Created attachment 105541 [details]
Backtrace

Application: kdenlive (17.04.1)

Qt Version: 5.7.1
Frameworks Version: 5.33.0
Operating System: Linux 4.8.0-51-generic x86_64
Distribution: KDE neon User Edition 5.9

-- Information about the crash:
- What I was doing when the application crashed:
I just exit Kdenlive and while the program exits, it seems to crash as it is exiting.

I am running KDE neon with an Nvidia GPU and latest nvidia drivers.

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 0x7f0cf50958c0 (LWP 32300))]

Thread 18 (Thread 0x7f0c82529700 (LWP 32648)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cc59538ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0c82529700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f0c82d2a700 (LWP 32647)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cc59538ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0c82d2a700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f0c8352b700 (LWP 32646)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cc59538ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0c8352b700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f0c83d2c700 (LWP 32645)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cc59538ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0c83d2c700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f0c9e079700 (LWP 32644)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cc59538ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0c9e079700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f0caed62700 (LWP 32643)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cc59538ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0caed62700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f0c81d28700 (LWP 32642)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cc59538ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0c81d28700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f0c81527700 (LWP 32641)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cc59538ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0c81527700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f0c80d26700 (LWP 32640)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cc59538ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0c80d26700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f0c9c98e700 (LWP 32320)):
#0  0x00007f0ceeb5fb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0ce7a7738c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0ce7a7749c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0cef79c75b in QEventDispatcherGlib::processEvents (this=0x7f0c700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f0cef7470ba in QEventLoop::exec (this=this@entry=0x7f0c9c98dd00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f0cef576f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f0cef57bb48 in QThreadPrivate::start (arg=0x7f0c741625a0) at thread/qthread_unix.cpp:368
#7  0x00007f0ced1c46ba in start_thread (arg=0x7f0c9c98e700) at pthread_create.c:333
#8  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f0c9d56f700 (LWP 32319)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cef57c9fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x5633de0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5836060, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f0cf3b9347d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f0cf3b93d55 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f0cef57bb48 in QThreadPrivate::start (arg=0x5835fe0) at thread/qthread_unix.cpp:368
#6  0x00007f0ced1c46ba in start_thread (arg=0x7f0c9d56f700) at pthread_create.c:333
#7  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f0c9f07b700 (LWP 32316)):
#0  0x00007f0ce7abba79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f0ce7a76dcc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0ce7a77330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0ce7a7749c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0cef79c75b in QEventDispatcherGlib::processEvents (this=0x7f0c900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f0cef7470ba in QEventLoop::exec (this=this@entry=0x7f0c9f07ad00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f0cef576f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#7  0x00007f0cef57bb48 in QThreadPrivate::start (arg=0x7f0c8c173fa0) at thread/qthread_unix.cpp:368
#8  0x00007f0ced1c46ba in start_thread (arg=0x7f0c9f07b700) at pthread_create.c:333
#9  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f0c9f87c700 (LWP 32315)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0cef57c9fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x56c2b30) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5686ab0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f0cf3b9347d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f0cf3b93d55 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f0cef57bb48 in QThreadPrivate::start (arg=0x5686a30) at thread/qthread_unix.cpp:368
#6  0x00007f0ced1c46ba in start_thread (arg=0x7f0c9f87c700) at pthread_create.c:333
#7  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f0cae541700 (LWP 32308)):
#0  0x00007ffe26b17937 in ?? ()
#1  0x00007ffe26b17bd6 in clock_gettime ()
#2  0x00007f0ceeb79c86 in __GI___clock_gettime (clock_id=clock_id@entry=1, tp=tp@entry=0x7f0cae540a40) at ../sysdeps/unix/clock_gettime.c:115
#3  0x00007f0cef621241 in qt_clock_gettime (ts=0x7f0cae540a40, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:109
#4  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:164
#5  qt_gettime () at tools/qelapsedtimer_unix.cpp:173
#6  0x00007f0cef79a3d9 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f0ca4002ed0) at kernel/qtimerinfo_unix.cpp:91
