Application: akregator (5.7.3)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-34-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Using the middle mouse button to open a link inside a news entry in the external default browser (Firefox with profile)

The crash can be reproduced every time.

-- Backtrace:
Application: Akregator (akregator), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f449d6d00c0 (LWP 25819))]

Thread 33 (Thread 0x7f430e90c700 (LWP 14576)):
#0  0x00007f449386eed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f430e90b8c0, expected=0, futex_word=0x7f4334005764) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f449386eed9 in __pthread_cond_wait_common (abstime=0x7f430e90b980, mutex=0x7f4334005710, cond=0x7f4334005738) at pthread_cond_wait.c:533
#2  0x00007f449386eed9 in __pthread_cond_timedwait (cond=0x7f4334005738, mutex=0x7f4334005710, abstime=0x7f430e90b980) at pthread_cond_wait.c:667
#3  0x00007f4499c4c458 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f4499c4852d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4499c4b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f44938686db in start_thread (arg=0x7f430e90c700) at pthread_create.c:463
#7  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 32 (Thread 0x7f443dffb700 (LWP 10988)):
#0  0x00007f449386eed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f443dffa7e0, expected=0, futex_word=0x7f44240046c0) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f449386eed9 in __pthread_cond_wait_common (abstime=0x7f443dffa880, mutex=0x7f4424004670, cond=0x7f4424004698) at pthread_cond_wait.c:533
#2  0x00007f449386eed9 in __pthread_cond_timedwait (cond=0x7f4424004698, mutex=0x7f4424004670, abstime=0x7f443dffa880) at pthread_cond_wait.c:667
#3  0x00007f4489e77652 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e4d799 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e4dcfb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f44938686db in start_thread (arg=0x7f443dffb700) at pthread_create.c:463
#8  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 31 (Thread 0x7f433a4e4700 (LWP 25874)):
#0  0x00007f4499539bf9 in __GI___poll (fds=0x7f43340027e0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f44919c6539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f44919c664c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4499e8290b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f4499e279ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4499c4622a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4496103e8f in  () at /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#7  0x00007f4499c4b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f44938686db in start_thread (arg=0x7f433a4e4700) at pthread_create.c:463
#9  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 30 (Thread 0x7f4340c70700 (LWP 25873)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eba36eff8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eba36efa8, cond=0x557eba36efd0) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eba36efd0, mutex=0x557eba36efa8) at pthread_cond_wait.c:655
#3  0x00007f4489e48c95 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e49177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e49f11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f44938686db in start_thread (arg=0x7f4340c70700) at pthread_create.c:463
#8  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 29 (Thread 0x7f434189e700 (LWP 25862)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eba7fcb70) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eba7fcb20, cond=0x557eba7fcb48) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eba7fcb48, mutex=0x557eba7fcb20) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f434189e700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7f434209f700 (LWP 25861)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eba6fb780) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eba6fb730, cond=0x557eba6fb758) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eba6fb758, mutex=0x557eba6fb730) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f434209f700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f43c395f700 (LWP 25860)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f448687cfb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f448687cf68, cond=0x7f448687cf90) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x7f448687cf90, mutex=0x7f448687cf68) at pthread_cond_wait.c:655
#3  0x00007f44865865f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f4486586639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f44938686db in start_thread (arg=0x7f43c395f700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f43cdae2700 (LWP 25855)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eba547610) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eba5475c0, cond=0x557eba5475e8) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eba5475e8, mutex=0x557eba5475c0) at pthread_cond_wait.c:655
#3  0x00007f4499c4c59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f4499c44c0b in QSemaphore::acquire(int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f43cead080c in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#6  0x00007f4499c4b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f44938686db in start_thread (arg=0x7f43cdae2700) at pthread_create.c:463
#8  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f43f67fc700 (LWP 25854)):
#0  0x00007f4499539bf9 in __GI___poll (fds=0x7f43c8004a10, nfds=1, timeout=9561) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f44919c6539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f44919c664c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4499e8290b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f4499e279ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4499c4622a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4499c4b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f44938686db in start_thread (arg=0x7f43f67fc700) at pthread_create.c:463
#8  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f43f6ffd700 (LWP 25853)):
#0  0x00007f4499539bf9 in __GI___poll (fds=0x7f43e4007030, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f4481c93451 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f4481c84e10 in pa_mainloop_poll () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f4481c854a0 in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f4481c85530 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f4481c93399 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f44784302a8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f44938686db in start_thread (arg=0x7f43f6ffd700) at pthread_create.c:463
