Bug 263823

Application: plasma-desktop (0.4)
KDE Platform Version: 4.5.95 (4.6 RC2)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-25-generic i686
Distribution: Ubuntu 10.10

-- Information about the crash:
- What I was doing when the application crashed:
Plasma crashed immediately after deletion of a calendar event in Kontact.

For me this happens very rarely, as I have KCalendar in extensive daily use and it was the first time plasma crashed on this action.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb787b940 (LWP 1721))]

Thread 4 (Thread 0xaf747b70 (LWP 1726)):
#0  0x029943f4 in pthread_mutex_lock () from /lib/libpthread.so.0
#1  0x003e8f66 in pthread_mutex_lock () from /lib/libc.so.6
#2  0x03a91ea3 in g_main_context_prepare () from /lib/libglib-2.0.so.0
#3  0x03a92279 in ?? () from /lib/libglib-2.0.so.0
#4  0x03a92848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#5  0x02b9159f in QEventDispatcherGlib::processEvents (this=0x9721120, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#6  0x02b61609 in QEventLoop::processEvents (this=0xaf747280, flags=) at kernel/qeventloop.cpp:149
#7  0x02b61a8a in QEventLoop::exec (this=0xaf747280, flags=...) at kernel/qeventloop.cpp:201
#8  0x02a5db7e in QThread::exec (this=0x9720a70) at thread/qthread.cpp:490
#9  0x02b4035b in QInotifyFileSystemWatcherEngine::run (this=0x9720a70) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x02a60df9 in QThreadPrivate::start (arg=0x9720a70) at thread/qthread_unix.cpp:266
#11 0x02991cc9 in start_thread () from /lib/libpthread.so.0
#12 0x003db69e in clone () from /lib/libc.so.6

Thread 3 (Thread 0xaef46b70 (LWP 1727)):
#0  0x00321b1f in ?? () from /lib/libc.so.6
#1  0x03a91ad8 in g_main_context_check () from /lib/libglib-2.0.so.0
#2  0x03a9245e in ?? () from /lib/libglib-2.0.so.0
#3  0x03a92848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#4  0x02b9159f in QEventDispatcherGlib::processEvents (this=0x9591e40, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#5  0x02b61609 in QEventLoop::processEvents (this=0xaef462a0, flags=) at kernel/qeventloop.cpp:149
#6  0x02b61a8a in QEventLoop::exec (this=0xaef462a0, flags=...) at kernel/qeventloop.cpp:201
#7  0x02a5db7e in QThread::exec (this=0x972f198) at thread/qthread.cpp:490
#8  0x03d1a171 in Herqq::Upnp::HControlPointThread::run() () from /usr/lib/libHUpnp.so.0
#9  0x02a60df9 in QThreadPrivate::start (arg=0x972f198) at thread/qthread_unix.cpp:266
#10 0x02991cc9 in start_thread () from /lib/libpthread.so.0
#11 0x003db69e in clone () from /lib/libc.so.6

