[kmail2] [Bug 403007] KMail crashes by selecting freshly arrived unread mails

Werner Bernhard bugzilla_noreply at kde.org
Thu Jan 24 14:47:52 GMT 2019 

https://bugs.kde.org/show_bug.cgi?id=403007

--- Comment #8 from Werner Bernhard <wrbernhard at gmail.com> ---
Right now, afte a crash, opening a new mail, I received a new error message.

Application: Kontact (kontact), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7e2be53b00 (LWP 9170))]

Thread 31 (Thread 0x7f7d0d1ee700 (LWP 9265)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e389924d7 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 30 (Thread 0x7f7d0d9ef700 (LWP 9264)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 29 (Thread 0x7f7d0e1f0700 (LWP 9263)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e389924d7 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 28 (Thread 0x7f7d34930700 (LWP 9250)):
#0  0x00007f7e40198c21 in poll () from /usr/lib/libc.so.6
#1  0x00007f7e3e3e4540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f7e3e3e462e in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#3  0x00007f7e406e75c4 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt5Core.so.5
#4  0x00007f7e4069058c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt5Core.so.5
#5  0x00007f7e404d45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f7e404d59cc in ?? () from /usr/lib/libQt5Core.so.5
#7  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 27 (Thread 0x7f7d36097700 (LWP 9218)):
#0  0x00007f7e40198c21 in poll () from /usr/lib/libc.so.6
#1  0x00007f7e3e3e4540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f7e3e3e462e in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#3  0x00007f7e406e75c4 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt5Core.so.5
#4  0x00007f7e4069058c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt5Core.so.5
#5  0x00007f7e404d45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f7e404d59cc in ?? () from /usr/lib/libQt5Core.so.5
#7  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 26 (Thread 0x7f7d36a6e700 (LWP 9210)):
#0  0x00007f7e40198c21 in poll () from /usr/lib/libc.so.6
#1  0x00007f7e3e3e4540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f7e3e3e462e in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#3  0x00007f7e406e75c4 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt5Core.so.5
#4  0x00007f7e4069058c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt5Core.so.5
#5  0x00007f7e404d45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f7e404d59cc in ?? () from /usr/lib/libQt5Core.so.5
#7  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 25 (Thread 0x7f7d3726f700 (LWP 9209)):
#0  0x00007f7e401947a4 in read () from /usr/lib/libc.so.6
#1  0x00007f7e3e392971 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f7e3e3e30b0 in g_main_context_check () from
/usr/lib/libglib-2.0.so.0
#3  0x00007f7e3e3e44e6 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0x00007f7e3e3e462e in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#5  0x00007f7e406e75c4 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt5Core.so.5
#6  0x00007f7e4069058c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt5Core.so.5
#7  0x00007f7e404d45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#8  0x00007f7e404d59cc in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 24 (Thread 0x7f7d37b01700 (LWP 9208)):
#0  0x00007f7e401947a4 in read () from /usr/lib/libc.so.6
#1  0x00007f7e3e392971 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f7e3e3e30b0 in g_main_context_check () from
/usr/lib/libglib-2.0.so.0
#3  0x00007f7e3e3e44e6 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0x00007f7e3e3e462e in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#5  0x00007f7e406e75c4 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt5Core.so.5
#6  0x00007f7e4069058c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt5Core.so.5
#7  0x00007f7e404d45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#8  0x00007f7e404d59cc in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 23 (Thread 0x7f7d3dffb700 (LWP 9196)):