#7  0x00007f0cef79a945 in QTimerInfoList::timerWait (this=0x7f0ca4002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:388
#8  0x00007f0cef79bd0e in timerSourcePrepareHelper (timeout=0x7f0cae540b14, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:132
#9  timerSourcePrepare (source=<optimized out>, timeout=0x7f0cae540b14) at kernel/qeventdispatcher_glib.cpp:165
#10 0x00007f0ce7a7691d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f0ce7a772bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f0ce7a7749c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f0cef79c75b in QEventDispatcherGlib::processEvents (this=0x7f0ca40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#14 0x00007f0cef7470ba in QEventLoop::exec (this=this@entry=0x7f0cae540ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#15 0x00007f0cef576f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#16 0x00007f0cf096abf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007f0cef57bb48 in QThreadPrivate::start (arg=0x3fc4890) at thread/qthread_unix.cpp:368
#18 0x00007f0ced1c46ba in start_thread (arg=0x7f0cae541700) at pthread_create.c:333
#19 0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f0cafd63700 (LWP 32306)):
#0  0x00007f0ceeb5fb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0ce7a7738c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0ce7a7749c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0cef79c75b in QEventDispatcherGlib::processEvents (this=0x7f0ca80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f0cef7470ba in QEventLoop::exec (this=this@entry=0x7f0cafd62ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f0cef576f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f0cf096abf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f0cef57bb48 in QThreadPrivate::start (arg=0x417d560) at thread/qthread_unix.cpp:368
#8  0x00007f0ced1c46ba in start_thread (arg=0x7f0cafd63700) at pthread_create.c:333
#9  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f0cb542c700 (LWP 32304)):
#0  0x00007f0ceeb5fb5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0cb94e464c in ?? () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2  0x00007f0ced1c46ba in start_thread (arg=0x7f0cb542c700) at pthread_create.c:333
#3  0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f0cd3fff700 (LWP 32303)):
#0  0x00007f0ceeb5b69d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f0ce7aba6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0ce7a76e74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0ce7a77330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0ce7a7749c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f0cef79c75b in QEventDispatcherGlib::processEvents (this=0x7f0ccc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f0cef7470ba in QEventLoop::exec (this=this@entry=0x7f0cd3ffecd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f0cef576f64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#8  0x00007f0cf50f2735 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f0cef57bb48 in QThreadPrivate::start (arg=0x7f0cf5166d60) at thread/qthread_unix.cpp:368
#10 0x00007f0ced1c46ba in start_thread (arg=0x7f0cd3fff700) at pthread_create.c:333
#11 0x00007f0ceeb6b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f0cf50958c0 (LWP 32300)):
[KCrash Handler]
#6  0x00007f0cc7d11490 in ?? ()
#7  0x00007f0cf427915a in mlt_consumer_purge () from /usr/lib/x86_64-linux-gnu/libmlt.so.6
#8  0x0000000000858915 in Render::stop (this=0x4021110) at /workspace/build/src/renderer.cpp:680
#9  0x000000000073ec45 in Monitor::~Monitor (this=0x388ffe0, __in_chrg=<optimized out>) at /workspace/build/src/monitor/monitor.cpp:364
#10 0x000000000073ecd9 in Monitor::~Monitor (this=0x388ffe0, __in_chrg=<optimized out>) at /workspace/build/src/monitor/monitor.cpp:372
#11 0x000000000083f516 in MainWindow::~MainWindow (this=this@entry=0x2ffa630, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /workspace/build/src/mainwindow.cpp:785
#12 0x000000000083f659 in MainWindow::~MainWindow (this=0x2ffa630, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /workspace/build/src/mainwindow.cpp:790
#13 0x00007f0cef774dd0 in QObject::event (this=this@entry=0x2ffa630, e=e@entry=0x2972650) at kernel/qobject.cpp:1254
#14 0x00007f0cf01e612b in QWidget::event (this=this@entry=0x2ffa630, event=event@entry=0x2972650) at kernel/qwidget.cpp:9225
#15 0x00007f0cf02e3e3b in QMainWindow::event (this=this@entry=0x2ffa630, event=event@entry=0x2972650) at widgets/qmainwindow.cpp:1543
#16 0x00007f0cf2c56157 in KMainWindow::event (this=this@entry=0x2ffa630, ev=ev@entry=0x2972650) at /workspace/build/src/kmainwindow.cpp:867
#17 0x00007f0cf2c9b2e5 in KXmlGuiWindow::event (this=0x2ffa630, ev=0x2972650) at /workspace/build/src/kxmlguiwindow.cpp:119
#18 0x00007f0cf019eecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x2ffa630, e=0x2972650) at kernel/qapplication.cpp:3799
#19 0x00007f0cf01a68c6 in QApplication::notify (this=0x7ffe26aa86f0, receiver=0x2ffa630, e=0x2972650) at kernel/qapplication.cpp:3556
#20 0x00007f0cef7490c8 in QCoreApplication::notifyInternal2 (receiver=0x2ffa630, event=event@entry=0x2972650) at kernel/qcoreapplication.cpp:988
#21 0x00007f0cef74b78b in QCoreApplication::sendEvent (event=0x2972650, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=52, data=0x2948b40) at kernel/qcoreapplication.cpp:1649
#23 0x00007f0cef74bbf8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=52) at kernel/qcoreapplication.cpp:1503
#24 0x00007f0cef74f709 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1268
#25 0x0000000000490eb5 in main (argc=1, argv=<optimized out>) at /workspace/build/src/main.cpp:158

Possible duplicates by query: bug 378763, bug 378469.

Report to https://bugs.kde.org/