Application: dragon (16.12.3)
 (Compiled from sources)
Qt Version: 5.7.1
Frameworks Version: 5.34.0
Operating System: Linux 4.11.5-gentoo x86_64
Distribution: "Gentoo Base System release 2.3"

-- Information about the crash:
- What I was doing when the application crashed:

Tried to open a corrupt video file, see the following attachments.

The crash can be reproduced every time.

-- Backtrace:
Application: Dragon Player (dragon), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4dfcabe840 (LWP 12236))]

Thread 4 (Thread 0x7f4dd7fff700 (LWP 12240)):
#0  0x00007f4df88db80d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4df20f41b1 in read (__nbytes=10, __buf=0x7f4dd7ffebb0, __fd=13) at /usr/include/bits/unistd.h:44
#2  pa_read (fd=13, buf=buf@entry=0x7f4dd7ffebb0, count=count@entry=10, type=type@entry=0x8791f8) at /var/tmp/portage/media-sound/pulseaudio-10.0/work/pulseaudio-10.0/src/pulsecore/core-util.c:434
#3  0x00007f4df611272e in clear_wakeup (m=<optimized out>) at /var/tmp/portage/media-sound/pulseaudio-10.0/work/pulseaudio-10.0/src/pulse/mainloop.c:781
#4  pa_mainloop_prepare (m=m@entry=0x879120, timeout=-1) at /var/tmp/portage/media-sound/pulseaudio-10.0/work/pulseaudio-10.0/src/pulse/mainloop.c:789
#5  0x00007f4df61131a0 in pa_mainloop_iterate (m=0x879120, block=<optimized out>, retval=0x0) at /var/tmp/portage/media-sound/pulseaudio-10.0/work/pulseaudio-10.0/src/pulse/mainloop.c:923
#6  0x00007f4df6113260 in pa_mainloop_run (m=0x879120, retval=retval@entry=0x0) at /var/tmp/portage/media-sound/pulseaudio-10.0/work/pulseaudio-10.0/src/pulse/mainloop.c:944
#7  0x00007f4df6121499 in thread (userdata=0x87f830) at /var/tmp/portage/media-sound/pulseaudio-10.0/work/pulseaudio-10.0/src/pulse/thread-mainloop.c:100
#8  0x00007f4df2123bb8 in internal_thread_func (userdata=0x77c7f0) at /var/tmp/portage/media-sound/pulseaudio-10.0/work/pulseaudio-10.0/src/pulsecore/thread-posix.c:81
#9  0x00007f4df6989494 in start_thread (arg=0x7f4dd7fff700) at pthread_create.c:333
#10 0x00007f4df88e894d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4de2f75700 (LWP 12238)):
#0  0x00007f4df88df84d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4df41e180c in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7f4ddc003020, timeout=-1, context=0x7f4ddc000990) at /var/tmp/portage/dev-libs/glib-2.50.3-r1/work/glib-2.50.3/glib/gmain.c:4228
#2  g_main_context_iterate (context=context@entry=0x7f4ddc000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.50.3-r1/work/glib-2.50.3/glib/gmain.c:3924
#3  0x00007f4df41e191c in g_main_context_iteration (context=0x7f4ddc000990, may_block=may_block@entry=1) at /var/tmp/portage/dev-libs/glib-2.50.3-r1/work/glib-2.50.3/glib/gmain.c:3990
#4  0x00007f4df951ba5b in QEventDispatcherGlib::processEvents (this=0x7f4ddc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f4df94cd5ca in QEventLoop::exec (this=this@entry=0x7f4de2f74d50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f4df93320f4 in QThread::exec (this=this@entry=0x7f4dfcc75740 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507
#7  0x00007f4dfcc01695 in QDBusConnectionManager::run (this=0x7f4dfcc75740 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007f4df933635c in QThreadPrivate::start (arg=0x7f4dfcc75740 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#9  0x00007f4df6989494 in start_thread (arg=0x7f4de2f75700) at pthread_create.c:333
#10 0x00007f4df88e894d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4de9a2d700 (LWP 12237)):
#0  0x00007f4df88df84d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4df654e8f2 in poll (__timeout=-1, __nfds=1, __fds=0x7f4de9a2cc80) at /usr/include/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x67b990, cond=cond@entry=0x67b9d0, vector=vector@entry=0x0, count=count@entry=0x0) at /var/tmp/portage/x11-libs/libxcb-1.12-r2/work/libxcb-1.12/src/xcb_conn.c:479
#3  0x00007f4df65506df in xcb_wait_for_event (c=0x67b990) at /var/tmp/portage/x11-libs/libxcb-1.12-r2/work/libxcb-1.12/src/xcb_in.c:693
#4  0x00007f4deb963c79 in QXcbEventReader::run (this=0x686050) at qxcbconnection.cpp:1343
#5  0x00007f4df933635c in QThreadPrivate::start (arg=0x686050) at thread/qthread_unix.cpp:368
#6  0x00007f4df6989494 in start_thread (arg=0x7f4de9a2d700) at pthread_create.c:333
#7  0x00007f4df88e894d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4dfcabe840 (LWP 12236)):
[KCrash Handler]
#6  QObject::parent (this=0x0) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:394
#7  QWidget::parentWidget (this=0x0) at ../../include/QtWidgets/../../src/widgets/kernel/qwidget.h:857
