Application: kontact (4.10.5)
KDE Platform Version: 4.10.5
Qt Version: 4.8.5
Operating System: Linux 3.10.9-200.fc19.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
- What I was doing when the application crashed: changing a recurring scheduled appointment.  From one date to another

The crash can be reproduced sometimes.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
81	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f6bab75c8c0 (LWP 1615))]

Thread 4 (Thread 0x7f6b9e515700 (LWP 1616)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003a194cd34d in WTF::TCMalloc_PageHeap::scavengerThread (this=<optimized out>) at /usr/src/debug/webkit-qtwebkit-23/Source/WTF/wtf/FastMalloc.cpp:2571
#2  0x0000003a194cd389 in WTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at /usr/src/debug/webkit-qtwebkit-23/Source/WTF/wtf/FastMalloc.cpp:1767
#3  0x00000039f0a07c53 in start_thread (arg=0x7f6b9e515700) at pthread_create.c:308
#4  0x00000039f02f5ccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f6b5da09700 (LWP 1617)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000003a1920dadd in JSC::BlockAllocator::blockFreeingThreadMain (this=0x7f6b9dc7f398) at /usr/src/debug/webkit-qtwebkit-23/Source/JavaScriptCore/heap/BlockAllocator.cpp:128
#2  0x0000003a194fcba6 in WTF::wtfThreadEntryPoint (param=0xcca410) at /usr/src/debug/webkit-qtwebkit-23/Source/WTF/wtf/ThreadingPthreads.cpp:196
#3  0x00000039f0a07c53 in start_thread (arg=0x7f6b5da09700) at pthread_create.c:308
#4  0x00000039f02f5ccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f6b4ea77700 (LWP 1630)):
#0  0x00000039f2a86f9a in g_mutex_get_impl (mutex=0x7f6b400009a0) at gthread-posix.c:121
#1  0x00000039f2a87249 in g_mutex_lock (mutex=mutex@entry=0x7f6b400009a0) at gthread-posix.c:210
#2  0x00000039f2a480a9 in g_main_context_iterate (context=context@entry=0x7f6b400009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3705
#3  0x00000039f2a481fc in g_main_context_iteration (context=0x7f6b400009a0, may_block=1) at gmain.c:3762
#4  0x00000039f83a7166 in QEventDispatcherGlib::processEvents (this=0x7f6b400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#5  0x00000039f8378ecf in QEventLoop::processEvents (this=this@entry=0x7f6b4ea76d20, flags=...) at kernel/qeventloop.cpp:149
#6  0x00000039f83791c5 in QEventLoop::exec (this=this@entry=0x7f6b4ea76d20, flags=...) at kernel/qeventloop.cpp:204
#7  0x00000039f827866f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:536
#8  0x00000039f827ad0f in QThreadPrivate::start (arg=0xfd4a90) at thread/qthread_unix.cpp:338
#9  0x00000039f0a07c53 in start_thread (arg=0x7f6b4ea77700) at pthread_create.c:308
#10 0x00000039f02f5ccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f6bab75c8c0 (LWP 1615)):
[KCrash Handler]
#6  EventViews::IncidenceMonthItem::updateDates (this=this@entry=0x5d51560, startOffset=7, endOffset=endOffset@entry=7) at /usr/src/debug/kdepim-4.10.5/calendarviews/eventviews/month/monthitem.cpp:468
#7  0x00007f6b57da50af in EventViews::IncidenceMonthItem::finalizeMove (this=0x5d51560, newStartDate=...) at /usr/src/debug/kdepim-4.10.5/calendarviews/eventviews/month/monthitem.cpp:402
#8  0x00007f6b57da8ab1 in EventViews::MonthScene::mouseReleaseEvent (this=0x63c2170, mouseEvent=0x7fff3ce81a50) at /usr/src/debug/kdepim-4.10.5/calendarviews/eventviews/month/monthscene.cpp:668
#9  0x00000039f8fa6ac0 in QGraphicsScene::event (this=0x63c2170, event=0x7fff3ce81a50) at graphicsview/qgraphicsscene.cpp:3458
#10 0x00000039f89c84dc in QApplicationPrivate::notify_helper (this=0xb6a100, receiver=0x63c2170, e=0x7fff3ce81a50) at kernel/qapplication.cpp:4562
#11 0x00000039f89ceaa0 in QApplication::notify (this=this@entry=0x7fff3ce82800, receiver=receiver@entry=0x63c2170, e=e@entry=0x7fff3ce81a50) at kernel/qapplication.cpp:4348