#0  0x00007f7e3eff8afc in pthread_cond_wait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0379 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d1178 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d120f in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990318 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992b44 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 22 (Thread 0x7f7d3e7fc700 (LWP 9195)):
#0  0x00007f7e401b112b in __lll_lock_wait_private () from /usr/lib/libc.so.6
#1  0x00007f7e401b2f38 in __fprintf_chk () from /usr/lib/libc.so.6
#2  0x00007f7e32eb82f0 in event_logv_ () from /usr/lib/libevent-2.1.so.6
#3  0x00007f7e32eb84b7 in event_warn () from /usr/lib/libevent-2.1.so.6
#4  0x00007f7e32eb9ee2 in ?? () from /usr/lib/libevent-2.1.so.6
#5  0x00007f7e32eafac8 in event_base_loop () from /usr/lib/libevent-2.1.so.6
#6  0x00007f7e389d3f64 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e3896f63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e389a2608 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#9  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#10 0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 21 (Thread 0x7f7d3effd700 (LWP 9194)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 20 (Thread 0x7f7d3f7fe700 (LWP 9193)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 19 (Thread 0x7f7d3ffff700 (LWP 9192)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 18 (Thread 0x7f7df0ff9700 (LWP 9191)):
#0  0x00007f7e3eff8afc in pthread_cond_wait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e3330228c in ?? () from /usr/lib/libQt5Script.so.5
#2  0x00007f7e333022a9 in ?? () from /usr/lib/libQt5Script.so.5
#3  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#4  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 17 (Thread 0x7f7df17fa700 (LWP 9190)):
#0  0x00007f7e1c07faf3 in ?? () from /usr/lib/pulseaudio/libpulsecommon-12.2.so
#1  0x00007f7e1c08290b in ?? () from /usr/lib/pulseaudio/libpulsecommon-12.2.so
#2  0x00007f7e1c082cba in ?? () from /usr/lib/pulseaudio/libpulsecommon-12.2.so
#3  0x00007f7e1c08354a in ?? () from /usr/lib/pulseaudio/libpulsecommon-12.2.so
#4  0x00007f7e1c2e5d18 in pa_mainloop_dispatch () from /usr/lib/libpulse.so.0
#5  0x00007f7e1c2e5fef in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#6  0x00007f7e1c2e6091 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#7  0x00007f7e1c2f45ae in ?? () from /usr/lib/libpulse.so.0
#8  0x00007f7e1c0939fc in ?? () from /usr/lib/pulseaudio/libpulsecommon-12.2.so
#9  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 16 (Thread 0x7f7df1ffb700 (LWP 9189)):
#0  0x00007f7e401b112b in __lll_lock_wait_private () from /usr/lib/libc.so.6
#1  0x00007f7e401b2f38 in __fprintf_chk () from /usr/lib/libc.so.6
#2  0x00007f7e32eb82f0 in event_logv_ () from /usr/lib/libevent-2.1.so.6
#3  0x00007f7e32eb84b7 in event_warn () from /usr/lib/libevent-2.1.so.6
#4  0x00007f7e32eb9ee2 in ?? () from /usr/lib/libevent-2.1.so.6
#5  0x00007f7e32eafac8 in event_base_loop () from /usr/lib/libevent-2.1.so.6
#6  0x00007f7e389d3e7d in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e3896f63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e389a2608 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#9  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#10 0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 15 (Thread 0x7f7df27fc700 (LWP 9188)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e3894b950 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e3896f63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e389a2608 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 14 (Thread 0x7f7df2ffd700 (LWP 9187)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e3894b950 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e3896f63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e389a2608 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 13 (Thread 0x7f7df37fe700 (LWP 9186)):
#0  0x00007f7e3eff8afc in pthread_cond_wait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0379 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e392a8ee8 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389a28cf in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 12 (Thread 0x7f7df3fff700 (LWP 9185)):
