Bug 386395

Application: kdenlive (17.11.70)
 (Compiled from sources)
Qt Version: 5.9.1
Frameworks Version: 5.38.0
Operating System: Linux 4.13.0-16-generic x86_64
Distribution: Ubuntu 17.10

-- Information about the crash:
- Custom settings of the application:
Built with Release build type and "-flto". 
Built from commit 09d696b9c5bce7659ac6be5ed3f6fe359fb034f5

The crash can be reproduced every time.

-- Backtrace:
Application: Kdenlive (kdenlive), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcd27cac900 (LWP 17153))]

Thread 8 (Thread 0x7fccd943d700 (LWP 17161)):
#0  0x00007fcd1e470072 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f724e36660) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fcd1e470072 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f724e36610, cond=0x55f724e36638) at pthread_cond_wait.c:502
#2  0x00007fcd1e470072 in __pthread_cond_wait (cond=0x55f724e36638, mutex=0x55f724e36610) at pthread_cond_wait.c:655
#3  0x00007fcd206736cb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fcd2066bd6b in QSemaphore::acquire(int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x000055f7227749e4 in onThreadCreate(mlt_properties_s*, GLWidget*, RenderThread**, int*, void* (*)(void*), void*) ()
#6  0x00007fcd2695794e in mlt_events_fire (self=self@entry=0x55f725ab4220, id=id@entry=0x7fcd269694a4 "consumer-thread-create") at mlt_events.c:216
#7  0x00007fcd26961304 in mlt_thread_create (function=0x7fcd2695fee0 <consumer_read_ahead_thread>, self=0x55f725ab4220) at mlt_consumer.c:1783
#8  0x00007fcd26961304 in consumer_read_ahead_start (self=0x55f725ab4220) at mlt_consumer.c:1128
#9  0x00007fcd26961304 in mlt_consumer_rt_frame (self=self@entry=0x55f725ab4220) at mlt_consumer.c:1566
#10 0x00007fcce4e9ac13 in consumer_thread (arg=0x55f725ab4220) at consumer_sdl_audio.c:528
#11 0x00007fcd1e4697fc in start_thread (arg=0x7fccd943d700) at pthread_create.c:465
#12 0x00007fcd27846b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fcce0059700 (LWP 17160)):
#0  0x00007fcd1e473afd in __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fcd1e46c21a in __GI___pthread_mutex_lock (mutex=0x7fcd19f57930) at ../nptl/pthread_mutex_lock.c:115
#2  0x00007fcd19cd36fc in  () at /usr/lib/nvidia-387/libGL.so.1
#3  0x00007fcd19cd8631 in  () at /usr/lib/nvidia-387/libGL.so.1
#4  0x00007fcd19cd8b48 in  () at /usr/lib/nvidia-387/libGL.so.1
#5  0x00007fcd15392102 in  () at /usr/lib/nvidia-387/tls/libnvidia-tls.so.387.22
#6  0x00007fcd10e2be41 in pa_read () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-10.0.so
#7  0x00007fcd185d39fe in pa_mainloop_prepare () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#8  0x00007fcd185d4470 in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#9  0x00007fcd185d4530 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#10 0x00007fccedd776ef in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#11 0x00007fccedd3b75c in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#12 0x00007fccedd91999 in  () at /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#13 0x00007fcd1e4697fc in start_thread (arg=0x7fcce0059700) at pthread_create.c:465
#14 0x00007fcd27846b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fccdb7fe700 (LWP 17158)):
#0  0x00007fcd18aad5b9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fcd18a67cf6 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcd18a681f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcd18a6827c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcd208a849b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fcd2084de3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fcd2066d3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fcd2231ef45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fcd2067229d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fcd1e4697fc in start_thread (arg=0x7fccdb7fe700) at pthread_create.c:465
#10 0x00007fcd27846b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fccdbfff700 (LWP 17157)):
#0  0x00007fcd1e47064b in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fccdbffeb50, expected=0, futex_word=0x55f724fa0000) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fcd1e47064b in __pthread_cond_wait_common (abstime=0x7fccdbffec10, mutex=0x55f724f9ffb0, cond=0x55f724f9ffd8) at pthread_cond_wait.c:533
#2  0x00007fcd1e47064b in __pthread_cond_timedwait (cond=0x55f724f9ffd8, mutex=0x55f724f9ffb0, abstime=0x7fccdbffec10) at pthread_cond_wait.c:667
#3  0x00007fcd20673588 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fcd2066e7cc in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fcd2067229d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fcd1e4697fc in start_thread (arg=0x7fccdbfff700) at pthread_create.c:465
#7  0x00007fcd27846b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fcce19f2700 (LWP 17156)):
#0  0x00007fcd18a676ed in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fcd18a6809b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcd18a6827c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcd208a849b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fcd2084de3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fcd2066d3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fcd2231ef45 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fcd2067229d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fcd1e4697fc in start_thread (arg=0x7fcce19f2700) at pthread_create.c:465
#9  0x00007fcd27846b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fcd08f61700 (LWP 17155)):
#0  0x00007fcd1e473b9a in __lll_unlock_wake () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:371
#1  0x00007fcd1e46d9af in __pthread_mutex_unlock_usercnt (decr=1, mutex=0x7fcd19f57930) at pthread_mutex_unlock.c:55
#2  0x00007fcd1e46d9af in __GI___pthread_mutex_unlock (mutex=0x7fcd19f57930) at pthread_mutex_unlock.c:347
#3  0x00007fcd19cd3415 in  () at /usr/lib/nvidia-387/libGL.so.1
#4  0x00007fcd19cd8b48 in  () at /usr/lib/nvidia-387/libGL.so.1
#5  0x00007fcd15392102 in  () at /usr/lib/nvidia-387/tls/libnvidia-tls.so.387.22
#6  0x00007fcd18aac280 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fcd18a67c4b in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fcd18a68110 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fcd18a6827c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fcd208a849b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fcd2084de3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fcd2066d3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fcd22d87e45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#14 0x00007fcd2067229d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fcd1e4697fc in start_thread (arg=0x7fcd08f61700) at pthread_create.c:465
#16 0x00007fcd27846b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fcd0ad4b700 (LWP 17154)):
#0  0x00007fcd2783a901 in __GI___poll (fds=0x7fcd0ad4abb8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fcd1818f747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fcd1819153a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fcd0d8d9f09 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fcd2067229d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fcd1e4697fc in start_thread (arg=0x7fcd0ad4b700) at pthread_create.c:465
#6  0x00007fcd27846b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fcd27cac900 (LWP 17153)):
[KCrash Handler]
#6  0x00007fcd277690bb in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007fcd2776af5d in __GI_abort () at abort.c:90
#8  0x00007fcd2065d107 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fcd26042787 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007fcd26043755 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fcd2604437a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007fcd20e1ad35 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007fcd260b7d05 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007fcd2195546c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fcd2195cd34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fcd2084fde8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fcd20e0fe5f in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007fcd20e10a9d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007fcd20de8cab in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#20 0x00007fcd0d93c5a0 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#21 0x00007fcd18a67fb7 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fcd18a681f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fcd18a6827c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fcd208a847f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fcd2084de3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007fcd20856da4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x000055f72252874c in main ()

Reported using DrKonqi