[kde] [Bug 379138] New: Kdenlive 17.04 crash when selecting a composite transititon

Tore Eilertsen bugzilla_noreply at kde.org
Sun Apr 23 21:25:30 BST 2017 

https://bugs.kde.org/show_bug.cgi?id=379138

            Bug ID: 379138
           Summary: Kdenlive 17.04 crash when selecting a composite
                    transititon
           Product: kde
           Version: unspecified
          Platform: unspecified
                OS: Linux
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: tore at eilerts1.com
  Target Milestone: ---

Application: kdenlive (17.04.0)

Qt Version: 5.6.1
Frameworks Version: 5.28.0
Operating System: Linux 4.4.0-72-generic x86_64
Distribution: Ubuntu 16.04.2 LTS

-- Information about the crash:
Loaded project from older version and discovered a error with a affine
transition.
Deleted the afiine and added a composite. Kdenlive crashed and I'm now unable
to delete the composite transition as Kdenlive freezes every time I select the
transition.

The crash can be reproduced every time.

-- Backtrace:
Application: Kdenlive (kdenlive), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f96e730c8c0 (LWP 18397))]

Thread 14 (Thread 0x7f967a65c700 (LWP 18455)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f96bdc9195d in ?? () from /usr/lib/x86_64-linux-gnu/mlt/libmltsdl.so
#2  0x00007f96df6bc6ba in start_thread (arg=0x7f967a65c700) at
pthread_create.c:333
#3  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f96a4bb5700 (LWP 18454)):
#0  0x00007f96d89d9518 in ?? () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#1  0x00007f96d89da458 in ?? () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#2  0x00007f96d89da789 in ?? () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#3  0x00007f96d89db01a in ?? () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#4  0x00007f96dbe0b0b7 in pa_mainloop_dispatch () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f96dbe0b4bc in pa_mainloop_iterate () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f96bda2bfeb in ?? () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#7  0x00007f96bd9fe920 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#8  0x00007f96bda080b8 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#9  0x00007f96bda47f59 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#10 0x00007f96df6bc6ba in start_thread (arg=0x7f96a4bb5700) at
pthread_create.c:333
#11 0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f96937fe700 (LWP 18453)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f96e64d30db in ?? () from /usr/lib/x86_64-linux-gnu/libmlt.so.6
#2  0x0000000000742eed in RenderThread::run (this=0x7f967c80abb0) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/monitor/glwidget.cpp:1287
#3  0x00007f96e17c1808 in QThreadPrivate::start (arg=0x7f967c80abb0) at
thread/qthread_unix.cpp:341
#4  0x00007f96df6bc6ba in start_thread (arg=0x7f96937fe700) at
pthread_create.c:333
#5  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f969e03e700 (LWP 18452)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f96bdc9230f in ?? () from /usr/lib/x86_64-linux-gnu/mlt/libmltsdl.so
#2  0x00007f96df6bc6ba in start_thread (arg=0x7f969e03e700) at
pthread_create.c:333
#3  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f96909f9700 (LWP 18414)):
#0  0x00007f96ddc9c3cc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f96ddc9e8bb in g_main_context_prepare () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f96ddc9f2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f96ddc9f49c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f96e19eb37b in QEventDispatcherGlib::processEvents
(this=0x7f966c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f96e1993ffa in QEventLoop::exec (this=this at entry=0x7f96909f8d00,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f96e17bc9e4 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:500
#7  0x00007f96e17c1808 in QThreadPrivate::start (arg=0x7f968014ecc0) at
thread/qthread_unix.cpp:341
#8  0x00007f96df6bc6ba in start_thread (arg=0x7f96909f9700) at
pthread_create.c:333
#9  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f9691ffb700 (LWP 18412)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f96e17c26bb in QWaitConditionPrivate::wait
