Application: kmail (5.9.3)

Qt Version: 5.11.1
Frameworks Version: 5.52.0
Operating System: Linux 4.19.5-300.fc29.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
- What I was doing when the application crashed: I was reading emails and kmail crashed more than once but in the end I can read everything.

- Unusual behavior I noticed: also akregator crashes but I can read the articles more difficult because it crashes continuously.

Very sorry for my bad english

The crash can be reproduced every time.

-- Backtrace:
Application: KMail (kmail), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4ef867c980 (LWP 7654))]

Thread 33 (Thread 0x7f4ebf0b8700 (LWP 7757)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828aa2 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d861 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82eb5f in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 32 (Thread 0x7f4ea77fe700 (LWP 7754)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828aa2 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d861 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82ed41 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 31 (Thread 0x7f4dc33ee700 (LWP 7748)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828aa2 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d861 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82ed41 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 30 (Thread 0x7f4dc3bef700 (LWP 7747)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828aa2 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d861 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82ed41 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 29 (Thread 0x7f4e64b5d700 (LWP 7746)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4ef9235f5a in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f4ef9235fc5 in  () at /lib64/libQt5Script.so.5
#3  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#4  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 28 (Thread 0x7f4e65648700 (LWP 7733)):
#0  0x00007f4efa714eb4 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f4efa6ccaf6 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007f4efa6cd4db in  () at /lib64/libglib-2.0.so.0
#3  0x00007f4efa6cd6d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f4f0638d82b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f4f0633c17b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f4f061a4046 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f4f061ad4bb in  () at /lib64/libQt5Core.so.5
#8  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#9  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 27 (Thread 0x7f4e677fe700 (LWP 7714)):
#0  0x00007f4f05cde421 in poll () at /lib64/libc.so.6
#1  0x00007f4ef8d29675 in poll_func () at /lib64/libpulse.so.0
#2  0x00007f4ef8d1ac58 in pa_mainloop_poll () at /lib64/libpulse.so.0
#3  0x00007f4ef8d1b2a2 in pa_mainloop_iterate () at /lib64/libpulse.so.0
#4  0x00007f4ef8d1b350 in pa_mainloop_run () at /lib64/libpulse.so.0
#5  0x00007f4ef8d295bd in thread () at /lib64/libpulse.so.0
#6  0x00007f4ef898106c in internal_thread_func () at /usr/lib64/pulseaudio/libpulsecommon-12.2.so
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 26 (Thread 0x7f4e67fff700 (LWP 7713)):
#0  0x00007f4f05cf6dbc in __lll_lock_wait_private () at /lib64/libc.so.6
#1  0x00007f4f05cf8c68 in __fprintf_chk () at /lib64/libc.so.6
#2  0x00007f4ef9a8de7f in event_logv_ () at /lib64/libevent-2.1.so.6
#3  0x00007f4ef9a8e048 in event_warn () at /lib64/libevent-2.1.so.6
#4  0x00007f4ef9a8fa40 in epoll_dispatch () at /lib64/libevent-2.1.so.6
#5  0x00007f4ef9a85598 in event_base_loop () at /lib64/libevent-2.1.so.6
#6  0x00007f4eff7fb74d in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4eff81a95b in  () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f4eff83d724 in  () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#11 0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 25 (Thread 0x7f4e98ff9700 (LWP 7712)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff7f51f0 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff81a95b in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff83d724 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 24 (Thread 0x7f4e997fa700 (LWP 7711)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff7f51f0 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff81a95b in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff83d724 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 23 (Thread 0x7f4e99ffb700 (LWP 7710)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826c19 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4f00222cf8 in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff840296 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#6  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 22 (Thread 0x7f4e9a7fc700 (LWP 7709)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826c19 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289c8 in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828a5f in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d878 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82ed41 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 21 (Thread 0x7f4e9affd700 (LWP 7708)):