#8  QLayout::addChildWidget (this=this@entry=0x7b43a0, w=w@entry=0x0) at kernel/qlayout.cpp:902
#9  0x00007f4df9d2677c in QStackedLayout::insertWidget (this=0x7b43a0, index=3, widget=0x0) at kernel/qstackedlayout.cpp:223
#10 0x00007f4df9d26859 in QStackedLayout::addWidget (this=<optimized out>, widget=<optimized out>) at kernel/qstackedlayout.cpp:203
#11 0x00007f4df9e8c410 in QStackedWidget::addWidget (this=<optimized out>, widget=<optimized out>) at widgets/qstackedwidget.cpp:163
#12 0x000000000042e7f6 in Dragon::MainWindow::toggleLoadView (this=0x6de330) at /var/tmp/portage/kde-apps/dragon-16.12.3/work/dragon-16.12.3/src/app/mainWindow.cpp:439
#13 0x00007f4df94f4d92 in QtPrivate::QSlotObjectBase::call (a=0x7ffca4ec6f80, r=0x6de330, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#14 QMetaObject::activate (sender=sender@entry=0x7b9fc0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x0) at kernel/qobject.cpp:3723
#15 0x00007f4df94f53d7 in QMetaObject::activate (sender=sender@entry=0x7b9fc0, m=m@entry=0x653880 <Dragon::VideoWindow::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x0) at kernel/qobject.cpp:3602
#16 0x0000000000442353 in Dragon::VideoWindow::finished (this=0x7b9fc0) at /var/tmp/portage/kde-apps/dragon-16.12.3/work/dragon-16.12.3_build/src/app/dragon_automoc.dir/moc_videoWindow_KNGIJKFHZ4TKA4.cpp:461
#17 Dragon::VideoWindow::qt_static_metacall (_o=0x7b9fc0, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /var/tmp/portage/kde-apps/dragon-16.12.3/work/dragon-16.12.3_build/src/app/dragon_automoc.dir/moc_videoWindow_KNGIJKFHZ4TKA4.cpp:207
#18 0x00007f4df94f4a57 in QMetaObject::activate (sender=0x776fd0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x0) at kernel/qobject.cpp:3740
#19 0x00007f4df94f53d7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f4dfa47d700 <Phonon::MediaObject::staticMetaObject>, local_signal_index=local_signal_index@entry=6, argv=argv@entry=0x0) at kernel/qobject.cpp:3602
#20 0x00007f4dfa23fa43 in Phonon::MediaObject::finished (this=<optimized out>) at /var/tmp/portage/media-libs/phonon-4.9.1-r1/work/phonon-4.9.1-qt5/phonon/moc_mediaobject.cpp:437
#21 0x00007f4dfa242d95 in Phonon::MediaObject::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /var/tmp/portage/media-libs/phonon-4.9.1-r1/work/phonon-4.9.1-qt5/phonon/moc_mediaobject.cpp:183
#22 0x00007f4df94f5bd1 in QObject::event (this=0x776fd0, e=<optimized out>) at kernel/qobject.cpp:1263
#23 0x00007f4df9cfddbc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x776fd0, e=0x73f740) at kernel/qapplication.cpp:3799
#24 0x00007f4df9d0575e in QApplication::notify (this=0x7ffca4ec7810, receiver=0x776fd0, e=0x73f740) at kernel/qapplication.cpp:3556
#25 0x00007f4df94ce61a in QCoreApplication::notifyInternal2 (receiver=0x776fd0, event=event@entry=0x73f740) at kernel/qcoreapplication.cpp:988
#26 0x00007f4df94d0c9b in QCoreApplication::sendEvent (event=0x73f740, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#27 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x66de10) at kernel/qcoreapplication.cpp:1649
#28 0x00007f4df94d1108 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503
#29 0x00007f4df951b9c3 in postEventSourceDispatch (s=0x6a86b0) at kernel/qeventdispatcher_glib.cpp:276
#30 0x00007f4df41e158d in g_main_dispatch (context=0x7f4de40016f0) at /var/tmp/portage/dev-libs/glib-2.50.3-r1/work/glib-2.50.3/glib/gmain.c:3203
#31 g_main_context_dispatch (context=context@entry=0x7f4de40016f0) at /var/tmp/portage/dev-libs/glib-2.50.3-r1/work/glib-2.50.3/glib/gmain.c:3856
#32 0x00007f4df41e1870 in g_main_context_iterate (context=context@entry=0x7f4de40016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.50.3-r1/work/glib-2.50.3/glib/gmain.c:3929
#33 0x00007f4df41e191c in g_main_context_iteration (context=0x7f4de40016f0, may_block=may_block@entry=1) at /var/tmp/portage/dev-libs/glib-2.50.3-r1/work/glib-2.50.3/glib/gmain.c:3990
#34 0x00007f4df951ba3f in QEventDispatcherGlib::processEvents (this=0x6b4960, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#35 0x00007f4df94cd5ca in QEventLoop::exec (this=this@entry=0x7ffca4ec76c0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#36 0x00007f4df94d4fdc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#37 0x00007f4df97f464c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1633
#38 0x00007f4df9cfdd15 in QApplication::exec () at kernel/qapplication.cpp:2975
#39 0x000000000041aa81 in main (argc=2, argv=<optimized out>) at /var/tmp/portage/kde-apps/dragon-16.12.3/work/dragon-16.12.3/src/app/main.cpp:91

Reported using DrKonqi