Thread 9 (Thread 0x7f6fe0887700 (LWP 3483)):
[KCrash Handler]
#6 0x00007f702185004f in raise () at /usr/lib/libc.so.6
#7 0x00007f702185147a in abort () at /usr/lib/libc.so.6
#8 0x00007f70224f14f1 in qt_message_fatal (context=..., message=<synthetic pointer>...) at global/qlogging.cpp:1682
#9 0x00007f70224f14f1 in QMessageLogger::fatal(char const*, ...) const (this=this@entry=0x7f6fe0886190, msg=msg@entry=0x7f702278f2b0 "ASSERT: \"%s\" in file %s, line %d") at global/qlogging.cpp:793
#10 0x00007f70224ec9be in qt_assert(char const*, char const*, int) (assertion=<optimized out>, file=<optimized out>, line=<optimized out>) at global/qglobal.cpp:3081
#11 0x0000000000846eef in QOpenGLFunctions::glGetError() (this=0x7f6fc4003580) at /usr/include/qt/QtGui/qopenglfunctions.h:828
#12 0x000000000083f911 in uploadTextures(QOpenGLContext*, SharedFrame const&, unsigned int*) (context=0x7f6fd012fb70, frame=..., texture=0x7f6fd2249318) at /home/elvis/dev/kde/src/kdenlive/src/monitor/glwidget.cpp:342
#13 0x00000000008456ff in FrameRenderer::showFrame(Mlt::Frame) (this=0x7f6fd22492e0, frame=<incomplete type>) at /home/elvis/dev/kde/src/kdenlive/src/monitor/glwidget.cpp:1323
#14 0x00000000009ed138 in FrameRenderer::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=0x7f6fd22492e0, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0x7f6fcc013950) at src/kdenlive_automoc.dir/moc_glwidget_X5PTVTJFKEOFU6.cpp:777
#15 0x00007f7022711f29 in QObject::event(QEvent*) (this=0x7f6fd22492e0, e=<optimized out>) at kernel/qobject.cpp:1263
#16 0x00007f7025dd035c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x7f6fd22492e0, e=0x7f6fcc0139b0) at kernel/qapplication.cpp:3799
#17 0x00007f7025dd7ad1 in QApplication::notify(QObject*, QEvent*) (this=0x7ffc523db570, receiver=0x7f6fd22492e0, e=0x7f6fcc0139b0) at kernel/qapplication.cpp:3556
#18 0x00007f70226e58e0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x7f6fd22492e0, event=event@entry=0x7f6fcc0139b0) at kernel/qcoreapplication.cpp:988
#19 0x00007f70226e806d in QCoreApplication::sendEvent(QObject*, QEvent*) (event=0x7f6fcc0139b0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#20 0x00007f70226e806d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x7f6fd2249350) at kernel/qcoreapplication.cpp:1649
#21 0x00007f70226e84d8 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503
#22 0x00007f7022739eb3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x7f6fc40012d0) at kernel/qeventdispatcher_glib.cpp:276
#23 0x00007f701c82b587 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#24 0x00007f701c82b7f0 in () at /usr/lib/libglib-2.0.so.0
#25 0x00007f701c82b89c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#26 0x00007f702273a2bf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f6fc40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#27 0x00007f70226e3d3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f6fe0886d80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#28 0x00007f7022506063 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:507
#29 0x00007f702250acf8 in QThreadPrivate::start(void*) (arg=0x7f6fd22492e0) at thread/qthread_unix.cpp:368
#30 0x00007f702008f454 in start_thread () at /usr/lib/libpthread.so.0
#31 0x00007f70219057df in clone () at /usr/lib/libc.so.6

Same Error with appimage