https://bugs.kde.org/show_bug.cgi?id=364082

--- Comment #5 from Yueqi Li <lionghosts...@gmail.com> ---
Removing cache at "/home/leo/.cache/kdenlive-thumbs.kcache"
 // / processing file open
 // / processing file open: validate
klauncher not running... launching kdeinit
kdeinit5: preparing to launch 'libkdeinit5_klauncher'
kdeinit5: Launched KLauncher, pid = 2422, result = 0
Connecting to deprecated signal
QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
kdeinit5: opened connection to :0
kdeinit5: Got EXEC_NEW '/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/file.so'
from launcher.
kdeinit5: preparing to launch
'/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/file.so'
OpenGL vendor:  "Intel Open Source Technology Center"
OpenGL renderer:  "Mesa DRI Intel(R) Haswell Mobile "
OpenGL ARG_SYNC:  true
OpenGL OpenGLES:  false
[New Thread 0x7fffa2cd7700 (LWP 2425)]

Thread 1 "kdenlive" received signal SIGSEGV, Segmentation fault.
0x00007ffff2457630 in QOpenGLContext::shareGroup() const ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe2cb5700 (LWP 2411)]
[New Thread 0x7fffd997c700 (LWP 2412)]
[New Thread 0x7fffd917b700 (LWP 2413)]
[New Thread 0x7fffd897a700 (LWP 2414)]
[New Thread 0x7fffcbfff700 (LWP 2415)]
[Thread 0x7fffd897a700 (LWP 2414) exited]
[New Thread 0x7fffd897a700 (LWP 2416)]
[New Thread 0x7fffab0f6700 (LWP 2417)]
[New Thread 0x7fffaa0f5700 (LWP 2418)]
[New Thread 0x7fffa9818700 (LWP 2419)]
Removing cache at "/home/leo/.cache/kdenlive-thumbs.kcache"
 // / processing file open
 // / processing file open: validate
klauncher not running... launching kdeinit
kdeinit5: preparing to launch 'libkdeinit5_klauncher'
kdeinit5: Launched KLauncher, pid = 2422, result = 0
Connecting to deprecated signal
QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
kdeinit5: opened connection to :0
kdeinit5: Got EXEC_NEW '/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/file.so'
from launcher.
kdeinit5: preparing to launch
'/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/file.so'
OpenGL vendor:  "Intel Open Source Technology Center"
OpenGL renderer:  "Mesa DRI Intel(R) Haswell Mobile "
OpenGL ARG_SYNC:  true
OpenGL OpenGLES:  false
[New Thread 0x7fffa2cd7700 (LWP 2425)]

Thread 1 "kdenlive" received signal SIGSEGV, Segmentation fault.
0x00007ffff2457630 in QOpenGLContext::shareGroup() const ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
(gdb) thread apply all bt

Thread 11 (Thread 0x7fffa2cd7700 (LWP 2425)):
#0  0x00007ffff14ffe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fffee42531c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffee42542c in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff2135a9b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff20dcdea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff1ef98a4 in QThread::exec() ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff1efe84e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fffefe2d6fa in start_thread (arg=0x7fffa2cd7700)
    at pthread_create.c:333
#8  0x00007ffff150bb5d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fffa9818700 (LWP 2419)):
#0  0x00007ffff14ffe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fffee42531c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffee42542c in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0

