cpp:49
#10 0xb59d3c66 in Akonadi::Entity::Entity (this=0xbf8ad190, other=...) at ../../akonadi/entity.cpp:55
#11 0xb5a8d493 in Akonadi::Item::Item (this=0xbf8ad190, other=...) at ../../akonadi/item.cpp:130
#12 0xac9abaa7 in KNotesIconViewItem::item (this=0x9664380) at ../../../../kontact/plugins/knotes/knotesiconview.cpp:263
#13 0xac9a74f5 in KNotesPart::slotCollectionChanged (this=this@entry=0x92ace98, col=..., set=...) at ../../../../kontact/plugins/knotes/knotes_part.cpp:807
#14 0xac9b339f in KNotesPart::qt_static_metacall (_o=_o@entry=0x92ace98, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=30, _a=0xbf8ad2c4) at moc_knotes_part.cpp:133
#15 0xb63dc0f7 in QMetaObject::activate (sender=sender@entry=0x92b5210, m=m@entry=0xb5c0f218 <Akonadi::Monitor::staticMetaObject>, local_signal_index=local_signal_index@entry=14, argv=argv@entry=0xbf8ad2c4) at kernel/qobject.cpp:3539
#16 0xb5ab00bd in Akonadi::Monitor::collectionChanged (this=0x92b5210, _t1=..., _t2=...) at ./moc_monitor.cpp:329
#17 0xb5aba4e6 in Akonadi::MonitorPrivate::emitCollectionNotification (this=0x92b5220, msg=..., col=..., par=..., dest=...) at ../../akonadi/monitor_p.cpp:926
#18 0xb5abb2de in Akonadi::MonitorPrivate::emitNotification (this=0x92b5220, msg=...) at ../../akonadi/monitor_p.cpp:494
#19 0xb5ab6bce in Akonadi::MonitorPrivate::flushPipeline (this=this@entry=0x92b5220) at ../../akonadi/monitor_p.cpp:706
#20 0xb5ab6da0 in Akonadi::MonitorPrivate::dataAvailable (this=0x92b5220) at ../../akonadi/monitor_p.cpp:715
#21 0xb5ab0753 in Akonadi::Monitor::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=0xbf8ad4e8, _c=<optimized out>) at ./moc_monitor.cpp:178
#22 0xb63dc0f7 in QMetaObject::activate (sender=sender@entry=0x92b4b00, m=m@entry=0xb5c0e0dc <Akonadi::EntityCacheBase::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#23 0xb5a54d25 in Akonadi::EntityCacheBase::dataAvailable (this=0x92b4b00) at ./moc_entitycache_p.cpp:101
#24 0xb5a0fc81 in Akonadi::EntityCache<Akonadi::Collection, Akonadi::CollectionFetchJob, Akonadi::CollectionFetchScope>::processResult (this=0x92b4b00, job=0x9ce4c98) at ../../akonadi/entitycache_p.h:213
#25 0xb5a54c63 in Akonadi::EntityCacheBase::qt_static_metacall (_o=_o@entry=0x92b4b00, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=1, _a=0xbf8ad688) at ./moc_entitycache_p.cpp:53
#26 0xb63dc0f7 in QMetaObject::activate (sender=sender@entry=0x9ce4c98, m=m@entry=0xb67e14cc <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0xbf8ad688) at kernel/qobject.cpp:3539
#27 0xb663cf95 in KJob::result (this=this@entry=0x9ce4c98, _t1=_t1@entry=0x9ce4c98) at ./kjob.moc:207
#28 0xb663cfe2 in KJob::emitResult (this=this@entry=0x9ce4c98) at ../../kdecore/jobs/kjob.cpp:318
#29 0xb5aabbe7 in Akonadi::JobPrivate::delayedEmitResult (this=0xa2b5340) at ../../akonadi/job.cpp:161
#30 0xb63d88aa in QMetaCallEvent::placeMetaCall (this=0xa4c5090, object=0x9ce4c98) at kernel/qobject.cpp:524
#31 0xb63e06fb in QObject::event (this=0x9ce4c98, e=0xa4c5090) at kernel/qobject.cpp:1194
#32 0xb69227f4 in QApplicationPrivate::notify_helper (this=0x8bf5388, receiver=0x9ce4c98, e=0xa4c5090) at kernel/qapplication.cpp:4567
#33 0xb69292d3 in QApplication::notify (this=0xbf8adcf8, receiver=receiver@entry=0x9ce4c98, e=e@entry=0xa4c5090) at kernel/qapplication.cpp:4353
#34 0xb74721f4 in KApplication::notify (this=0xbf8adcf8, receiver=0x9ce4c98, event=0xa4c5090) at ../../kdeui/kernel/kapplication.cpp:311
#35 0xb63c6e4a in QCoreApplication::notifyInternal (this=0xbf8adcf8, receiver=receiver@entry=0x9ce4c98, event=event@entry=0xa4c5090) at kernel/qcoreapplication.cpp:953
#36 0xb63ca70d in sendEvent (event=0xa4c5090, receiver=0x9ce4c98) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#37 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x8bca010) at kernel/qcoreapplication.cpp:1577
#38 0xb63cac1c in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#39 0xb63f723e in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#40 postEventSourceDispatch (s=0x8bf5488) at kernel/qeventdispatcher_glib.cpp:287
#41 0xb30ba1e3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#42 0xb30ba468 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#43 0xb30ba528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#44 0xb63f693b in QEventDispatcherGlib::processEvents (this=this@entry=0x8bcad98, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#45 0xb69d75de in QGuiEventDispatcherGlib::processEvents (this=0x8bcad98, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#46 0xb63c5823 in QEventLoop::processEvents (this=this@entry=0xbf8adc48, flags=...) at kernel/qeventloop.cpp:149
#47 0xb63c5b49 in QEventLoop::exec (this=this@entry=0xbf8adc48, flags=...) at kernel/qeventloop.cpp:204
#48 0xb63cb8fe in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#49 0xb6920a24 in QApplication::exec () at kernel/qapplication.cpp:3828
#50 0x0804ab4c in main (argc=1, argv=0xbf8addd4) at ../../../kontact/src/main.cpp:219

The reporter indicates this bug may be a duplicate of or related to bug 334778.

Possible duplicates by query: bug 331678, bug 331499, bug 330269, bug 329805, bug 325911.

Reported using DrKonqi