Thread 2 (Thread 0xad7ffb70 (LWP 1728)):
#0  0x029957df in __pthread_mutex_unlock_usercnt () from /lib/libpthread.so.0
#1  0x003e8fa6 in pthread_mutex_unlock () from /lib/libc.so.6
#2  0x03a904fb in g_main_context_release () from /lib/libglib-2.0.so.0
#3  0x03a92473 in ?? () from /lib/libglib-2.0.so.0
#4  0x03a92848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#5  0x02b9159f in QEventDispatcherGlib::processEvents (this=0x96ff0c0, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#6  0x02b61609 in QEventLoop::processEvents (this=0xad7ff280, flags=) at kernel/qeventloop.cpp:149
#7  0x02b61a8a in QEventLoop::exec (this=0xad7ff280, flags=...) at kernel/qeventloop.cpp:201
#8  0x02a5db7e in QThread::exec (this=0x97f9738) at thread/qthread.cpp:490
#9  0x02b4035b in QInotifyFileSystemWatcherEngine::run (this=0x97f9738) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x02a60df9 in QThreadPrivate::start (arg=0x97f9738) at thread/qthread_unix.cpp:266
#11 0x02991cc9 in start_thread () from /lib/libpthread.so.0
#12 0x003db69e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb787b940 (LWP 1721)):
[KCrash Handler]
#7  QString (this=0x0) at /usr/include/qt4/QtCore/qstring.h:727
#8  KCalCore::IncidenceBase::uid (this=0x0) at ../../kcalcore/incidencebase.cpp:226
#9  0x04b410e3 in CalendarSupport::Calendar::Private::removeItemFromMaps (this=0x9b4fc78, item=...) at ../../../../../plasma/generic/dataengines/calendar/akonadi/calendar.cpp:420
#10 0x04b42180 in CalendarSupport::Calendar::Private::itemsRemoved (this=0x9b4fc78, items=...) at ../../../../../plasma/generic/dataengines/calendar/akonadi/calendar.cpp:449
#11 0x04b43023 in CalendarSupport::Calendar::Private::rowsAboutToBeRemoved (this=0x9b4fc78, parent=..., start=0, end=0) at ../../../../../plasma/generic/dataengines/calendar/akonadi/calendar.cpp:118
#12 0x04b1f3f7 in CalendarSupport::Calendar::Private::qt_metacall (this=0x9b4fc78, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0xbfe02960) at moc_calendar_p.cpp:149
#13 0x02b688ca in QMetaObject::metacall (object=0x9b4fc78, cl=QMetaObject::InvokeMetaMethod, idx=9, argv=0xbfe02960) at kernel/qmetaobject.cpp:237
#14 0x02b7b6ad in QMetaObject::activate (sender=0x9b542b0, m=0x2c95198, local_signal_index=6, argv=0xbfe0270c) at kernel/qobject.cpp:3280
#15 0x02bcc35f in QAbstractItemModel::rowsAboutToBeRemoved (this=0x9b542b0, _t1=..., _t2=0, _t3=0) at .moc/release-shared/moc_qabstractitemmodel.cpp:188
#16 0x02b5a605 in QAbstractItemModel::beginRemoveRows (this=0x9b542b0, parent=..., first=0, last=0) at kernel/qabstractitemmodel.cpp:2450
#17 0x05e1d426 in Akonadi::EntityTreeModelPrivate::monitoredItemRemoved (this=0x9b4fa20, item=...) at ../../akonadi/entitytreemodel_p.cpp:917
#18 0x05e11018 in Akonadi::EntityTreeModel::qt_metacall (this=0x9b542b0, _c=QMetaObject::InvokeMetaMethod, _id=47, _a=0xbfe02bc8) at ./entitytreemodel.moc:155
#19 0x04b1f4d2 in CalendarSupport::CalendarModel::qt_metacall (this=0x9b542b0, _c=QMetaObject::InvokeMetaMethod, _id=47, _a=0xbfe02bc8) at moc_calendarmodel.cpp:66
#20 0x02b688ca in QMetaObject::metacall (object=0x9b542b0, cl=QMetaObject::InvokeMetaMethod, idx=47, argv=0xbfe02bc8) at kernel/qmetaobject.cpp:237
#21 0x02b7b6ad in QMetaObject::activate (sender=0x9b50620, m=0x5f5e834, local_signal_index=3, argv=0xbfe0270c) at kernel/qobject.cpp:3280
#22 0x05e6a963 in Akonadi::Monitor::itemRemoved (this=0x9b50620, _t1=...) at ./monitor.moc:190
#23 0x05e6de92 in Akonadi::MonitorPrivate::emitItemNotification (this=0x9b50558, msg=..., item=..., collection=..., collectionDest=...) at ../../akonadi/monitor_p.cpp:442
#24 0x05e6efc7 in Akonadi::MonitorPrivate::emitNotification (this=0x9b50558, msg=...) at ../../akonadi/monitor_p.cpp:267
#25 0x05dc6f3c in Akonadi::ChangeRecorderPrivate::emitNotification(Akonadi::NotificationMessage const&) () from /usr/lib/libakonadi-kde.so.4
