Bug 407844

Summary: Kdenlive crashes when opening a particular .kdenlive file
Product: [Applications] kdenlive Reporter: Andrei Rybak <rybak.a.v>
Component: Rendering & ExportAssignee: Jean-Baptiste Mardelle <jb>
Status: RESOLVED FIXED    
Severity: crash CC: fritzibaby
Priority: NOR Flags: fritzibaby: Brainstorm+
Version First Reported In: 19.04.1   
Target Milestone: ---   
Platform: Kubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Kdenlive file which causes the crash

Description Andrei Rybak 2019-05-22 20:58:53 UTC 
Created attachment 120258 [details]
Kdenlive file which causes the crash

Originally reported as https://bugs.kde.org/show_bug.cgi?id=407539 for an outdated version of Kdenlive.
The same crash is observed on 19.04.1

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 18.10 64-bit
(available in About System)
KDE Plasma Version: 5.13.5
KDE Frameworks Version: 5.50.0
Qt Version: 5.11.1
---

Below is the output generated by crash report assistant.
---
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 0x7fe5c5fc46c0 (LWP 9137))]

Thread 15 (Thread 0x7fe57df02700 (LWP 9157)):
#0  0x00007fe5cb96e64b in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe5cb96edf0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fe57e703700 (LWP 9156)):
#0  __GI___libc_read (fd=24, buf=0x7fe57e702a40, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fe5cb9b4180 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5cb96e91f in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5cb96edf0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fe57f7bf700 (LWP 9153)):
#0  0x00007fe5cb9b5524 in g_mutex_unlock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe5cb96ee06 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d2205396 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fe58cacf700 (LWP 9152)):
#0  0x00007fe5d0bce6d9 in __GI___poll (fds=0x7fe578003160, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe5cb96ee46 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d1f801f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fe58d2d5700 (LWP 9151)):
#0  0x00007fe5cb96bd09 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe5cb96e74a in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5cb96edf0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe5d2205396 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fe58e57e700 (LWP 9150)):
#0  __GI___libc_read (fd=18, buf=0x7fe58e57da20, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fe5cb9b4180 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5cb96e91f in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5cb96edf0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe5d1f801f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fe58f7bf700 (LWP 9149)):
#0  0x00007fe5d0bce6d9 in __GI___poll (fds=0x7fe588003160, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe5cb96ee46 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d1f801f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fe59ca71700 (LWP 9148)):
#0  0x00007fe5d0bce6d9 in __GI___poll (fds=0x7fe594003940, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe5cb96ee46 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d1f801f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fe59d272700 (LWP 9147)):
#0  futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fe59d271b10, expected=0, futex_word=0x5589aa105654) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fe59d271bd0, mutex=0x5589aa105600, cond=0x5589aa105628) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x5589aa105628, mutex=0x5589aa105600, abstime=0x7fe59d271bd0) at pthread_cond_wait.c:667
#3  0x00007fe5d108531c in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe5d107d182 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#7  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fe59eb3c700 (LWP 9143)):
#0  0x00007fe5d127d8cf in QTimerInfoList::timerWait(timespec&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fe5d127eede in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fe5cb96e379 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5cb96ed7b in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe5d1f801f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fe5c0bfe700 (LWP 9142)):
#0  0x00007fe5d0bce6d9 in __GI___poll (fds=0x7fe5b0004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe5cb96ee46 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe5d127f15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe5d107b0b6 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe5d2cc0545 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fe5c177c700 (LWP 9141)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5589a7fbc57c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5589a7fbc528, cond=0x5589a7fbc550) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5589a7fbc550, mutex=0x5589a7fbc528) at pthread_cond_wait.c:655
#3  0x00007fe5c1e48ebb in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe5c1e48c27 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fe5c3b33700 (LWP 9140)):
#0  0x00007fe5d0bce6d9 in __GI___poll (fds=0x7fe5c3b32b78, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe5cb901917 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fe5cb90353a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fe5c5661159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fe5d1084c87 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fe5c5fbd700 (LWP 9139)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fe5cf553090) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5589a7ef8e10, cond=0x7fe5cf553068) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fe5cf553068, mutex=0x5589a7ef8e10) at pthread_cond_wait.c:655
#3  0x00007fe5d0eef8ac in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007fe5cea81832 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#5  0x00007fe5cea81949 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebKit.so.5
#6  0x00007fe5d0ef56af in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#7  0x00007fe5cf898164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fe5d0bdadef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fe5c5fc46c0 (LWP 9137)):
[KCrash Handler]
#6  0x00007fe5d322e308 in QDomNode::QDomNode(QDomNodePrivate*) () from /usr/lib/x86_64-linux-gnu/libQt5Xml.so.5
#7  0x00007fe5d323489e in QDomNodeList::item(int) const () from /usr/lib/x86_64-linux-gnu/libQt5Xml.so.5
#8  0x00005589a6ad2fbf in QDomNodeList::at (index=-1, this=0x7ffd24bd83b0) at /usr/include/x86_64-linux-gnu/qt5/QtXml/qdom.h:260
#9  DocumentValidator::checkOrphanedProducers (this=this@entry=0x7ffd24bd87d0) at ./src/doc/documentvalidator.cpp:2239
#10 0x00005589a6ae4a0a in DocumentValidator::validate (this=this@entry=0x7ffd24bd87d0, currentVersion=currentVersion@entry=0.97999999999999998) at ./src/doc/documentvalidator.cpp:232
#11 0x00005589a68703ab in KdenliveDoc::KdenliveDoc (this=0x5589b05009e0, url=..., projectFolder=..., undoGroup=<optimized out>, profileName=..., properties=..., metadata=..., tracks=..., openBackup=0x7ffd24bd896f, parent=0x5589a8676120) at ./src/doc/kdenlivedoc.cpp:220
#12 0x00005589a697cdd4 in ProjectManager::doOpenFile (this=this@entry=0x5589a8630dc0, url=..., stale=stale@entry=0x0) at /usr/include/c++/8/bits/unique_ptr.h:342
#13 0x00005589a697fda6 in ProjectManager::openFile (this=0x5589a8630dc0, url=...) at ./src/project/projectmanager.cpp:504
#14 0x00005589a698017b in ProjectManager::openFile (this=this@entry=0x5589a8630dc0) at ./src/project/projectmanager.cpp:390
#15 0x00005589a698026a in ProjectManager::slotLoadOnOpen (this=0x5589a8630dc0) at ./src/project/projectmanager.cpp:91
#16 0x00005589a66f6af5 in ProjectManager::qt_static_metacall (_o=0x5589a8630dc0, _id=<optimized out>, _a=0x5589aabcb170, _c=<optimized out>) at ./obj-x86_64-linux-gnu/src/kdenliveLib_autogen/QV7S676PVK/moc_projectmanager.cpp:203
#17 0x00007fe5d1256f92 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fe5d26b54a1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007fe5d26bcae0 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007fe5d122d499 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007fe5d123048b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fe5d127fb23 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fe5cb96ec3e in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fe5cb96eed8 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fe5cb96ef6c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fe5d127f143 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fe5c56f2e51 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#28 0x00007fe5d122c16b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fe5d12342e2 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00005589a66815a8 in main (argc=<optimized out>, argv=<optimized out>) at ./src/main.cpp:203
[Inferior 1 (process 9137) detached]
Comment 1 emohr 2019-05-24 17:46:00 UTC 
Thank you for reporting. Confirmed. 

Opened issue: https://invent.kde.org/kde/kdenlive/issues/196