Application: kmail (5.7.3)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-99-generic x86_64
Distribution: Ubuntu 18.04.4 LTS

-- Information about the crash:
- What I was doing when the application crashed: mettere la posta nel cestino.
scroll in giu improvvisamente si e' chiusa la finestra

The crash can be reproduced every time.

-- Backtrace:
Application: KMail (kmail), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f19de457b80 (LWP 8881))]

Thread 36 (Thread 0x7f18aa2af700 (LWP 9372)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4ef16908) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4ef168b8, cond=0x55ce4ef168e0) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4ef168e0, mutex=0x55ce4ef168b8) at pthread_cond_wait.c:655
#3  0x00007f19c5927c95 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c5928177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c5928f11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19dadd76db in start_thread (arg=0x7f18aa2af700) at pthread_create.c:463
#8  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 35 (Thread 0x7f18ad88f700 (LWP 9300)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4ef1690c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4ef168b8, cond=0x55ce4ef168e0) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4ef168e0, mutex=0x55ce4ef168b8) at pthread_cond_wait.c:655
#3  0x00007f19c5927c95 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c5928177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c5928f11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19dadd76db in start_thread (arg=0x7f18ad88f700) at pthread_create.c:463
#8  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 34 (Thread 0x7f192eac7700 (LWP 9299)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f19c21b8fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f19c21b8f68, cond=0x7f19c21b8f90) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x7f19c21b8f90, mutex=0x7f19c21b8f68) at pthread_cond_wait.c:655
#3  0x00007f19c1ec25f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f19c1ec2639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f19dadd76db in start_thread (arg=0x7f192eac7700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 33 (Thread 0x7f193038f700 (LWP 9286)):
#0  0x00007f19cee914ba in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f19cee93a63 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f19cee944fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f19cee946dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f19dbc638ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f19dbc0890a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f19dba2723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f19dba2c17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f19dadd76db in start_thread (arg=0x7f193038f700) at pthread_create.c:463
#9  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 32 (Thread 0x7f1932e2e700 (LWP 9010)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4f4806fc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4f4806a8, cond=0x55ce4f4806d0) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4f4806d0, mutex=0x55ce4f4806a8) at pthread_cond_wait.c:655
#3  0x00007f199c85fa0b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f199c85f607 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f19dadd76db in start_thread (arg=0x7f1932e2e700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 31 (Thread 0x7f193362f700 (LWP 9008)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4f3685e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4f368598, cond=0x55ce4f3685c0) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4f3685c0, mutex=0x55ce4f368598) at pthread_cond_wait.c:655
#3  0x00007f199c85fa0b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f199c85f607 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f19dadd76db in start_thread (arg=0x7f193362f700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 30 (Thread 0x7f19377f4700 (LWP 8944)):
#0  0x00007f19daddded9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f19377f37e0, expected=0, futex_word=0x7f194c004da0) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f19daddded9 in __pthread_cond_wait_common (abstime=0x7f19377f3880, mutex=0x7f194c004d50, cond=0x7f194c004d78) at pthread_cond_wait.c:533
#2  0x00007f19daddded9 in __pthread_cond_timedwait (cond=0x7f194c004d78, mutex=0x7f194c004d50, abstime=0x7f19377f3880) at pthread_cond_wait.c:667
#3  0x00007f19c5956652 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c592c799 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c592ccfb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19dadd76db in start_thread (arg=0x7f19377f4700) at pthread_create.c:463
#8  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 29 (Thread 0x7f1937ff5700 (LWP 8943)):
#0  0x00007f19daddded9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f1937ff47e0, expected=0, futex_word=0x7f194c004da0) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f19daddded9 in __pthread_cond_wait_common (abstime=0x7f1937ff4880, mutex=0x7f194c004d50, cond=0x7f194c004d78) at pthread_cond_wait.c:533
#2  0x00007f19daddded9 in __pthread_cond_timedwait (cond=0x7f194c004d78, mutex=0x7f194c004d50, abstime=0x7f1937ff4880) at pthread_cond_wait.c:667
#3  0x00007f19c5956652 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c592c799 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c592ccfb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19dadd76db in start_thread (arg=0x7f1937ff5700) at pthread_create.c:463