#0  0x00007f4f05cf6dbc in __lll_lock_wait_private () at /lib64/libc.so.6
#1  0x00007f4f05cf8c68 in __fprintf_chk () at /lib64/libc.so.6
#2  0x00007f4ef9a8de7f in event_logv_ () at /lib64/libevent-2.1.so.6
#3  0x00007f4ef9a8e048 in event_warn () at /lib64/libevent-2.1.so.6
#4  0x00007f4ef9a8fa40 in epoll_dispatch () at /lib64/libevent-2.1.so.6
#5  0x00007f4ef9a85598 in event_base_loop () at /lib64/libevent-2.1.so.6
#6  0x00007f4eff7fb834 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4eff81a95b in  () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f4efe9309ea in  () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f4efe930e97 in  () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f4eff83d858 in  () at /lib64/libQt5WebEngineCore.so.5
#11 0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#13 0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 20 (Thread 0x7f4e9b7fe700 (LWP 7707)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826c19 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289c8 in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828a5f in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d878 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82eb5f in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 19 (Thread 0x7f4e9bfff700 (LWP 7706)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826c19 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289c8 in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828a5f in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d878 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82ed41 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 18 (Thread 0x7f4ea4ff9700 (LWP 7705)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826c19 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289c8 in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828a5f in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d878 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82eb5f in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 17 (Thread 0x7f4ea57fa700 (LWP 7704)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826c19 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289c8 in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828a5f in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d878 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82eb5f in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 16 (Thread 0x7f4ea5ffb700 (LWP 7703)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826c19 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289c8 in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828a5f in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d878 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82eb5f in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7f4ea6ffd700 (LWP 7701)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828aa2 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d861 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82ed41 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7f4ea7fff700 (LWP 7699)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828aa2 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d861 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82ed41 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7f4ebc8b3700 (LWP 7698)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828aa2 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d861 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82ed41 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7f4ebd0b4700 (LWP 7697)):
#0  0x00007f4f04caeb68 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826ce7 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289ba in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828aa2 in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff82d861 in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff82ed41 in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f4ebd8b5700 (LWP 7696)):
#0  0x00007f4f05cf6dbc in __lll_lock_wait_private () at /lib64/libc.so.6
#1  0x00007f4f05cf8c68 in __fprintf_chk () at /lib64/libc.so.6