#8  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f43f77fe700 (LWP 25852)):
#0  0x00007f449386eed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f43f77fd5d0, expected=0, futex_word=0x7f43f77fd758) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f449386eed9 in __pthread_cond_wait_common (abstime=0x7f43f77fd670, mutex=0x7f43f77fd708, cond=0x7f43f77fd730) at pthread_cond_wait.c:533
#2  0x00007f449386eed9 in __pthread_cond_timedwait (cond=0x7f43f77fd730, mutex=0x7f43f77fd708, abstime=0x7f43f77fd670) at pthread_cond_wait.c:667
#3  0x00007f4489e77652 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e3e91e in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e1952b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f4489e4a4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f44938686db in start_thread (arg=0x7f43f77fe700) at pthread_create.c:463
#11 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f43f7fff700 (LWP 25851)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eba416ce8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eba416c28, cond=0x557eba416cc0) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eba416cc0, mutex=0x557eba416c28) at pthread_cond_wait.c:655
#3  0x00007f448a5d0060 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e49f11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f44938686db in start_thread (arg=0x7f43f7fff700) at pthread_create.c:463
#7  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f4414ff9700 (LWP 25850)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4414ff8738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4414ff86e8, cond=0x7f4414ff8710) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x7f4414ff8710, mutex=0x7f4414ff86e8) at pthread_cond_wait.c:655
#3  0x00007f4489e3e999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e3e9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e194db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f4489e4a4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f44938686db in start_thread (arg=0x7f4414ff9700) at pthread_create.c:463
#11 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f44157fa700 (LWP 25849)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eba36eff8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eba36efa8, cond=0x557eba36efd0) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eba36efd0, mutex=0x557eba36efa8) at pthread_cond_wait.c:655
#3  0x00007f4489e48c95 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e49177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e49f11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f44938686db in start_thread (arg=0x7f44157fa700) at pthread_create.c:463
#8  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f4415ffb700 (LWP 25848)):
[KCrash Handler]
#6  0x0000557ebbacdfe0 in  ()
#7  0x00007f4489482a66 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f448a298b81 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f448a39fe67 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f44898746a0 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f4489874a75 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f448987d1c2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f4489860649 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f4489e72a83 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f4489e16a00 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f4489e18058 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007f4489e183eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007f4489e19aa2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#19 0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#21 0x00007f44896d0978 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#22 0x00007f44896d0f2b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#23 0x00007f4489e4a588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#24 0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#25 0x00007f44938686db in start_thread (arg=0x7f4415ffb700) at pthread_create.c:463
#26 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f44167fc700 (LWP 25847)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f44167fb358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f44167fb308, cond=0x7f44167fb330) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x7f44167fb330, mutex=0x7f44167fb308) at pthread_cond_wait.c:655
#3  0x00007f4489e3e999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e3e9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e194db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f44896d08c8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f44896d0f1b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f4489e4a588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f44938686db in start_thread (arg=0x7f44167fc700) at pthread_create.c:463
#13 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f4416ffd700 (LWP 25846)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f4416ffc358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f4416ffc308, cond=0x7f4416ffc330) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x7f4416ffc330, mutex=0x7f4416ffc308) at pthread_cond_wait.c:655
#3  0x00007f4489e3e999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e3e9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e194db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f44896d0818 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f44896d0f0b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f4489e4a588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f44938686db in start_thread (arg=0x7f4416ffd700) at pthread_create.c:463
#13 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f44177fe700 (LWP 25845)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f44177fd358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f44177fd308, cond=0x7f44177fd330) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x7f44177fd330, mutex=0x7f44177fd308) at pthread_cond_wait.c:655
#3  0x00007f4489e3e999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e3e9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e194db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f44896d0768 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f44896d0efb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f4489e4a588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f44938686db in start_thread (arg=0x7f44177fe700) at pthread_create.c:463