#8  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7f19387f6700 (LWP 8942)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4ef16908) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4ef168b8, cond=0x55ce4ef168e0) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4ef168e0, mutex=0x55ce4ef168b8) at pthread_cond_wait.c:655
#3  0x00007f19c5927c95 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c5928177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c5928f11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19dadd76db in start_thread (arg=0x7f19387f6700) at pthread_create.c:463
#8  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f1938ff7700 (LWP 8941)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f1938ff6738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f1938ff66e8, cond=0x7f1938ff6710) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x7f1938ff6710, mutex=0x7f1938ff66e8) at pthread_cond_wait.c:655
#3  0x00007f19c591d999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c591d9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c58f84db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f19c59294d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f19dadd76db in start_thread (arg=0x7f1938ff7700) at pthread_create.c:463
#11 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f19497fa700 (LWP 8940)):
#0  0x00007f19b5db67e8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#1  0x00007f19b5db971b in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f19b5db9ab9 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#3  0x00007f19b5dba33f in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#4  0x00007f19be83c108 in pa_mainloop_dispatch () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f19be83c4de in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f19be83c560 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f19be84a3c9 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#8  0x00007f19b5dca318 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#9  0x00007f19dadd76db in start_thread (arg=0x7f19497fa700) at pthread_create.c:463
#10 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f1949ffb700 (LWP 8939)):
#0  0x00007f19daddded9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f1949ffa5d0, expected=0, futex_word=0x7f1949ffa758) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f19daddded9 in __pthread_cond_wait_common (abstime=0x7f1949ffa670, mutex=0x7f1949ffa708, cond=0x7f1949ffa730) at pthread_cond_wait.c:533
#2  0x00007f19daddded9 in __pthread_cond_timedwait (cond=0x7f1949ffa730, mutex=0x7f1949ffa708, abstime=0x7f1949ffa670) at pthread_cond_wait.c:667
#3  0x00007f19c5956652 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c591d91e in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c58f852b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f19c59294d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f19dadd76db in start_thread (arg=0x7f1949ffb700) at pthread_create.c:463
#11 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f194a7fc700 (LWP 8938)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4efa4eb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4efa4df8, cond=0x55ce4efa4e90) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4efa4e90, mutex=0x55ce4efa4df8) at pthread_cond_wait.c:655
#3  0x00007f19c60af060 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c5928f11 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19dadd76db in start_thread (arg=0x7f194a7fc700) at pthread_create.c:463
#7  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f194affd700 (LWP 8937)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f194affc738) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f194affc6e8, cond=0x7f194affc710) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x7f194affc710, mutex=0x7f194affc6e8) at pthread_cond_wait.c:655
#3  0x00007f19c591d999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c591d9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c58f84db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f19c59294d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f19dadd76db in start_thread (arg=0x7f194affd700) at pthread_create.c:463
#11 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f194b7fe700 (LWP 8936)):
#0  0x00007f19db3156e3 in __GI___tfind (key=key@entry=0x7f194b7fd0b0, vrootp=vrootp@entry=0x7f19db5e4c48 <root>, compar=compar@entry=0x7f19db228da0 <transcmp>) at tsearch.c:388
#1  0x00007f19db22a3ff in __dcigettext (domainname=0x7f19db3abd14 <_libc_intl_domainname> "libc", msgid1=0x7f19db3ac18a "Bad file descriptor", msgid2=msgid2@entry=0x0, plural=plural@entry=0, n=n@entry=0, category=category@entry=5) at dcigettext.c:570
#2  0x00007f19db228d7f in __GI___dcgettext (domainname=<optimized out>, msgid=<optimized out>, category=category@entry=5) at dcgettext.c:47
#3  0x00007f19db295b28 in __GI___strerror_r (errnum=errnum@entry=9, buf=buf@entry=0x0, buflen=buflen@entry=0) at _strerror.c:71
#4  0x00007f19db295a4f in strerror (errnum=9) at strerror.c:31
#5  0x00007f19bc887b31 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f19bc88946c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#7  0x00007f19bc87f114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f19c58f8ab9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f19c51af978 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f19c51aff2b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f19c5929588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f19dadd76db in start_thread (arg=0x7f194b7fe700) at pthread_create.c:463
