Application: kate (16.12.1)
 (Compiled from sources)
Qt Version: 5.7.1
Frameworks Version: 5.30.0
Operating System: Linux 4.9.3 x86_64
Distribution (Platform): Gentoo Packages

-- Information about the crash:
I was opening a saved session, after a brief moment kate notified me that one of the files was not reachble and then crashed.
The bug could well be in the pulseaudio -> phonon-vlc stack rather than in kate

-- Backtrace:
Application: Kate (kate), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
90	    lll_wait_tid (pd->tid);
[Current thread is 1 (Thread 0x7f938566e7c0 (LWP 2180))]

Thread 5 (Thread 0x7f938278f700 (LWP 2183)):
#0  0x00007f938ddf00ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f938b902850 in _xcb_conn_wait () from /usr/lib64/libxcb.so.1
#2  0x00007f938b9044e9 in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007f938531e8c9 in QXcbEventReader::run() () from /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007f938e84ffbd in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f938b4de454 in start_thread (arg=0x7f938278f700) at pthread_create.c:333
#6  0x00007f938ddf8a6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f9379cc2700 (LWP 2184)):
#0  0x00007f938ddf00ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f93897fbca6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f9374003020, timeout=<optimized out>, context=0x7f9374000990) at /usr/src/debug/dev-libs/glib-2.48.2/glib-2.48.2/glib/gmain.c:4135
#2  g_main_context_iterate (context=context@entry=0x7f9374000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /usr/src/debug/dev-libs/glib-2.48.2/glib-2.48.2/glib/gmain.c:3835
#3  0x00007f93897fbdac in g_main_context_iteration (context=0x7f9374000990, may_block=1) at /usr/src/debug/dev-libs/glib-2.48.2/glib-2.48.2/glib/gmain.c:3901
#4  0x00007f938ea2896b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f938e9dd1ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#6  0x00007f938e84bf5b in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#7  0x00007f9392aa5755 in QDBusConnectionManager::run() () from /usr/lib64/libQt5DBus.so.5
#8  0x00007f938e84ffbd in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#9  0x00007f938b4de454 in start_thread (arg=0x7f9379cc2700) at pthread_create.c:333
#10 0x00007f938ddf8a6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f9367110700 (LWP 2705)):
#0  0x00007f938ddf00ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f937bbd3a21 in poll_func () from /usr/lib64/libpulse.so.0
#2  0x00007f937bbc58e1 in pa_mainloop_poll () from /usr/lib64/libpulse.so.0
#3  0x00007f937bbc5f3e in pa_mainloop_iterate () from /usr/lib64/libpulse.so.0
#4  0x00007f937bbc5ff0 in pa_mainloop_run () from /usr/lib64/libpulse.so.0
#5  0x00007f937bbd3986 in thread () from /usr/lib64/libpulse.so.0
#6  0x00007f937b5659c8 in internal_thread_func () from /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#7  0x00007f938b4de454 in start_thread (arg=0x7f9367110700) at pthread_create.c:333
#8  0x00007f938ddf8a6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f936290f700 (LWP 2706)):
[KCrash Handler]
#6  0x00007f937a62560d in vorbis_info_clear () from /usr/lib64/libvorbis.so.0
#7  0x00007f93575d7f74 in Ogg_LogicalStreamDelete.isra.8 () from /usr/lib64/vlc/plugins/demux/libogg_plugin.so
#8  0x00007f93575d801a in Ogg_EndOfStream () from /usr/lib64/vlc/plugins/demux/libogg_plugin.so
#9  0x00007f93575d8130 in Close () from /usr/lib64/vlc/plugins/demux/libogg_plugin.so
#10 0x00007f936c0c1412 in vlc_module_unload () from /usr/lib64/libvlccore.so.8
#11 0x00007f936c08bb72 in demux_Delete () from /usr/lib64/libvlccore.so.8
#12 0x00007f936c09573e in InputSourceClean () from /usr/lib64/libvlccore.so.8