#0  0x00007f7e3eff8afc in pthread_cond_wait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0379 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d1178 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d120f in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990318 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992b04 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 11 (Thread 0x7f7e0cff9700 (LWP 9184)):
#0  0x00007f7e4019484f in write () from /usr/lib/libc.so.6
#1  0x00007f7e4012485d in _IO_file_write@@GLIBC_2.2.5 () from
/usr/lib/libc.so.6
#2  0x00007f7e40123bbf in new_do_write () from /usr/lib/libc.so.6
#3  0x00007f7e40124f96 in __GI__IO_file_xsputn () from /usr/lib/libc.so.6
#4  0x00007f7e400fb732 in buffered_vfprintf () from /usr/lib/libc.so.6
#5  0x00007f7e400f8c12 in vfprintf () from /usr/lib/libc.so.6
#6  0x00007f7e401b2f8a in __fprintf_chk () from /usr/lib/libc.so.6
#7  0x00007f7e32eb82f0 in event_logv_ () from /usr/lib/libevent-2.1.so.6
#8  0x00007f7e32eb84b7 in event_warn () from /usr/lib/libevent-2.1.so.6
#9  0x00007f7e32eb9ee2 in ?? () from /usr/lib/libevent-2.1.so.6
#10 0x00007f7e32eafac8 in event_base_loop () from /usr/lib/libevent-2.1.so.6
#11 0x00007f7e389d3e29 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#12 0x00007f7e3896f63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#13 0x00007f7e38321ce4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#14 0x00007f7e389a26d8 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#15 0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#16 0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#17 0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 10 (Thread 0x7f7e0d7fa700 (LWP 9183)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 9 (Thread 0x7f7e0dffb700 (LWP 9182)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 8 (Thread 0x7f7e0e7fc700 (LWP 9181)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 7 (Thread 0x7f7e0effd700 (LWP 9180)):
#0  0x00007f7e3eff8ef6 in pthread_cond_timedwait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e389d0447 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#2  0x00007f7e389d116a in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#3  0x00007f7e389d1252 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#4  0x00007f7e38990301 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#5  0x00007f7e38992806 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#6  0x00007f7e38992ac4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 6 (Thread 0x7f7e0f7fe700 (LWP 9179)):
#0  0x00007f7e401b1159 in __lll_unlock_wake_private () from /usr/lib/libc.so.6
#1  0x00007f7e401b2fd0 in __fprintf_chk () from /usr/lib/libc.so.6
#2  0x00007f7e32eb82f0 in event_logv_ () from /usr/lib/libevent-2.1.so.6
#3  0x00007f7e32eb84b7 in event_warn () from /usr/lib/libevent-2.1.so.6
#4  0x00007f7e32eb9ee2 in ?? () from /usr/lib/libevent-2.1.so.6
#5  0x00007f7e32eafac8 in event_base_loop () from /usr/lib/libevent-2.1.so.6
#6  0x00007f7e389d3e29 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e3896f63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e38994fd4 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#9  0x00007f7e389a26d8 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#10 0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#11 0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#12 0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 5 (Thread 0x7f7e1ce19700 (LWP 9177)):
#0  0x00007f7e401b112b in __lll_lock_wait_private () from /usr/lib/libc.so.6
#1  0x00007f7e401b2f38 in __fprintf_chk () from /usr/lib/libc.so.6
#2  0x00007f7e32eb82f0 in event_logv_ () from /usr/lib/libevent-2.1.so.6
#3  0x00007f7e32eb84b7 in event_warn () from /usr/lib/libevent-2.1.so.6
#4  0x00007f7e32eb9ee2 in ?? () from /usr/lib/libevent-2.1.so.6
#5  0x00007f7e32eafac8 in event_base_loop () from /usr/lib/libevent-2.1.so.6