#2  0x00007f4ef9a8de7f in event_logv_ () at /lib64/libevent-2.1.so.6
#3  0x00007f4ef9a8e048 in event_warn () at /lib64/libevent-2.1.so.6
#4  0x00007f4ef9a8fa40 in epoll_dispatch () at /lib64/libevent-2.1.so.6
#5  0x00007f4ef9a85598 in event_base_loop () at /lib64/libevent-2.1.so.6
#6  0x00007f4eff7fb74d in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4eff81a95b in  () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f4eff83d724 in  () at /lib64/libQt5WebEngineCore.so.5
#9  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#10 0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#11 0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f4ebe0b6700 (LWP 7695)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4eff826c19 in  () at /lib64/libQt5WebEngineCore.so.5
#2  0x00007f4eff8289c8 in  () at /lib64/libQt5WebEngineCore.so.5
#3  0x00007f4eff828a5f in  () at /lib64/libQt5WebEngineCore.so.5
#4  0x00007f4eff7f51df in  () at /lib64/libQt5WebEngineCore.so.5
#5  0x00007f4eff81a95b in  () at /lib64/libQt5WebEngineCore.so.5
#6  0x00007f4eff83d724 in  () at /lib64/libQt5WebEngineCore.so.5
#7  0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#8  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#9  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f4ebe8b7700 (LWP 7694)):
#0  0x00007f4f05cda02f in write () at /lib64/libc.so.6
#1  0x00007f4f05c6995d in _IO_file_write@@GLIBC_2.2.5 () at /lib64/libc.so.6
#2  0x00007f4f05c68ccf in new_do_write () at /lib64/libc.so.6
#3  0x00007f4f05c6a08e in __GI__IO_file_xsputn () at /lib64/libc.so.6
#4  0x00007f4f05c402da in buffered_vfprintf () at /lib64/libc.so.6
#5  0x00007f4f05c3d6f2 in vfprintf () at /lib64/libc.so.6
#6  0x00007f4f05cf8cba in __fprintf_chk () at /lib64/libc.so.6
#7  0x00007f4ef9a8de7f in event_logv_ () at /lib64/libevent-2.1.so.6
#8  0x00007f4ef9a8e048 in event_warn () at /lib64/libevent-2.1.so.6
#9  0x00007f4ef9a8fa40 in epoll_dispatch () at /lib64/libevent-2.1.so.6
#10 0x00007f4ef9a85598 in event_base_loop () at /lib64/libevent-2.1.so.6
#11 0x00007f4eff7fb6f9 in  () at /lib64/libQt5WebEngineCore.so.5
#12 0x00007f4eff81a95b in  () at /lib64/libQt5WebEngineCore.so.5
#13 0x00007f4eff83d724 in  () at /lib64/libQt5WebEngineCore.so.5
#14 0x00007f4eff839171 in  () at /lib64/libQt5WebEngineCore.so.5
#15 0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#16 0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f4ed9cec700 (LWP 7664)):
#0  0x00007f4f05cd9f84 in read () at /lib64/libc.so.6
#1  0x00007f4efa713aa0 in  () at /lib64/libglib-2.0.so.0
#2  0x00007f4efa6cd09b in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f4efa6cd550 in  () at /lib64/libglib-2.0.so.0
#4  0x00007f4efa6cd6d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f4f0638d82b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f4f0633c17b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f4f061a4046 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f4f061ad4bb in  () at /lib64/libQt5Core.so.5
#9  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#10 0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f4eda5ed700 (LWP 7661)):
#0  0x00007f4efa714ee8 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007f4efa6ccd83 in g_main_context_query () at /lib64/libglib-2.0.so.0
#2  0x00007f4efa6cd527 in  () at /lib64/libglib-2.0.so.0
#3  0x00007f4efa6cd6d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f4f0638d82b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f4f0633c17b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f4f061a4046 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f4f061ad4bb in  () at /lib64/libQt5Core.so.5
#8  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#9  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f4edadee700 (LWP 7660)):
#0  0x00007f4efa6ca48e in  () at /lib64/libglib-2.0.so.0
#1  0x00007f4efa6cced2 in g_main_context_check () at /lib64/libglib-2.0.so.0
#2  0x00007f4efa6cd550 in  () at /lib64/libglib-2.0.so.0
#3  0x00007f4efa6cd6d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f4f0638d82b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f4f0633c17b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f4f061a4046 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f4f061ad4bb in  () at /lib64/libQt5Core.so.5
#8  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#9  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f4edb5ef700 (LWP 7659)):
#0  0x00007f4efa6cc9e1 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#1  0x00007f4efa6cd4db in  () at /lib64/libglib-2.0.so.0
#2  0x00007f4efa6cd6d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f4f0638d82b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f4f0633c17b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f4f061a4046 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f4f061ad4bb in  () at /lib64/libQt5Core.so.5