#13 0x00007f936c095845 in End () from /usr/lib64/libvlccore.so.8
#14 0x00007f936c09aa2d in Run () from /usr/lib64/libvlccore.so.8
#15 0x00007f938b4de454 in start_thread (arg=0x7f936290f700) at pthread_create.c:333
#16 0x00007f938ddf8a6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f938566e7c0 (LWP 2180)):
#0  0x00007f938b4df6cd in pthread_join (threadid=140270990587648, thread_return=0x0) at pthread_join.c:90
#1  0x00007f936c09635f in input_Close () from /usr/lib64/libvlccore.so.8
#2  0x00007f936be4963c in libvlc_media_player_stop () from /usr/lib64/libvlc.so.5
#3  0x00007f936c356462 in Phonon::VLC::MediaObject::stop() () from /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_vlc.so
#4  0x00007f9381042399 in NotifyByAudio::close(KNotification*) () from /usr/lib64/libKF5Notifications.so.5
#5  0x00007f9381024daa in KNotificationManager::close(int, bool) () from /usr/lib64/libKF5Notifications.so.5
#6  0x00007f9381023914 in KNotification::~KNotification() () from /usr/lib64/libKF5Notifications.so.5
#7  0x00007f9381023a89 in KNotification::~KNotification() () from /usr/lib64/libKF5Notifications.so.5
#8  0x00007f938ea09cfc in QObjectPrivate::deleteChildren() () from /usr/lib64/libQt5Core.so.5
#9  0x00007f938f70acbb in QWidget::~QWidget() () from /usr/lib64/libQt5Widgets.so.5
#10 0x00007f938f8a3b99 in QDialog::~QDialog() () from /usr/lib64/libQt5Widgets.so.5
#11 0x00007f93907531c1 in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QIcon const&, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&, QMessageBox::Icon) () from /usr/lib64/libKF5WidgetsAddons.so.5
#12 0x00007f9390753c56 in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QMessageBox::Icon, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&) () from /usr/lib64/libKF5WidgetsAddons.so.5
#13 0x00007f9390757400 in KMessageBox::informationListInternal(QDialog*, QString const&, QStringList const&, QString const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib64/libKF5WidgetsAddons.so.5
#14 0x00007f93907575e1 in KMessageBox::information(QWidget*, QString const&, QString const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib64/libKF5WidgetsAddons.so.5
#15 0x000000000042b839 in KateDocManager::showRestoreErrors() ()
#16 0x00000000004704e5 in KateDocManager::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
#17 0x00007f938ea046f9 in QObject::event(QEvent*) () from /usr/lib64/libQt5Core.so.5
#18 0x00007f938f6caa8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#19 0x00007f938f6d1c41 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#20 0x00007f938e9de10a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#21 0x00007f938e9e074d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQt5Core.so.5
#22 0x00007f938ea288d3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib64/libQt5Core.so.5
#23 0x00007f93897fbad7 in g_main_dispatch (context=0x7f937c0016f0) at /usr/src/debug/dev-libs/glib-2.48.2/glib-2.48.2/glib/gmain.c:3154
#24 g_main_context_dispatch (context=context@entry=0x7f937c0016f0) at /usr/src/debug/dev-libs/glib-2.48.2/glib-2.48.2/glib/gmain.c:3769
#25 0x00007f93897fbd08 in g_main_context_iterate (context=context@entry=0x7f937c0016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /usr/src/debug/dev-libs/glib-2.48.2/glib-2.48.2/glib/gmain.c:3840
#26 0x00007f93897fbdac in g_main_context_iteration (context=0x7f937c0016f0, may_block=1) at /usr/src/debug/dev-libs/glib-2.48.2/glib-2.48.2/glib/gmain.c:3901
#27 0x00007f938ea2894f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#28 0x00007f938e9dd1ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#29 0x00007f938e9e47fd in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
#30 0x000000000042451e in main ()

Reported using DrKonqi