#16 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f194bfff700 (LWP 8935)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f194bffe358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f194bffe308, cond=0x7f194bffe330) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x7f194bffe330, mutex=0x7f194bffe308) at pthread_cond_wait.c:655
#3  0x00007f19c591d999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c591d9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c58f84db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f19c51af8c8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f19c51aff1b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f19c5929588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f19dadd76db in start_thread (arg=0x7f194bfff700) at pthread_create.c:463
#13 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f1954ff9700 (LWP 8934)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f1954ff8358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f1954ff8308, cond=0x7f1954ff8330) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x7f1954ff8330, mutex=0x7f1954ff8308) at pthread_cond_wait.c:655
#3  0x00007f19c591d999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c591d9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c58f84db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f19c51af818 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f19c51aff0b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f19c5929588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f19dadd76db in start_thread (arg=0x7f1954ff9700) at pthread_create.c:463
#13 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f19557fa700 (LWP 8933)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f19557f9358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f19557f9308, cond=0x7f19557f9330) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x7f19557f9330, mutex=0x7f19557f9308) at pthread_cond_wait.c:655
#3  0x00007f19c591d999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c591d9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c58f84db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f19c51af768 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f19c51afefb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f19c5929588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f19dadd76db in start_thread (arg=0x7f19557fa700) at pthread_create.c:463
#13 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f1955ffb700 (LWP 8932)):
#0  0x00007f19db308187 in __GI___libc_write (fd=2, buf=0x7f1955ff76e0, nbytes=46) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f19db2831bd in _IO_new_file_write (f=0x7f19db5e4680 <_IO_2_1_stderr_>, data=0x7f1955ff76e0, n=46) at fileops.c:1203
#2  0x00007f19db283b2f in new_do_write (to_do=<optimized out>, data=0x7f1955ff76e0 "[warn] epoll_wait: Descrittore di file errato\n", fp=0x7f19db5e4680 <_IO_2_1_stderr_>) at fileops.c:457
#3  0x00007f19db283b2f in _IO_new_file_xsputn (f=0x7f19db5e4680 <_IO_2_1_stderr_>, data=<optimized out>, n=46) at fileops.c:1277
#4  0x00007f19db256707 in buffered_vfprintf (s=s@entry=0x7f19db5e4680 <_IO_2_1_stderr_>, format=format@entry=0x7f19bc89f6a8 "[%s] %s\n", args=args@entry=0x7f1955ff9ca0) at vfprintf.c:2350
#5  0x00007f19db253726 in _IO_vfprintf_internal (s=s@entry=0x7f19db5e4680 <_IO_2_1_stderr_>, format=0x7f19bc89f6a8 "[%s] %s\n", ap=ap@entry=0x7f1955ff9ca0) at vfprintf.c:1301
#6  0x00007f19db32a4c6 in ___fprintf_chk (fp=0x7f19db5e4680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f19bc8879ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f19bc887b44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f19bc88946c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f19bc87f114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f19c58f8b0d in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f19c51af6b8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f19c51afeeb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f19c5929588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007f19dadd76db in start_thread (arg=0x7f1955ffb700) at pthread_create.c:463
#19 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f19567fc700 (LWP 8931)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f19567fb358) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f19567fb308, cond=0x7f19567fb330) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x7f19567fb330, mutex=0x7f19567fb308) at pthread_cond_wait.c:655
#3  0x00007f19c591d999 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f19c591d9c7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f19c58f84db in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f19c51af608 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f19c51afedb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f19c5929588 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f19dadd76db in start_thread (arg=0x7f19567fc700) at pthread_create.c:463
#13 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f1956ffd700 (LWP 8930)):
#0  0x00007f19db3286ac in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f19db32a474 in ___fprintf_chk (fp=0x7f19db5e58b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f19bc89f6a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f19bc8879ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f19bc887b44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f19bc88946c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f19bc87f114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f19c58f8ab9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f19c58f4da8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f19c591177b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f19c59294d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f19c59255eb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f19dadd76db in start_thread (arg=0x7f1956ffd700) at pthread_create.c:463