#3  0x00007ffff2135a7f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff20dcdea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff1ef98a4 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff2caa3c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007ffff1efe84e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fffefe2d6fa in start_thread (arg=0x7fffa9818700) at
pthread_create.c:333
#9  0x00007ffff150bb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fffaa0f5700 (LWP 2418)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007ffff1effa26 in QWaitCondition::wait(QMutex*, unsigned long) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007ffff1efb4d3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007ffff1efe84e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fffefe2d6fa in start_thread (arg=0x7fffaa0f5700) at
pthread_create.c:333
#5  0x00007ffff150bb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fffab0f6700 (LWP 2417)):
#0  0x00007ffff14ffe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fffee42531c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffee42542c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff2135a7f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff20dcdea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff1ef98a4 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff2caa3c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007ffff1efe84e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fffefe2d6fa in start_thread (arg=0x7fffab0f6700) at
pthread_create.c:333
#9  0x00007ffff150bb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fffd897a700 (LWP 2416)):
#0  0x00007ffff14ffe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fffb716964c in ?? () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2  0x00007fffefe2d6fa in start_thread (arg=0x7fffd897a700) at
pthread_create.c:333
#3  0x00007ffff150bb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fffcbfff700 (LWP 2415)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fffee469cca in g_cond_wait_until () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffee3f9929 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fffee3f9f4b in g_async_queue_timeout_pop () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fffee44c59a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fffee44bb45 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fffefe2d6fa in start_thread (arg=0x7fffcbfff700) at
pthread_create.c:333
#7  0x00007ffff150bb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fffd917b700 (LWP 2413)):
#0  0x00007ffff14ffe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fffee42531c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffee4256a2 in g_main_loop_run () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fffe0739906 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fffee44bb45 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fffefe2d6fa in start_thread (arg=0x7fffd917b700) at
pthread_create.c:333
#6  0x00007ffff150bb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fffd997c700 (LWP 2412)):
#0  0x00007ffff14ffe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fffee42531c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffee42542c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fffee425469 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fffee44bb45 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fffefe2d6fa in start_thread (arg=0x7fffd997c700) at
pthread_create.c:333
#6  0x00007ffff150bb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fffe2cb5700 (LWP 2411)):
#0  0x00007ffff14ffe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fffec18fc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fffec1918d7 in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fffe5007629 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007ffff1efe84e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fffefe2d6fa in start_thread (arg=0x7fffe2cb5700) at
pthread_create.c:333
#6  0x00007ffff150bb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fffe5a9d8c0 (LWP 2404)):
#0  0x00007ffff2457630 in QOpenGLContext::shareGroup() const () from
/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#1  0x00007ffff26fc740 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#2  0x00007ffff26fc93b in QOpenGLFunctions::initializeOpenGLFunctions() () from
/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#3  0x00000000006ed016 in ?? ()
#4  0x0000000000845ddd in ?? ()
#5  0x00007ffff210dfca in QMetaObject::activate(QObject*, int, int, void**) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff64c05fd in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007ffff210dfca in QMetaObject::activate(QObject*, int, int, void**) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007ffff6475b31 in QSGRenderContext::initialize(QOpenGLContext*) () from
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007ffff6490cef in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007ffff6491aa6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007ffff242a2f5 in QWindow::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007ffff64cb871 in QQuickWindow::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007ffff369405c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007ffff3699516 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007ffff20df62b in QCoreApplication::notifyInternal(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007ffff24224ec in
QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#17 0x00007ffff242325d in
QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007ffff2406f38 in
QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007fffe5039070 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#20 0x00007fffee425127 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fffee425380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fffee42542c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007ffff2135a7f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00000000004be00e in ?? ()
#25 0x000000000050cf0a in ?? ()
#26 0x000000000050ee73 in ?? ()
#27 0x000000000082bb39 in ?? ()
#28 0x00007ffff210dfca in QMetaObject::activate(QObject*, int, int, void**) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007ffff4c862e2 in KRecentFilesAction::urlSelected(QUrl const&) () from
/usr/lib/x86_64-linux-gnu/libKF5ConfigWidgets.so.5
#30 0x00007ffff4c86cb8 in ?? () from
/usr/lib/x86_64-linux-gnu/libKF5ConfigWidgets.so.5
#31 0x00007ffff4c8707b in ?? () from
/usr/lib/x86_64-linux-gnu/libKF5ConfigWidgets.so.5
#32 0x00007ffff210dfca in QMetaObject::activate(QObject*, int, int, void**) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007ffff3e83ddf in KSelectAction::triggered(QAction*) () from
/usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#34 0x00007ffff3e86ebd in KSelectAction::actionTriggered(QAction*) () from
/usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#35 0x00007ffff210de4f in QMetaObject::activate(QObject*, int, int, void**) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007ffff368d95f in QActionGroup::triggered(QAction*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007ffff368e5d9 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5

#38 0x00007ffff210dfca in QMetaObject::activate(QObject*, int, int, void**) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007ffff368a412 in QAction::triggered(bool) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#40 0x00007ffff368c898 in QAction::activate(QAction::ActionEvent) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x000000000050ec19 in ?? ()
#42 0x000000000050f565 in ?? ()
#43 0x000000000082bad5 in ?? ()
#44 0x00007ffff210eea1 in QObject::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x00007ffff369405c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x00007ffff3699516 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#47 0x00007ffff20df62b in QCoreApplication::notifyInternal(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00007ffff20e1a26 in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007ffff2135673 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#50 0x00007fffee425127 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#51 0x00007fffee425380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#52 0x00007fffee42542c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#53 0x00007ffff2135a7f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#54 0x00007ffff20dcdea in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007ffff20e4e8c in QCoreApplication::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x0000000000485b82 in ?? ()
#57 0x00007ffff1425830 in __libc_start_main (main=0x484e90, argc=1,
argv=0x7fffffffdea8, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffffffde98)
    at ../csu/libc-start.c:291
#58 0x00000000004861b9 in _start ()

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