Application: kontact (4.14.6)
KDE Platform Version: 4.14.6
Qt Version: 4.8.6
Operating System: Linux 3.16.7-7-desktop x86_64
Distribution: "openSUSE 13.2 (Harlequin) (x86_64)"

-- Information about the crash:
I wrote a mail, as usual, and then I clicked on "Join" to add a file and it crashes.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1648ee8800 (LWP 2345))]

Thread 5 (Thread 0x7f1629fe5700 (LWP 2363)):
#0  0x00007f16404f505f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1643c95686 in WTF::TCMalloc_PageHeap::scavengerThread() () at /usr/lib64/libQtWebKit.so.4
#2  0x00007f1643c956b9 in  () at /usr/lib64/libQtWebKit.so.4
#3  0x00007f16404f10a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f164647706d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f16296cc700 (LWP 2364)):
#0  0x00007f16404f505f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1643a07e7d in JSC::BlockAllocator::blockFreeingThreadMain() () at /usr/lib64/libQtWebKit.so.4
#2  0x00007f1643cbd1e6 in WTF::wtfThreadEntryPoint(void*) () at /usr/lib64/libQtWebKit.so.4
#3  0x00007f16404f10a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f164647706d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f15cc811700 (LWP 2600)):
#0  0x00007f164646ec3d in poll () at /lib64/libc.so.6
#1  0x00007f163ff25be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f163ff25cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f1646bf10de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f15c80008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007f1646bc2e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f15cc810de0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1646bc3165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f15cc810de0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1646ac00bf in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:538
#7  0x00007f1646ac279f in QThreadPrivate::start(void*) (arg=0x12d3800) at thread/qthread_unix.cpp:349
#8  0x00007f16404f10a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f164647706d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f15c794a700 (LWP 16948)):
#0  0x00007f164646ec3d in poll () at /lib64/libc.so.6
#1  0x00007f163ff25be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f163ff25cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f1646bf10de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f15c0002e20, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007f1646bc2e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f15c7949da0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1646bc3165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f15c7949da0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1646ac00bf in QThread::exec() (this=this@entry=0x8c708c0) at thread/qthread.cpp:538
#7  0x00007f1646ba4783 in QInotifyFileSystemWatcherEngine::run() (this=0x8c708c0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f1646ac279f in QThreadPrivate::start(void*) (arg=0x8c708c0) at thread/qthread_unix.cpp:349
#9  0x00007f16404f10a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f164647706d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f1648ee8800 (LWP 2345)):
[KCrash Handler]
#6  0xffffffffffffffff in  ()#7  0x00007f163d00fbc2 in  () at /lib64/libdbus-1.so.3
#8  0x00007f163d0100d2 in dbus_message_unref () at /lib64/libdbus-1.so.3
#9  0x00007f16457f6de7 in QDBusMessagePrivate::~QDBusMessagePrivate() (message=<optimized out>) at qdbus_symbols_p.h:296
#10 0x00007f16457f6de7 in QDBusMessagePrivate::~QDBusMessagePrivate() (this=0x9005470, __in_chrg=<optimized out>) at qdbusmessage.cpp:75
#11 0x00007f16457f6f7f in QDBusMessage::~QDBusMessage() (this=0x1cc2700, __in_chrg=<optimized out>) at qdbusmessage.cpp:537