#12 0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f195d397700 (LWP 8908)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4ef583b0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4ef58360, cond=0x55ce4ef58388) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4ef58388, mutex=0x55ce4ef58360) at pthread_cond_wait.c:655
#3  0x00007f19dba2d5ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f19dba25c1b in QSemaphore::acquire(int) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f195e3da80c in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#6  0x00007f19dba2c17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f19dadd76db in start_thread (arg=0x7f195d397700) at pthread_create.c:463
#8  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f195ee37700 (LWP 8906)):
#0  0x00007f19ceeda644 in g_mutex_unlock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f19cee93b18 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f19cee944fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f19cee946dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f19dbc638ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f19dbc0890a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f19dba2723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f19dba2c17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f19dadd76db in start_thread (arg=0x7f195ee37700) at pthread_create.c:463
#9  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f1967fff700 (LWP 8899)):
#0  0x00007f19db30cbf9 in __GI___poll (fds=0x7f196002b690, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f19cee945c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f19cee946dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f19dbc638ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f19dbc0890a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f19dba2723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f19dba2c17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f19dadd76db in start_thread (arg=0x7f1967fff700) at pthread_create.c:463
#8  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f1980cf7700 (LWP 8895)):
#0  0x00007f19ceeda629 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f19cee93fec in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f19cee94570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f19cee946dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f19dbc638ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f19dbc0890a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f19dba2723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f19dba2c17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f19dadd76db in start_thread (arg=0x7f1980cf7700) at pthread_create.c:463
#9  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f1981ba7700 (LWP 8894)):
#0  0x00007f19db30cbf9 in __GI___poll (fds=0x7f1968002990, nfds=1, timeout=9095) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f19cee945c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f19cee946dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f19dbc638ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f19dbc0890a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f19dba2723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f19dba2c17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f19dadd76db in start_thread (arg=0x7f1981ba7700) at pthread_create.c:463
#8  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f1982dbe700 (LWP 8893)):
#0  0x00007f19db3080b4 in __GI___libc_read (fd=18, buf=0x7f1982dbd950, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f19ceed92b0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f19cee940b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f19cee94570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f19cee94962 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f19ae75f276 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f19ceebc175 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f19dadd76db in start_thread (arg=0x7f1982dbe700) at pthread_create.c:463
#8  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f19835bf700 (LWP 8892)):
#0  0x00007f19db30cbf9 in __GI___poll (fds=0x55ce4eacb9b0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f19cee945c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f19cee946dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f19cee94721 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f19ceebc175 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f19dadd76db in start_thread (arg=0x7f19835bf700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f1983fff700 (LWP 8891)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4ea48b88) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4ea48b38, cond=0x55ce4ea48b60) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4ea48b60, mutex=0x55ce4ea48b38) at pthread_cond_wait.c:655
#3  0x00007f199c85fa0b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f199c85f607 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f19dadd76db in start_thread (arg=0x7f1983fff700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f1990f55700 (LWP 8890)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4e7a94a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4e7a9450, cond=0x55ce4e7a9478) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4e7a9478, mutex=0x55ce4e7a9450) at pthread_cond_wait.c:655