#7  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#8  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f4ee0a8b700 (LWP 7658)):
#0  0x00007f4efa714ebd in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f4efa6cd13a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#2  0x00007f4efa6cd638 in  () at /lib64/libglib-2.0.so.0
#3  0x00007f4efa6cd6d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f4f0638d82b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f4f0633c17b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f4f061a4046 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f4f072b2f89 in  () at /lib64/libQt5DBus.so.5
#8  0x00007f4f061ad4bb in  () at /lib64/libQt5Core.so.5
#9  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#10 0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f4ee90df700 (LWP 7657)):
#0  0x00007f4f04cae77c in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f4ee9e43033 in  () at /usr/lib64/dri/nouveau_dri.so
#2  0x00007f4ee9e42d8b in  () at /usr/lib64/dri/nouveau_dri.so
#3  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#4  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f4eeb472700 (LWP 7656)):
#0  0x00007f4f05cde421 in poll () at /lib64/libc.so.6
#1  0x00007f4efa64b39f in  () at /lib64/libxcb.so.1
#2  0x00007f4efa64d01a in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f4eeb567da9 in  () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f4f061ad4bb in  () at /lib64/libQt5Core.so.5
#5  0x00007f4f04ca858e in start_thread () at /lib64/libpthread.so.0
#6  0x00007f4f05ce96a3 in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f4ef867c980 (LWP 7654)):
[KCrash Handler]
#6  0x00007f4f05c2453f in raise () at /lib64/libc.so.6
#7  0x00007f4f05c0e895 in abort () at /lib64/libc.so.6
#8  0x00007f4f05c0e769 in _nl_load_domain.cold.0 () at /lib64/libc.so.6
#9  0x00007f4f05c1c9f6 in .annobin_assert.c_end () at /lib64/libc.so.6
#10 0x00007f4ee9ad2907 in  () at /lib64/libdrm_nouveau.so.2
#11 0x00007f4ee9ad2867 in nouveau_pushbuf_data () at /lib64/libdrm_nouveau.so.2
#12 0x00007f4ee9ad299f in  () at /lib64/libdrm_nouveau.so.2
#13 0x00007f4ee9ad2def in  () at /lib64/libdrm_nouveau.so.2
#14 0x00007f4ee9ad3a04 in nouveau_pushbuf_kick () at /lib64/libdrm_nouveau.so.2
#15 0x00007f4eea161caa in  () at /usr/lib64/dri/nouveau_dri.so
#16 0x00007f4ee9d7b8df in  () at /usr/lib64/dri/nouveau_dri.so
#17 0x00007f4ee9f3d80f in  () at /usr/lib64/dri/nouveau_dri.so
#18 0x00007f4eea910ed7 in  () at /lib64/libGLX_mesa.so.0
#19 0x00007f4eeb6bed4a in  () at /usr/lib64/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
#20 0x00007f4f0671560f in QOpenGLContext::swapBuffers(QSurface*) () at /lib64/libQt5Gui.so.5
#21 0x00007f4f0693b1dc in QPlatformBackingStore::composeAndFlush(QWindow*, QRegion const&, QPoint const&, QPlatformTextureList*, bool) () at /lib64/libQt5Gui.so.5
#22 0x00007f4eeb589908 in  () at /lib64/libQt5XcbQpa.so.5
#23 0x00007f4f06c37acb in  () at /lib64/libQt5Widgets.so.5
#24 0x00007f4f06c3959b in  () at /lib64/libQt5Widgets.so.5
#25 0x00007f4f06c3a8b2 in  () at /lib64/libQt5Widgets.so.5
#26 0x00007f4f06c3aa51 in  () at /lib64/libQt5Widgets.so.5
#27 0x00007f4f06c52205 in QWidgetPrivate::syncBackingStore() () at /lib64/libQt5Widgets.so.5
#28 0x00007f4f06c6a4c8 in QWidget::event(QEvent*) () at /lib64/libQt5Widgets.so.5
#29 0x00007f4f06d73ab8 in QMainWindow::event(QEvent*) () at /lib64/libQt5Widgets.so.5
#30 0x00007f4f07c91dfb in KMainWindow::event(QEvent*) () at /lib64/libKF5XmlGui.so.5
#31 0x00007f4f07cdb4b9 in KXmlGuiWindow::event(QEvent*) () at /lib64/libKF5XmlGui.so.5
#32 0x00007f4f06c2b2a5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#33 0x00007f4f06c329c0 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#34 0x00007f4f0633d236 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#35 0x00007f4f0634040b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#36 0x00007f4f0638da87 in  () at /lib64/libQt5Core.so.5
#37 0x00007f4efa6cd26d in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#38 0x00007f4efa6cd638 in  () at /lib64/libglib-2.0.so.0
#39 0x00007f4efa6cd6d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#40 0x00007f4f0638d813 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#41 0x00007f4eeb5faf15 in  () at /lib64/libQt5XcbQpa.so.5
#42 0x00007f4f0633c17b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#43 0x00007f4f06344246 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#44 0x0000557d1704673f in  ()
#45 0x00007f4f05c10413 in __libc_start_main () at /lib64/libc.so.6
#46 0x0000557d170468ee in _start ()
[Inferior 1 (process 7654) detached]

Reported using DrKonqi