(time=18446744073709551615, this=0x4e9e9b0) at
thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x4fd9cf0,
time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f96e5dfda8d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f96e5dfe365 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f96e17c1808 in QThreadPrivate::start (arg=0x4fd9c70) at
thread/qthread_unix.cpp:341
#6  0x00007f96df6bc6ba in start_thread (arg=0x7f9691ffb700) at
pthread_create.c:333
#7  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f9693fff700 (LWP 18410)):
#0  0x00007f96ddc9edcc in g_main_context_check () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f96ddc9f330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f96ddc9f49c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f96e19eb37b in QEventDispatcherGlib::processEvents
(this=0x7f96840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f96e1993ffa in QEventLoop::exec (this=this at entry=0x7f9693ffed00,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f96e17bc9e4 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:500
#6  0x00007f96e17c1808 in QThreadPrivate::start (arg=0x7f968c168790) at
thread/qthread_unix.cpp:341
#7  0x00007f96df6bc6ba in start_thread (arg=0x7f9693fff700) at
pthread_create.c:333
#8  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f969d0d3700 (LWP 18409)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f96e17c26bb in QWaitConditionPrivate::wait
(time=18446744073709551615, this=0x2565de0) at
thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x32c61a0,
time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f96e5dfda8d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f96e5dfe365 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f96e17c1808 in QThreadPrivate::start (arg=0x32c6120) at
thread/qthread_unix.cpp:341
#6  0x00007f96df6bc6ba in start_thread (arg=0x7f969d0d3700) at
pthread_create.c:333
#7  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f969ffff700 (LWP 18404)):
#0  0x00007f96e0dbab5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f96ddc9f38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f96ddc9f49c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f96e19eb37b in QEventDispatcherGlib::processEvents
(this=0x7f96940008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f96e1993ffa in QEventLoop::exec (this=this at entry=0x7f969fffece0,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f96e17bc9e4 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:500
#6  0x00007f96e25ab6b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f96e17c1808 in QThreadPrivate::start (arg=0x353a6e0) at
thread/qthread_unix.cpp:341
#8  0x00007f96df6bc6ba in start_thread (arg=0x7f969ffff700) at
pthread_create.c:333
#9  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f96a5bb6700 (LWP 18402)):
#0  __libc_enable_asynccancel () at
../sysdeps/unix/sysv/linux/x86_64/cancellation.S:65
#1  0x00007f96e0dbab52 in poll () at ../sysdeps/unix/syscall-template.S:84
#2  0x00007f96ddc9f38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f96ddc9f49c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f96e19eb37b in QEventDispatcherGlib::processEvents
(this=0x7f96a00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f96e1993ffa in QEventLoop::exec (this=this at entry=0x7f96a5bb5ce0,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f96e17bc9e4 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:500
#7  0x00007f96e25ab6b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f96e17c1808 in QThreadPrivate::start (arg=0x32e7730) at
thread/qthread_unix.cpp:341
#9  0x00007f96df6bc6ba in start_thread (arg=0x7f96a5bb6700) at
pthread_create.c:333
#10 0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f96aede8700 (LWP 18401)):
#0  0x00007f96e0dbab5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f96b675b64c in ?? () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2  0x00007f96df6bc6ba in start_thread (arg=0x7f96aede8700) at
pthread_create.c:333
#3  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f96d11a5700 (LWP 18400)):
#0  0x00007f96e0dbab5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f96ddc9f38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f96ddc9f49c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f96e19eb37b in QEventDispatcherGlib::processEvents