#3  0x00007f199c85fa0b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f199c85f607 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f19dadd76db in start_thread (arg=0x7f1990f55700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f1991756700 (LWP 8889)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4e7a8da4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4e7a8d50, cond=0x55ce4e7a8d78) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4e7a8d78, mutex=0x55ce4e7a8d50) at pthread_cond_wait.c:655
#3  0x00007f199c85fa0b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f199c85f607 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f19dadd76db in start_thread (arg=0x7f1991756700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f1991f57700 (LWP 8888)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4e6e7578) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4e6e7528, cond=0x55ce4e6e7550) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4e6e7550, mutex=0x55ce4e6e7528) at pthread_cond_wait.c:655
#3  0x00007f199c85fa0b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f199c85f607 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f19dadd76db in start_thread (arg=0x7f1991f57700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f1992ed7700 (LWP 8887)):
#0  0x00007f19daddd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ce4e7a4b4c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f19daddd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55ce4e7a4af8, cond=0x55ce4e7a4b20) at pthread_cond_wait.c:502
#2  0x00007f19daddd9f3 in __pthread_cond_wait (cond=0x55ce4e7a4b20, mutex=0x55ce4e7a4af8) at pthread_cond_wait.c:655
#3  0x00007f199c85fa0b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f199c85f607 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f19dadd76db in start_thread (arg=0x7f1992ed7700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f199ee6f700 (LWP 8885)):
#0  0x00007f19db30cbf9 in __GI___poll (fds=0x7f1998011f70, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f19cee945c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f19cee946dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f19dbc638ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f19dbc0890a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f19dba2723a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f19d9e0dd45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f19dba2c17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f19dadd76db in start_thread (arg=0x7f199ee6f700) at pthread_create.c:463
#9  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f19a614f700 (LWP 8884)):
#0  0x00007f19db30cbf9 in __GI___poll (fds=0x7f19a614e928, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f19ce2b3747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f19ce2b536a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f19a7e6a5e9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f19dba2c17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f19dadd76db in start_thread (arg=0x7f19a614f700) at pthread_create.c:463
#6  0x00007f19db31988f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f19de457b80 (LWP 8881)):
[KCrash Handler]
#6  0x00007f19db236e97 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f19db238801 in __GI_abort () at abort.c:79
#8  0x00007f19db67c957 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#9  0x00007f19db682ae6 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00007f19db682b21 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#11 0x00007f19db682d54 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#12 0x00007f19c34f3ade in  () at /usr/lib/x86_64-linux-gnu/libxapian.so.30
#13 0x00007f19c34f5878 in  () at /usr/lib/x86_64-linux-gnu/libxapian.so.30
#14 0x00007f19c34f842a in  () at /usr/lib/x86_64-linux-gnu/libxapian.so.30
#15 0x00007f19c34f8683 in  () at /usr/lib/x86_64-linux-gnu/libxapian.so.30
#16 0x00007f19c34e3d03 in  () at /usr/lib/x86_64-linux-gnu/libxapian.so.30
#17 0x00007f19c3437ef5 in Xapian::Database::get_termfreq(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const () at /usr/lib/x86_64-linux-gnu/libxapian.so.30
#18 0x00007f19d597ef0b in  () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiSearchPIM.so.5
#19 0x00007f19d597f1cd in  () at /usr/lib/x86_64-linux-gnu/libKF5AkonadiSearchPIM.so.5
#20 0x00007f19ddbf716a in  () at /usr/lib/x86_64-linux-gnu/libkmailprivate.so.5
#21 0x00007f19dbc3966f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f19dd0c1fdc in KJob::result(KJob*, KJob::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#23 0x00007f19dd0c2b11 in KJob::finishJob(bool) () at /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#24 0x00007f19dbc46074 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f19dbc3a07b in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f19dc99483c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f19dc99c104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f19dbc0a8d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f19dbc62d2e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f19dbc634f1 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f19cee94417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f19cee94650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f19cee946dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f19dbc6388f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f19dbc0890a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007f19dbc119b4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x000055ce4df8f7cd in  ()
#38 0x00007f19db219b97 in __libc_start_main (main=0x55ce4df8e840, argc=3, argv=0x7ffc6966ec48, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc6966ec38) at ../csu/libc-start.c:310
#39 0x000055ce4df8f8fa in _start ()

Reported using DrKonqi