#12 0x00007f16457f1eae in QDBusConnectionPrivate::getNameOwnerNoCache(QString const&) (this=this@entry=0x1cd00a0, serviceName=...) at qdbusintegrator.cpp:2362
#13 0x00007f16457f3074 in QDBusConnectionPrivate::getNameOwner(QString const&) (this=0x1cd00a0, serviceName=...) at qdbusintegrator.cpp:2352
#14 0x00007f16457f99d3 in QDBusAbstractInterfacePrivate::QDBusAbstractInterfacePrivate(QString const&, QString const&, QString const&, QDBusConnection const&, bool) (this=0x8caff90, serv=..., p=..., iface=..., con=..., isDynamic=<optimized out>) at qdbusabstractinterface.cpp:101
#15 0x00007f16457fe718 in QDBusInterfacePrivate::QDBusInterfacePrivate(QString const&, QString const&, QString const&, QDBusConnection const&) (this=0x8caff90, serv=..., p=..., iface=..., con=...) at qdbusinterface.cpp:154
#16 0x00007f16457fe8a5 in QDBusInterface::QDBusInterface(QString const&, QString const&, QString const&, QDBusConnection const&, QObject*) (this=0x8cafdc8, service=..., path=..., interface=..., connection=..., parent=0x0) at qdbusinterface.cpp:220
#17 0x00007f163d8f1e1c in Solid::Backends::UPower::UPowerManager::UPowerManager(QObject*) (this=0x8cafdb0, parent=<optimized out>) at /usr/src/debug/kdelibs-4.14.6/solid/solid/backends/upower/upowermanager.cpp:41
#18 0x00007f163d8a14bc in Solid::ManagerBasePrivate::loadBackends() (this=this@entry=0x8cad7c0) at /usr/src/debug/kdelibs-4.14.6/solid/solid/managerbase.cpp:99
#19 0x00007f163d8a2cc5 in Solid::DeviceManagerPrivate::DeviceManagerPrivate() (this=0x8cad7b0) at /usr/src/debug/kdelibs-4.14.6/solid/solid/devicemanager.cpp:38
#20 0x00007f163d8a2e45 in Solid::DeviceManagerStorage::ensureManagerCreated() (this=this@entry=0x7eabec0) at /usr/src/debug/kdelibs-4.14.6/solid/solid/devicemanager.cpp:287
#21 0x00007f163d8a2f01 in Solid::DeviceNotifier::instance() (this=<optimized out>) at /usr/src/debug/kdelibs-4.14.6/solid/solid/devicemanager.cpp:280
#22 0x00007f163d8a2f01 in Solid::DeviceNotifier::instance() () at /usr/src/debug/kdelibs-4.14.6/solid/solid/devicemanager.cpp:172
#23 0x00007f163d8a1748 in Solid::Device::Device(QString const&) (this=0x8cb1e18, udi=...) at /usr/src/debug/kdelibs-4.14.6/solid/solid/device.cpp:78
#24 0x00007f15bf69a150 in KFilePlacesItem::KFilePlacesItem(KBookmarkManager*, QString const&, QString const&) (this=0x8cb1de0, manager=<optimized out>, address=..., udi=...) at /usr/src/debug/kdelibs-4.14.6/kfile/kfileplacesitem.cpp:42
#25 0x00007f15bf69ca09 in KFilePlacesModel::Private::loadBookmarkList() (this=this@entry=0x7f02c30) at /usr/src/debug/kdelibs-4.14.6/kfile/kfileplacesmodel.cpp:453
#26 0x00007f15bf69cbe3 in KFilePlacesModel::Private::_k_reloadBookmarks() (this=0x7f02c30) at /usr/src/debug/kdelibs-4.14.6/kfile/kfileplacesmodel.cpp:362
#27 0x00007f15bf69d8a8 in KFilePlacesModel::KFilePlacesModel(QObject*) (this=0x8c28f80, parent=<optimized out>) at /usr/src/debug/kdelibs-4.14.6/kfile/kfileplacesmodel.cpp:174
#28 0x00007f15bf6949a4 in KFileWidget::KFileWidget(KUrl const&, QWidget*) (this=0x7f27fa0, _startDir=..., parent=<optimized out>) at /usr/src/debug/kdelibs-4.14.6/kfile/kfilewidget.cpp:343
#29 0x00007f15bf8e3f15 in  () at /usr/lib64/kde4/kfilemodule.so
#30 0x00007f1645e62d5f in KFileDialog::KFileDialog(KUrl const&, QString const&, QWidget*, QWidget*) (this=0x76f3140, startDir=..., filter=..., parent=<optimized out>, customWidget=0x0) at /usr/src/debug/kdelibs-4.14.6/kio/kfile/kfiledialog.cpp:266
#31 0x00007f1645e5ee69 in KEncodingFileDialog::KEncodingFileDialog(QString const&, QString const&, QString const&, QString const&, KFileDialog::OperationMode, QWidget*) (this=0x76f3140, startDir=..., encoding=..., filter=..., caption=..., type=KFileDialog::Other, parent=0x6a68600) at /usr/src/debug/kdelibs-4.14.6/kio/kfile/kencodingfiledialog.cpp:41