#13 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f4417fff700 (LWP 25844)):
#0  0x00007f4499535187 in __GI___libc_write (fd=2, buf=0x7f4417ffb6e0, nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f44994b01bd in _IO_new_file_write (f=0x7f4499811680 <_IO_2_1_stderr_>, data=0x7f4417ffb6e0, n=39) at fileops.c:1203
#2  0x00007f44994b0b2f in new_do_write (to_do=<optimized out>, data=0x7f4417ffb6e0 "[warn] epoll_wait: Bad file descriptor\n", fp=0x7f4499811680 <_IO_2_1_stderr_>) at fileops.c:457
#3  0x00007f44994b0b2f in _IO_new_file_xsputn (f=0x7f4499811680 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1277
#4  0x00007f4499483707 in buffered_vfprintf (s=s@entry=0x7f4499811680 <_IO_2_1_stderr_>, format=format@entry=0x7f447f4ae6a8 "[%s] %s\n", args=args@entry=0x7f4417ffdca0) at vfprintf.c:2350
#5  0x00007f4499480726 in _IO_vfprintf_internal (s=s@entry=0x7f4499811680 <_IO_2_1_stderr_>, format=0x7f447f4ae6a8 "[%s] %s\n", ap=ap@entry=0x7f4417ffdca0) at vfprintf.c:1301
#6  0x00007f44995574c6 in ___fprintf_chk (fp=0x7f4499811680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f447f4969ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f447f496b44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f447f49846c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f447f48e114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f4489e19ab9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f44896d06b8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f44896d0eeb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f4489e4a588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007f44938686db in start_thread (arg=0x7f4417fff700) at pthread_create.c:463
#19 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f443cff9700 (LWP 25843)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f443cff8358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f443cff8308, cond=0x7f443cff8330) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x7f443cff8330, mutex=0x7f443cff8308) at pthread_cond_wait.c:655
#3  0x00007f4489e3e999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e3e9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e194db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f44896d0608 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f44896d0edb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f4489e4a588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f44938686db in start_thread (arg=0x7f443cff9700) at pthread_create.c:463
#13 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f443e7fc700 (LWP 25840)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f443e7fb738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f443e7fb6e8, cond=0x7f443e7fb710) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x7f443e7fb710, mutex=0x7f443e7fb6e8) at pthread_cond_wait.c:655
#3  0x00007f4489e3e999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f4489e3e9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f4489e194db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f4489e4a4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f44938686db in start_thread (arg=0x7f443e7fc700) at pthread_create.c:463
#11 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f443effd700 (LWP 25839)):
#0  0x00007f44995556ac in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f4499557474 in ___fprintf_chk (fp=0x7f44998128b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f447f4ae6a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f447f4969ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f447f496b44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f447f49846c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f447f48e114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f4489e19b0d in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f4489e15da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f4489e3277b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f4489e4a4d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f4489e465eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f44938686db in start_thread (arg=0x7f443effd700) at pthread_create.c:463
#12 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f444a5f2700 (LWP 25832)):
#0  0x00007f4491a0c064 in g_mutex_unlock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f44919c5d39 in g_main_context_query () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f44919c64b7 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f44919c664c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4499e8290b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4499e279ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4499c4622a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f449b84ad45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f4499c4b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f44938686db in start_thread (arg=0x7f444a5f2700) at pthread_create.c:463
#10 0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f444affd700 (LWP 25831)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eba215560) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eba215510, cond=0x557eba215538) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eba215538, mutex=0x557eba215510) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f444affd700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f444b7fe700 (LWP 25830)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eb9f32cc8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eb9f32c78, cond=0x557eb9f32ca0) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eb9f32ca0, mutex=0x557eb9f32c78) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f444b7fe700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f444bfff700 (LWP 25829)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eb9f32cc8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eb9f32c78, cond=0x557eb9f32ca0) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eb9f32ca0, mutex=0x557eb9f32c78) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f444bfff700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f4458b13700 (LWP 25828)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eb9f32748) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eb9f326f8, cond=0x557eb9f32720) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eb9f32720, mutex=0x557eb9f326f8) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f4458b13700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f4459314700 (LWP 25827)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eb9f3274c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eb9f326f8, cond=0x557eb9f32720) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eb9f32720, mutex=0x557eb9f326f8) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f4459314700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f4459b15700 (LWP 25826)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eb9f32748) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eb9f326f8, cond=0x557eb9f32720) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eb9f32720, mutex=0x557eb9f326f8) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f4459b15700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f445a316700 (LWP 25825)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eb9e7a06c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eb9e7a018, cond=0x557eb9e7a040) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eb9e7a040, mutex=0x557eb9e7a018) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f445a316700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f445b280700 (LWP 25824)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x557eb9f315b8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eb9f31568, cond=0x557eb9f31590) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x557eb9f31590, mutex=0x557eb9f31568) at pthread_cond_wait.c:655
#3  0x00007f446442f23b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f446442ef67 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f44938686db in start_thread (arg=0x7f445b280700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f4467995700 (LWP 25823)):
#0  0x00007f4499539bf9 in __GI___poll (fds=0x7f4467994928, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f449175d747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f449175f36a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f44696902a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f4499c4b16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f44938686db in start_thread (arg=0x7f4467995700) at pthread_create.c:463
#6  0x00007f449954688f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f449d6d00c0 (LWP 25819)):
#0  0x00007f449386e9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7ffc25d27288) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f449386e9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x557eb9e2ba98, cond=0x7ffc25d27260) at pthread_cond_wait.c:502
#2  0x00007f449386e9f3 in __pthread_cond_wait (cond=0x7ffc25d27260, mutex=0x557eb9e2ba98) at pthread_cond_wait.c:655
#3  0x00007f449175d952 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f449175f06f in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#5  0x00007f449175f180 in xcb_wait_for_reply () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#6  0x00007f44696b2ae5 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#7  0x00007f44696b2c2c in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#8  0x00007f449a3f9495 in QCursor::pos(QScreen const*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#9  0x00007f449ae5d889 in QTreeView::drawTree(QPainter*, QRegion const&) const () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f449ae625c5 in QTreeView::paintEvent(QPaintEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f449abe6038 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f449ac874be in QFrame::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f449adfab3b in QAbstractItemView::viewportEvent(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f449ae634dc in QTreeView::viewportEvent(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f4499e2968c in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f449aba7805 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f449abaf0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f4499e299a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f449abdf18a in QWidgetPrivate::sendPaintEvent(QRegion const&) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f449abdf74a in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f449abe03b0 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007f449abe0539 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f449abdf356 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f449abe03b0 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007f449abdf356 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007f449abe03b0 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f449abdf356 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f449abe03b0 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007f449abdf356 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f449abe03b0 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007f449abe0539 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007f449abdf356 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007f449abb6e54 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007f449abb7095 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007f449abce66f in QWidgetPrivate::syncBackingStore() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007f449abe61a8 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007f449acf9c4b in QMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#38 0x00007f449c285b87 in KMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#39 0x00007f449c2ca9e5 in KXmlGuiWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#40 0x00007f449aba782c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007f449abaf0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x00007f4499e299a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x00007f4499e2c11d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x00007f4499e832c3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x00007f44919c6387 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007f44919c65c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f44919c664c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007f4499e828ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007f4499e279ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#50 0x00007f4499e30a84 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#51 0x0000557eb8d11a60 in  ()
#52 0x00007f4499446b97 in __libc_start_main (main=0x557eb8d11530, argc=1, argv=0x7ffc25d298c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc25d298b8) at ../csu/libc-start.c:310
#53 0x0000557eb8d11bfa in _start ()

Reported using DrKonqi