(this=0x7f96c40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f96e1993ffa in QEventLoop::exec (this=this at entry=0x7f96d11a4cd0,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f96e17bc9e4 in QThread::exec (this=this at entry=0x7f96e7434d40
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
thread/qthread.cpp:500
#6  0x00007f96e73c1515 in QDBusConnectionManager::run (this=0x7f96e7434d40
<(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
qdbusconnection.cpp:189
#7  0x00007f96e17c1808 in QThreadPrivate::start (arg=0x7f96e7434d40 <(anonymous
namespace)::Q_QGS__q_manager::innerFunction()::holder>) at
thread/qthread_unix.cpp:341
#8  0x00007f96df6bc6ba in start_thread (arg=0x7f96d11a5700) at
pthread_create.c:333
#9  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f96d3794700 (LWP 18399)):
#0  0x00007f96e0dbab5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f96db9c9c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f96db9cb8d7 in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f96d631cd29 in QXcbEventReader::run (this=0x1e986e0) at
qxcbconnection.cpp:1325
#4  0x00007f96e17c1808 in QThreadPrivate::start (arg=0x1e986e0) at
thread/qthread_unix.cpp:341
#5  0x00007f96df6bc6ba in start_thread (arg=0x7f96d3794700) at
pthread_create.c:333
#6  0x00007f96e0dc682d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f96e730c8c0 (LWP 18397)):
[KCrash Handler]
#6  QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data
(this=<optimized out>) at
../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
#7  qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at
../../include/QtCore/../../src/corelib/global/qglobal.h:1014
#8  QAction::d_func (this=<optimized out>) at kernel/qaction.h:56
#9  QAction::setEnabled (this=0x72000db072000de, b=b at entry=false) at
kernel/qaction.cpp:1021
#10 0x0000000000652ebe in GeometryWidget::GeometryWidget (this=0x4d9d910,
info=0x3476810, clipPos=1850, showRotation=<optimized out>,
useOffset=<optimized out>, parent=<optimized out>) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/effectstack/widgets/geometrywidget.cpp:59
#11 0x000000000062f646 in ParameterContainer::ParameterContainer
(this=<optimized out>, effect=..., info=..., metaInfo=<optimized out>,
parent=0x2e65070) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/effectstack/parametercontainer.cpp:334
#12 0x0000000000611507 in EffectStackEdit::transferParamDesc (this=0x34767e0,
d=..., info=...) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/effectstack/effectstackedit.cpp:140
#13 0x000000000052f139 in TransitionSettings::slotTransitionChanged
(this=this at entry=0x33ed7f0, reinit=reinit at entry=false,
updateCurrent=updateCurrent at entry=false) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/project/transitionsettings.cpp:178
#14 0x000000000052f5ce in TransitionSettings::slotTransitionItemSelected
(this=0x33ed7f0, t=<optimized out>, nextTrack=<optimized out>, p=...,
update=<optimized out>) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/project/transitionsettings.cpp:270
#15 0x0000000000613810 in EffectStackView2::slotTransitionItemSelected
(this=<optimized out>, t=<optimized out>, nextTrack=<optimized out>, p=...,
update=<optimized out>) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/effectstack/effectstackview2.cpp:130
#16 0x00000000008acaf5 in EffectStackView2::qt_static_metacall (_o=<optimized
out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/obj-x86_64-linux-gnu/src/moc_effectstackview2.cpp:340
#17 0x00007f96e19c2b71 in QMetaObject::activate (sender=sender at entry=0x8aee650,
signalOffset=<optimized out>, local_signal_index=local_signal_index at entry=6,
argv=argv at entry=0x7fff50f916f0) at kernel/qobject.cpp:3730
#18 0x00007f96e19c31b7 in QMetaObject::activate (sender=sender at entry=0x8aee650,
m=m at entry=0xc32220 <CustomTrackView::staticMetaObject>,
local_signal_index=local_signal_index at entry=6, argv=argv at entry=0x7fff50f916f0)
at kernel/qobject.cpp:3595
#19 0x0000000000891728 in CustomTrackView::transitionItemSelected
(this=this at entry=0x8aee650, _t1=0x1acfeb40, _t2=5, _t3=...,
_t4=_t4 at entry=false) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/obj-x86_64-linux-gnu/src/moc_customtrackview.cpp:976
