Application: kontact (4.12.3)
KDE Platform Version: 4.12.3
Qt Version: 4.8.6
Operating System: Linux 3.13.0-16-generic x86_64
Distribution: Ubuntu Trusty Tahr (development branch)

-- Information about the crash:
- What I was doing when the application crashed:I do not know...I was watching a video when this crash happened...

-- 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 0x7f473cf22800 (LWP 2399))]

Thread 4 (Thread 0x7f471e08b700 (LWP 2403)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4737cf63bd in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f4737cf63f9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f4734417182 in start_thread (arg=0x7f471e08b700) at pthread_create.c:312
#4  0x00007f473a49412d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f46dd788700 (LWP 2404)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4737a36d2d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f4737d25c76 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f4734417182 in start_thread (arg=0x7f46dd788700) at pthread_create.c:312
#4  0x00007f473a49412d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f46bb7b4700 (LWP 2789)):
[KCrash Handler]
#5  0x00007f473169ec1e in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#6  0x00007f47316980c2 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#7  0x00007f47316985b2 in dbus_message_unref () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#8  0x00007f473982a099 in q_dbus_message_unref (message=<optimized out>) at qdbus_symbols_p.h:296
#9  ~QDBusArgumentPrivate (this=<optimized out>, __in_chrg=<optimized out>) at qdbusargument.cpp:66
#10 QDBusArgument::~QDBusArgument (this=0x24a8900, __in_chrg=<optimized out>) at qdbusargument.cpp:348
#11 0x00007f4739806bce in qMetaTypeDeleteHelper<QDBusArgument> (t=0x34d1b80) at ../../include/QtCore/../../src/corelib/kernel/qmetatype.h:134
#12 0x00007f473ac04073 in clear (d=0x790d610) at kernel/qvariant.cpp:290
#13 0x00007f47397f5e2c in node_destruct (this=<optimized out>, to=<optimized out>, from=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:431
#14 free (this=<optimized out>, data=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:757
#15 QList<QVariant>::~QList (this=0x24a8900, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:732
#16 0x00007f473980a40f in QDBusMessage::~QDBusMessage (this=0x24a8900, __in_chrg=<optimized out>) at qdbusmessage.cpp:537
#17 0x00007f47398071b6 in ~QDBusCallDeliveryEvent (this=0x6c60280, __in_chrg=<optimized out>) at qdbusintegrator_p.h:93
#18 QDBusCallDeliveryEvent::~QDBusCallDeliveryEvent (this=0x6c60280, __in_chrg=<optimized out>) at qdbusintegrator_p.h:93
#19 0x00007f473abe3b36 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x2b92270) at kernel/qcoreapplication.cpp:1593
#20 0x00007f473abe3fd3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#21 0x00007f473ac0df53 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#22 postEventSourceDispatch (s=0x7f46b4001350) at kernel/qeventdispatcher_glib.cpp:280
#23 0x00007f4733f37e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f4733f38048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f4733f380ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f473ac0d836 in QEventDispatcherGlib::processEvents (this=0x7f46b40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#27 0x00007f473abdf09f in QEventLoop::processEvents (this=this@entry=0x7f46bb7b3de0, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f473abdf395 in QEventLoop::exec (this=this@entry=0x7f46bb7b3de0, flags=...) at kernel/qeventloop.cpp:204
#29 0x00007f473aadbc4f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#30 0x00007f473aade31f in QThreadPrivate::start (arg=0x2143e90) at thread/qthread_unix.cpp:349
#31 0x00007f4734417182 in start_thread (arg=0x7f46bb7b4700) at pthread_create.c:312
#32 0x00007f473a49412d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f473cf22800 (LWP 2399)):
#0  0x00007f473a4854dd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4733f78c00 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4733f37b14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4733f37f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4733f380ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f473ac0d836 in QEventDispatcherGlib::processEvents (this=0x1e9bea0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#6  0x00007f473b674bb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#7  0x00007f473abdf09f in QEventLoop::processEvents (this=this@entry=0x7fffa799b8c0, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f473abdf395 in QEventLoop::exec (this=this@entry=0x7fffa799b8c0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f473abe4b69 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#10 0x0000000000403660 in ?? ()
#11 0x00007f473a3baec5 in __libc_start_main (main=0x402bb0, argc=3, argv=0x7fffa799bb08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa799baf8) at libc-start.c:285
#12 0x0000000000403b28 in _start ()

Reported using DrKonqi