#26 0x05e6eb5f in Akonadi::MonitorPrivate::dispatchNotifications (this=0x9b50558) at ../../akonadi/monitor_p.cpp:212
#27 0x05e71570 in Akonadi::MonitorPrivate::slotNotify (this=0x9b50558, msgs=...) at ../../akonadi/monitor_p.cpp:372
#28 0x05dca50e in Akonadi::ChangeRecorderPrivate::slotNotify(QList<Akonadi::NotificationMessage> const&) () from /usr/lib/libakonadi-kde.so.4
#29 0x05e6ae24 in Akonadi::Monitor::qt_metacall (this=0x9b50620, _c=QMetaObject::InvokeMetaMethod, _id=26, _a=0xbfe02fe8) at ./monitor.moc:155
#30 0x05dc6b6a in Akonadi::ChangeRecorder::qt_metacall (this=0x9b50620, _c=QMetaObject::InvokeMetaMethod, _id=26, _a=0xbfe02fe8) at ./changerecorder.moc:72
#31 0x02b688ca in QMetaObject::metacall (object=0x9b50620, cl=QMetaObject::InvokeMetaMethod, idx=26, argv=0xbfe02fe8) at kernel/qmetaobject.cpp:237
#32 0x02b7b6ad in QMetaObject::activate (sender=0x9d3df40, m=0x5f606c4, local_signal_index=0, argv=0xbfe0270c) at kernel/qobject.cpp:3280
#33 0x05eea073 in OrgFreedesktopAkonadiNotificationSourceInterface::notify (this=0x9d3df40, _t1=...) at notificationsourceinterface.moc:91
#34 0x05eea29d in OrgFreedesktopAkonadiNotificationSourceInterface::qt_metacall (this=0x9d3df40, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfe0316c) at notificationsourceinterface.moc:77
#35 0x002119dc in QDBusConnectionPrivate::deliverCall (this=0x8fdd2b8, object=0x9d3df40, msg=..., metaTypes=..., slotIdx=5) at qdbusintegrator.cpp:919
#36 0x0021d1f7 in QDBusCallDeliveryEvent::placeMetaCall (this=0xc3ea328, object=0x9d3df40) at qdbusintegrator_p.h:103
#37 0x02b756a2 in QObject::event (this=0x9d3df40, e=0x0) at kernel/qobject.cpp:1219
#38 0x0307dfdc in QApplicationPrivate::notify_helper (this=0x8fe8010, receiver=0x9d3df40, e=0xc3ea328) at kernel/qapplication.cpp:4396
#39 0x0308404e in QApplication::notify (this=0x8fdc768, receiver=0x9d3df40, e=0xc3ea328) at kernel/qapplication.cpp:3798
#40 0x0114ff8a in KApplication::notify (this=0x8fdc768, receiver=0x9d3df40, event=0xc3ea328) at ../../kdeui/kernel/kapplication.cpp:311
#41 0x02b62b3b in QCoreApplication::notifyInternal (this=0x8fdc768, receiver=0x9d3df40, event=0xc3ea328) at kernel/qcoreapplication.cpp:732
#42 0x02b65d8b in sendEvent (receiver=0x0, event_type=0, data=0x8fa6638) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#43 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8fa6638) at kernel/qcoreapplication.cpp:1373
#44 0x02b65f4d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1266
#45 0x02b91a74 in sendPostedEvents (s=0x8fea388) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#46 postEventSourceDispatch (s=0x8fea388) at kernel/qeventdispatcher_glib.cpp:277
#47 0x03a8e855 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#48 0x03a92668 in ?? () from /lib/libglib-2.0.so.0
#49 0x03a92848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#50 0x02b91565 in QEventDispatcherGlib::processEvents (this=0x8fda1f0, flags=...) at kernel/qeventdispatcher_glib.cpp:415
#51 0x0313fbe5 in QGuiEventDispatcherGlib::processEvents (this=0x8fda1f0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#52 0x02b61609 in QEventLoop::processEvents (this=0xbfe03994, flags=) at kernel/qeventloop.cpp:149
#53 0x02b61a8a in QEventLoop::exec (this=0xbfe03994, flags=...) at kernel/qeventloop.cpp:201
#54 0x02b6600f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#55 0x0307ce07 in QApplication::exec () at kernel/qapplication.cpp:3672
#56 0x00914fb7 in kdemain (argc=1, argv=0xbfe03ba4) at ../../../../plasma/desktop/shell/main.cpp:118
#57 0x080485bb in main (argc=1, argv=0xbfe03ba4) at plasma-desktop_dummy.cpp:3

This bug may be a duplicate of or related to bug 262117.

Possible duplicates by query: bug 262117, bug 261853.

Reported using DrKonqi