#20 0x0000000000566a87 in CustomTrackView::updateTimelineSelection
(this=this at entry=0x8aee650) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/timeline/customtrackview.cpp:834
#21 0x000000000059b96b in CustomTrackView::mousePressEvent (this=0x8aee650,
event=0x7fff50f91e50) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/timeline/customtrackview.cpp:1003
#22 0x00007f96e2fba70f in QWidget::event (this=this at entry=0x8aee650,
event=event at entry=0x7fff50f91e50) at kernel/qwidget.cpp:8744
#23 0x00007f96e30bab2e in QFrame::event (this=0x8aee650, e=0x7fff50f91e50) at
widgets/qframe.cpp:544
#24 0x00007f96e32c672b in QGraphicsView::viewportEvent (this=0x8aee650,
event=0x7fff50f91e50) at graphicsview/qgraphicsview.cpp:2970
#25 0x00007f96e1996012 in
QCoreApplicationPrivate::sendThroughObjectEventFilters
(receiver=receiver at entry=0x92742d0, event=event at entry=0x7fff50f91e50) at
kernel/qcoreapplication.cpp:1126
#26 0x00007f96e2f74ad5 in QApplicationPrivate::notify_helper (this=<optimized
out>, receiver=0x92742d0, e=0x7fff50f91e50) at kernel/qapplication.cpp:3800
#27 0x00007f96e2f7a88e in QApplication::notify (this=<optimized out>,
receiver=0x92742d0, e=0x7fff50f91e50) at kernel/qapplication.cpp:3277
#28 0x00007f96e19962a8 in QCoreApplication::notifyInternal2
(receiver=receiver at entry=0x92742d0, event=event at entry=0x7fff50f91e50) at
kernel/qcoreapplication.cpp:1015
#29 0x00007f96e2f79585 in QCoreApplication::sendEvent (event=<optimized out>,
receiver=<optimized out>) at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:225
#30 QApplicationPrivate::sendMouseEvent (receiver=receiver at entry=0x92742d0,
event=event at entry=0x7fff50f91e50, alienWidget=alienWidget at entry=0x92742d0,
nativeWidget=0x8aee650, buttonDown=buttonDown at entry=0x7f96e349acb0
<qt_button_down>, lastMouseReceiver=..., spontaneous=true) at
kernel/qapplication.cpp:2775
#31 0x00007f96e2fd44b0 in QWidgetWindow::handleMouseEvent
(this=this at entry=0x8aee490, event=event at entry=0x7fff50f92250) at
kernel/qwidgetwindow.cpp:603
#32 0x00007f96e2fd6df3 in QWidgetWindow::event (this=0x8aee490,
event=0x7fff50f92250) at kernel/qwidgetwindow.cpp:233
#33 0x00007f96e2f74afc in QApplicationPrivate::notify_helper (this=<optimized
out>, receiver=0x8aee490, e=0x7fff50f92250) at kernel/qapplication.cpp:3804
#34 0x00007f96e2f7a036 in QApplication::notify (this=0x7fff50f92730,
receiver=0x8aee490, e=0x7fff50f92250) at kernel/qapplication.cpp:3561
#35 0x00007f96e19962a8 in QCoreApplication::notifyInternal2
(receiver=receiver at entry=0x8aee490, event=event at entry=0x7fff50f92250) at
kernel/qcoreapplication.cpp:1015
#36 0x00007f96e1ce4fc0 in QCoreApplication::sendSpontaneousEvent
(event=0x7fff50f92250, receiver=0x8aee490) at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#37 QGuiApplicationPrivate::processMouseEvent (e=0x1a93b5e0) at
kernel/qguiapplication.cpp:1877
#38 0x00007f96e1ce6b55 in QGuiApplicationPrivate::processWindowSystemEvent
(e=e at entry=0x1a93b5e0) at kernel/qguiapplication.cpp:1661
#39 0x00007f96e1cc478b in QWindowSystemInterface::sendWindowSystemEvents
(flags=...) at kernel/qwindowsysteminterface.cpp:648
#40 0x00007f96d6352d40 in userEventSourceDispatch (source=<optimized out>) at
eventdispatchers/qeventdispatcher_glib.cpp:70
#41 0x00007f96ddc9f197 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007f96ddc9f3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007f96ddc9f49c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007f96e19eb35f in QEventDispatcherGlib::processEvents (this=0x1eebeb0,
flags=...) at kernel/qeventdispatcher_glib.cpp:417
#45 0x00007f96e1993ffa in QEventLoop::exec (this=this at entry=0x7fff50f925f0,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#46 0x00007f96e199c6bc in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:1285
#47 0x00007f96e1cdc7cc in QGuiApplication::exec () at
kernel/qguiapplication.cpp:1607
#48 0x00007f96e2f71ac5 in QApplication::exec () at kernel/qapplication.cpp:2979
#49 0x000000000048ff65 in main (argc=1, argv=<optimized out>) at
/build/kdenlive-ROJqFx/kdenlive-17.04.0~ubuntu16.04.1/src/main.cpp:158

Reported using DrKonqi

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