Application: kdenlive (16.04.3)

Qt Version: 5.6.1
Frameworks Version: 5.36.0
Operating System: Linux 4.10.0-37-generic x86_64
Distribution: Linux Mint 18.2 Sonya

-- Information about the crash:
- What I was doing when the application crashed: Adding special effect, such as basic special effect "Dance" and some of other special effects

- Unusual behavior I noticed: Became a little bit slow

- Custom settings of the application: NO custom settings

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".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7f53736958c0 (LWP 6567))]

Thread 26 (Thread 0x7f52313f3700 (LWP 6653)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f53364d495d in ?? () from /usr/lib/x86_64-linux-gnu/mlt/libmltsdl.so
#2  0x00007f536b35f6ba in start_thread (arg=0x7f52313f3700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (Thread 0x7f5231bf4700 (LWP 6652)):
#0  0x00007f536ccd770d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5366dcc38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5366dcc49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f536d90837b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f536d8b0ffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f536d6d99e4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f536b35f6ba in start_thread (arg=0x7f5231bf4700) at pthread_create.c:333
#8  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7f52695f8700 (LWP 6651)):
[KCrash Handler]
#6  0x00007f536cc11428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#7  0x00007f536cc1302a in __GI_abort () at abort.c:89
#8  0x00007f536034e6d8 in pa_fdsem_after_poll () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#9  0x00007f536036503d in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#10 0x00007f53655aa0b7 in pa_mainloop_dispatch () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#11 0x00007f53655aa4bc in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#12 0x00007f5341562feb in ?? () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#13 0x00007f5341535920 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#14 0x00007f534153f0b8 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#15 0x00007f534157ef59 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#16 0x00007f536b35f6ba in start_thread (arg=0x7f52695f8700) at pthread_create.c:333
#17 0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7f528d7fa700 (LWP 6650)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f528d7fa700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7f528dffb700 (LWP 6649)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f528dffb700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7f528e7fc700 (LWP 6648)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f528e7fc700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7f528effd700 (LWP 6647)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f528effd700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7f528f7fe700 (LWP 6646)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f528f7fe700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7f528ffff700 (LWP 6645)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f528ffff700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7f5297324700 (LWP 6644)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f5297324700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7f5297b25700 (LWP 6643)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f5297b25700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f5289ffa700 (LWP 6642)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f5289ffa700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f528b7fd700 (LWP 6641)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f534898c8ae in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec-ffmpeg.so.56
#2  0x00007f536b35f6ba in start_thread (arg=0x7f528b7fd700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f528bffe700 (LWP 6640)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5372687933 in ?? () from /usr/lib/x86_64-linux-gnu/libmlt.so.6
#2  0x000055e80c10bf6d in ?? ()
#3  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f536b35f6ba in start_thread (arg=0x7f528bffe700) at pthread_create.c:333
#5  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f5295a70700 (LWP 6639)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f53364d51c8 in ?? () from /usr/lib/x86_64-linux-gnu/mlt/libmltsdl.so
#2  0x00007f536b35f6ba in start_thread (arg=0x7f5295a70700) at pthread_create.c:333
#3  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f526adfd700 (LWP 6590)):
#0  0x00007f536ccd324d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5366e0f6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5366dcbe74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5366dcc330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5366dcc49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f536d90837b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f536d8b0ffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f536d6d99e4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f536b35f6ba in start_thread (arg=0x7f526adfd700) at pthread_create.c:333
#10 0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f526b7fe700 (LWP 6589)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f536d6df6bb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f5371d2ba8d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007f5371d2c365 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f536b35f6ba in start_thread (arg=0x7f526b7fe700) at pthread_create.c:333
#6  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f526bfff700 (LWP 6588)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5365168eb9 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f536516a617 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f536516a721 in xcb_wait_for_reply () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f536b7b6a47 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#5  0x00007f534bd49933 in ?? () from /usr/lib/nvidia-375/libGLX_nvidia.so.0
#6  0x00007f534bd4a345 in ?? () from /usr/lib/nvidia-375/libGLX_nvidia.so.0
#7  0x00007f53625348aa in ?? () from /usr/lib/nvidia-375/libGLX.so.0
#8  0x00007f5362535e13 in ?? () from /usr/lib/nvidia-375/libGLX.so.0
#9  0x00007f5373881ef1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#10 0x00007f536dc3e35c in QOpenGLContext::makeCurrent(QSurface*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x000055e80c10cc1d in ?? ()
#12 0x000055e80c25802c in ?? ()