#12 0x0000003a02e415ba in KApplication::notify (this=0x7fff3ce82800, receiver=0x63c2170, event=0x7fff3ce81a50) at /usr/src/debug/kdelibs-4.10.5/kdeui/kernel/kapplication.cpp:311
#13 0x00000039f837a26d in QCoreApplication::notifyInternal (this=0x7fff3ce82800, receiver=0x63c2170, event=event@entry=0x7fff3ce81a50) at kernel/qcoreapplication.cpp:949
#14 0x00000039f89c6e76 in sendSpontaneousEvent (event=event@entry=0x7fff3ce81a50, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:234
#15 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff3ce81a50) at kernel/qapplication.cpp:5560
#16 0x00000039f8fbd7e7 in QGraphicsView::mouseReleaseEvent (this=0x63c1990, event=0x7fff3ce81fb0) at graphicsview/qgraphicsview.cpp:3338
#17 0x00000039f8a17b1e in QWidget::event (this=this@entry=0x63c1990, event=event@entry=0x7fff3ce81fb0) at kernel/qwidget.cpp:8376
#18 0x00000039f8db3cde in QFrame::event (this=0x63c1990, e=0x7fff3ce81fb0) at widgets/qframe.cpp:557
#19 0x00000039f8fbe209 in QGraphicsView::viewportEvent (this=0x63c1990, event=0x7fff3ce81fb0) at graphicsview/qgraphicsview.cpp:2866
#20 0x00000039f837a3d6 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x63af3f0, event=0x7fff3ce81fb0) at kernel/qcoreapplication.cpp:1059
#21 0x00000039f89c84bc in QApplicationPrivate::notify_helper (this=0xb6a100, receiver=0x63af3f0, e=0x7fff3ce81fb0) at kernel/qapplication.cpp:4558
#22 0x00000039f89cebdd in QApplication::notify (this=this@entry=0x7fff3ce82800, receiver=receiver@entry=0x63af3f0, e=e@entry=0x7fff3ce81fb0) at kernel/qapplication.cpp:4105
#23 0x0000003a02e415ba in KApplication::notify (this=0x7fff3ce82800, receiver=0x63af3f0, event=0x7fff3ce81fb0) at /usr/src/debug/kdelibs-4.10.5/kdeui/kernel/kapplication.cpp:311
#24 0x00000039f837a26d in QCoreApplication::notifyInternal (this=0x7fff3ce82800, receiver=0x63af3f0, event=0x7fff3ce81fb0) at kernel/qcoreapplication.cpp:949
#25 0x00000039f89ce393 in QApplicationPrivate::sendMouseEvent (receiver=0x63af3f0, event=0x7fff3ce81fb0, alienWidget=0x63af3f0, nativeWidget=0x63c1990, buttonDown=0x39f94a3258 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at ../../src/corelib/kernel/qcoreapplication.h:231
#26 0x00000039f8a3f92b in QETWidget::translateMouseEvent (this=0x63c1990, event=<optimized out>) at kernel/qapplication_x11.cpp:4538
#27 0x00000039f8a3e39c in QApplication::x11ProcessEvent (this=0x7fff3ce82800, event=event@entry=0x7fff3ce82320) at kernel/qapplication_x11.cpp:3661
#28 0x00000039f8a64e54 in x11EventSourceDispatch (s=s@entry=0xb6eb20, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148
#29 0x00000039f2a47e06 in g_main_dispatch (context=0xb6dee0) at gmain.c:3054
#30 g_main_context_dispatch (context=context@entry=0xb6dee0) at gmain.c:3630
#31 0x00000039f2a48158 in g_main_context_iterate (context=context@entry=0xb6dee0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3701
#32 0x00000039f2a481fc in g_main_context_iteration (context=0xb6dee0, may_block=1) at gmain.c:3762
#33 0x00000039f83a7145 in QEventDispatcherGlib::processEvents (this=0xb2ecc0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#34 0x00000039f8a64fc6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#35 0x00000039f8378ecf in QEventLoop::processEvents (this=this@entry=0x7fff3ce82700, flags=...) at kernel/qeventloop.cpp:149
#36 0x00000039f83791c5 in QEventLoop::exec (this=this@entry=0x7fff3ce82700, flags=...) at kernel/qeventloop.cpp:204
#37 0x00000039f837e45b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1221
#38 0x00000039f89c6c9c in QApplication::exec () at kernel/qapplication.cpp:3823
#39 0x0000000000403750 in main (argc=1, argv=0x7fff3ce82948) at /usr/src/debug/kdepim-4.10.5/kontact/src/main.cpp:219

Reported using DrKonqi