#32 0x00007f15db13e932 in MessageComposer::AttachmentControllerBase::showAddAttachmentFileDialog() () at /usr/lib64/libmessagecomposer.so.4
#33 0x00007f15db146595 in  () at /usr/lib64/libmessagecomposer.so.4
#34 0x00007f1646bd81fa in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x8986090, m=m@entry=0x7f16480764a0 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fff18270010) at kernel/qobject.cpp:3576
#35 0x00007f16475cc622 in QAction::triggered(bool) (this=this@entry=0x8986090, _t1=false) at .moc/release-shared/moc_qaction.cpp:276
#36 0x00007f16475cdfd3 in QAction::activate(QAction::ActionEvent) (this=0x8986090, event=<optimized out>) at kernel/qaction.cpp:1257
#37 0x00007f1647980112 in QAbstractButtonPrivate::click() (this=this@entry=0x8b2c5c0) at widgets/qabstractbutton.cpp:530
#38 0x00007f164798023c in QAbstractButton::mouseReleaseEvent(QMouseEvent*) (this=0x8b03390, e=0x7fff18270510) at widgets/qabstractbutton.cpp:1123
#39 0x00007f1647a3716a in QToolButton::mouseReleaseEvent(QMouseEvent*) (this=<optimized out>, e=<optimized out>) at widgets/qtoolbutton.cpp:723
#40 0x00007f1647621c0a in QWidget::event(QEvent*) (this=0x8b03390, event=0x7fff18270510) at kernel/qwidget.cpp:8389
#41 0x00007f16475d276c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x1148d50, receiver=receiver@entry=0x8b03390, e=e@entry=0x7fff18270510) at kernel/qapplication.cpp:4565
#42 0x00007f16475d8dea in QApplication::notify(QObject*, QEvent*) (this=this@entry=0x7fff18270d50, receiver=receiver@entry=0x8b03390, e=e@entry=0x7fff18270510) at kernel/qapplication.cpp:4108
#43 0x00007f16482eacea in KApplication::notify(QObject*, QEvent*) (this=0x7fff18270d50, receiver=0x8b03390, event=0x7fff18270510) at /usr/src/debug/kdelibs-4.14.6/kdeui/kernel/kapplication.cpp:311
#44 0x00007f1646bc42ad in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7fff18270d50, receiver=receiver@entry=0x8b03390, event=event@entry=0x7fff18270510) at kernel/qcoreapplication.cpp:953
#45 0x00007f16475d85e3 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) (event=<optimized out>, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:231
#46 0x00007f16475d85e3 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) (receiver=receiver@entry=0x8b03390, event=event@entry=0x7fff18270510, alienWidget=alienWidget@entry=0x8b03390, nativeWidget=nativeWidget@entry=0x6a68600, buttonDown=buttonDown@entry=0x7f16480b2278 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3173
#47 0x00007f1647649c9b in QETWidget::translateMouseEvent(_XEvent const*) (this=this@entry=0x6a68600, event=event@entry=0x7fff18270880) at kernel/qapplication_x11.cpp:4530
#48 0x00007f164764870c in QApplication::x11ProcessEvent(_XEvent*) (this=0x7fff18270d50, event=event@entry=0x7fff18270880) at kernel/qapplication_x11.cpp:3653
#49 0x00007f164766f5c2 in x11EventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x11411b0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#50 0x00007f163ff25a04 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#51 0x00007f163ff25c48 in  () at /usr/lib64/libglib-2.0.so.0
#52 0x00007f163ff25cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#53 0x00007f1646bf10de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x10b4fd0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#54 0x00007f164766f676 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#55 0x00007f1646bc2e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff18270c50, flags=...) at kernel/qeventloop.cpp:149
#56 0x00007f1646bc3165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff18270c50, flags=...) at kernel/qeventloop.cpp:204
#57 0x00007f1646bc85b9 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1225
#58 0x00000000004037f2 in  ()
#59 0x00007f16463b3b05 in __libc_start_main () at /lib64/libc.so.6
#60 0x0000000000403c97 in _start ()

Reported using DrKonqi