#13 0x00007f536d8e0719 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f536e35cafc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f536e362036 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f536d8b32a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f536d8b516a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f536d907f53 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f5366dcc197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f5366dcc3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f5366dcc49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f536d90835f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f536d8b0ffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f536d6d99e4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f536b35f6ba in start_thread (arg=0x7f526bfff700) at pthread_create.c:333
#27 0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f5288883700 (LWP 6587)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f536d6df6bb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f5371d2ba8d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007f5371d2c365 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f536b35f6ba in start_thread (arg=0x7f5288883700) at pthread_create.c:333
#6  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f532261d700 (LWP 6573)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f537211d574 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f537211d5b9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f536b35f6ba in start_thread (arg=0x7f532261d700) at pthread_create.c:333
#4  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f5330e91700 (LWP 6572)):
#0  0x00007f536ccd770d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5366dcc38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5366dcc49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f536d90837b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f536d8b0ffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f536d6d99e4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f536eb4c6b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f536b35f6ba in start_thread (arg=0x7f5330e91700) at pthread_create.c:333
#9  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f5331819700 (LWP 6571)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f536d6df5f6 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f536d6dae2a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f536b35f6ba in start_thread (arg=0x7f5331819700) at pthread_create.c:333
#5  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f5333916700 (LWP 6570)):
#0  0x00007f536ccd770d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5366dcc38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5366dcc49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f536d90837b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f536d8b0ffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f536d6d99e4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f536eb4c6b5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f536b35f6ba in start_thread (arg=0x7f5333916700) at pthread_create.c:333
#9  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f5358abd700 (LWP 6569)):
#0  0x00007f5366e10a94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5366dcbdb9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5366dcc330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5366dcc49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f536d90837b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f536d8b0ffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f536d6d99e4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5373701515 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f536b35f6ba in start_thread (arg=0x7f5358abd700) at pthread_create.c:333
#10 0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f535a401700 (LWP 6568)):
#0  0x00007f536ccd770d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5365168c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f536516a8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f535cf89d29 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f536d6de808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f536b35f6ba in start_thread (arg=0x7f535a401700) at pthread_create.c:333
#6  0x00007f536cce33dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f53736958c0 (LWP 6567)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5365168eb9 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f536516a617 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f536516a721 in xcb_wait_for_reply () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f535cf88a2a in QXcbConnection::sync() () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007f535cfa836e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#6  0x00007f535cfa8404 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#7  0x00007f536dd9448d in QBackingStore::beginPaint(QRegion const&) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#8  0x00007f536e36a764 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007f536e36ab4f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f536e38a3af in QWidgetPrivate::syncBackingStore() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f536e3a1f28 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f536e4ba4bb in QMainWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f5370dff177 in KMainWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#14 0x00007f5370e446b5 in KXmlGuiWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#15 0x00007f536e35cafc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f536e362036 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f536d8b32a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f536d8b516a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f536d907f53 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f5366dcc197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f5366dcc3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f5366dcc49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f536d90835f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f536d8b0ffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f536d8b96bc in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x000055e80beaf3da in ?? ()
#27 0x00007f536cbfc830 in __libc_start_main (main=0x55e80beae700, argc=1, argv=0x7ffd28e1b7c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd28e1b7b8) at ../csu/libc-start.c:291
#28 0x000055e80beafa59 in _start ()

Reported using DrKonqi