#6  0x00007f7e389d3e7d in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#7  0x00007f7e3896f63b in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#8  0x00007f7e389a2608 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#9  0x00007f7e389d3361 in ?? () from /usr/lib/libQt5WebEngineCore.so.5
#10 0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7f7e1f2f3700 (LWP 9174)):
#0  0x00007f7e40198c21 in poll () from /usr/lib/libc.so.6
#1  0x00007f7e3e3e4540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f7e3e3e462e in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#3  0x00007f7e406e75c4 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt5Core.so.5
#4  0x00007f7e4069058c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt5Core.so.5
#5  0x00007f7e404d45c9 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f7e3fbafba6 in ?? () from /usr/lib/libQt5DBus.so.5
#7  0x00007f7e404d59cc in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7f7e2002e700 (LWP 9173)):
#0  0x00007f7e3eff8afc in pthread_cond_wait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f7e28a45704 in ?? () from /usr/lib/dri/nouveau_dri.so
#2  0x00007f7e28a45428 in ?? () from /usr/lib/dri/nouveau_dri.so
#3  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#4  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f7e2a9d8700 (LWP 9172)):
#0  0x00007f7e40198c21 in poll () from /usr/lib/libc.so.6
#1  0x00007f7e3f21d630 in ?? () from /usr/lib/libxcb.so.1
#2  0x00007f7e3f21f2db in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#3  0x00007f7e2b92e96b in ?? () from /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f7e404d59cc in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f7e3eff2a9d in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f7e401a3b23 in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f7e2be53b00 (LWP 9170)):
[KCrash Handler]
#6  0x00007f7e400dfd7f in raise () from /usr/lib/libc.so.6
#7  0x00007f7e400ca672 in abort () from /usr/lib/libc.so.6
#8  0x00007f7e40122878 in __libc_message () from /usr/lib/libc.so.6
#9  0x00007f7e4012918a in malloc_printerr () from /usr/lib/libc.so.6
#10 0x00007f7e4012ab27 in _int_free () from /usr/lib/libc.so.6
#11 0x00007f7e285edc29 in ?? () from /usr/lib/dri/nouveau_dri.so
#12 0x00007f7e285ede17 in ?? () from /usr/lib/dri/nouveau_dri.so
#13 0x00007f7e285ee0f2 in ?? () from /usr/lib/dri/nouveau_dri.so
#14 0x00007f7e2887d601 in ?? () from /usr/lib/dri/nouveau_dri.so
#15 0x00007f7e2887d650 in ?? () from /usr/lib/dri/nouveau_dri.so
#16 0x00007f7e3dccb474 in ?? () from /usr/lib/libQt5QuickWidgets.so.5
#17 0x00007f7e3dccb5d7 in ?? () from /usr/lib/libQt5QuickWidgets.so.5
#18 0x00007f7e406bcb1b in QObject::event(QEvent*) () from
/usr/lib/libQt5Core.so.5
#19 0x00007f7e41098e8c in QWidget::event(QEvent*) () from
/usr/lib/libQt5Widgets.so.5
#20 0x00007f7e3dccf29e in QQuickWidget::event(QEvent*) () from
/usr/lib/libQt5QuickWidgets.so.5
#21 0x00007f7e3fa89291 in ?? () from /usr/lib/libQt5WebEngineWidgets.so.5
#22 0x00007f7e41057e34 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/libQt5Widgets.so.5
#23 0x00007f7e4105f671 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/libQt5Widgets.so.5
#24 0x00007f7e406918f9 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /usr/lib/libQt5Core.so.5
#25 0x00007f7e406e6955 in QTimerInfoList::activateTimers() () from
/usr/lib/libQt5Core.so.5
#26 0x00007f7e406e71e2 in ?? () from /usr/lib/libQt5Core.so.5
#27 0x00007f7e3e3e2a2f in g_main_context_dispatch () from
/usr/lib/libglib-2.0.so.0
#28 0x00007f7e3e3e45e9 in ?? () from /usr/lib/libglib-2.0.so.0
#29 0x00007f7e3e3e462e in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#30 0x00007f7e406e75a9 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt5Core.so.5
#31 0x00007f7e4069058c in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt5Core.so.5
#32 0x00007f7e40698896 in QCoreApplication::exec() () from
/usr/lib/libQt5Core.so.5
#33 0x0000564ec7999189 in ?? ()
#34 0x00007f7e400cc223 in __libc_start_main () from /usr/lib/libc.so.6
#35 0x0000564ec79998be in _start ()
[Inferior 1 (process 9170) detached]

I never have seen this, as the application did not crash opening a new message.

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