Application: kmail (5.10.3)

Qt Version: 5.12.0
Frameworks Version: 5.55.0
Operating System: Linux 4.15.0-46-generic x86_64
Distribution: KDE neon User Edition 5.15

-- Information about the crash:
Just clicked on the kmail icon, kmail crashed. Not sure if it makes any difference but I also use the kmail resource that allows you to link you gmail contacts to kde so that all my contacts are available to kmail.

The crash can be reproduced sometimes.

-- 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 0x7f55a5cdcbc0 (LWP 26520))]

Thread 24 (Thread 0x7f5583bd9700 (LWP 26625)):
#0  0x00007f55d91df0b4 in __GI___libc_read (fd=24, buf=0x7f5583bd87d0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f55ccb15cd0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f55ccad1027 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f55ccad14e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f55ccad164c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f55d9b2615b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f557c005290, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f55d9ac764a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5583bd89e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007f55d98ef41a in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#8  0x00007f55d98f0bc2 in QThreadPrivate::start(void*) (arg=0x55fb89ebbe00) at thread/qthread_unix.cpp:361
#9  0x00007f55d8eb76db in start_thread (arg=0x7f5583bd9700) at pthread_create.c:463
#10 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f548ffff700 (LWP 26586)):
#0  0x00007f55ccb17049 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f55ccad10c6 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f55ccad15c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f55ccad164c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f55d9b2615b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5488000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f55d9ac764a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f548fffe9e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007f55d98ef41a in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007f55d98f0bc2 in QThreadPrivate::start(void*) (arg=0x55fb8d11b990) at thread/qthread_unix.cpp:361
#8  0x00007f55d8eb76db in start_thread (arg=0x7f548ffff700) at pthread_create.c:463
#9  0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f551a3ee700 (LWP 26585)):
#0  0x00007f55d8ebd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f55bf0c8fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f55d8ebd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f55bf0c8f68, cond=0x7f55bf0c8f90) at pthread_cond_wait.c:502
#2  0x00007f55d8ebd9f3 in __pthread_cond_wait (cond=0x7f55bf0c8f90, mutex=0x7f55bf0c8f68) at pthread_cond_wait.c:655
#3  0x00007f55bedd2844 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f55bedd2889 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f55d8eb76db in start_thread (arg=0x7f551a3ee700) at pthread_create.c:463
#6  0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f5521fe6700 (LWP 26572)):
#0  0x00007f55d8ebded9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f5521fe5710, expected=0, futex_word=0x7f5521fe58f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f55d8ebded9 in __pthread_cond_wait_common (abstime=0x7f5521fe57b0, mutex=0x7f5521fe58a8, cond=0x7f5521fe58d0) at pthread_cond_wait.c:533
#2  0x00007f55d8ebded9 in __pthread_cond_timedwait (cond=0x7f5521fe58d0, mutex=0x7f5521fe58a8, abstime=0x7f5521fe57b0) at pthread_cond_wait.c:667
#3  0x00007f55c3b10177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c3b10ada in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3b10bc2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3ace851 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3ad16b6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3ad1974 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f5521fe6700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f55227e7700 (LWP 26558)):
#0  0x00007f55d8ebd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f55227e6908) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f55d8ebd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f55227e68b8, cond=0x7f55227e68e0) at pthread_cond_wait.c:502
#2  0x00007f55d8ebd9f3 in __pthread_cond_wait (cond=0x7f55227e68e0, mutex=0x7f55227e68b8) at pthread_cond_wait.c:655
#3  0x00007f55c3b100a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c3b10ae8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3b10b7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3ace868 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3ad16b6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3ad19f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f55227e7700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f554dffb700 (LWP 26557)):
#0  0x00007f55d91df0b4 in __GI___libc_read (fd=72, buf=0x7f554dffa81e, nbytes=10) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f55b3b99021 in pa_read () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f55bb774a2e in pa_mainloop_prepare () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f55bb7754a0 in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f55bb775560 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f55bb7833c9 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f55b3bc8318 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f55d8eb76db in start_thread (arg=0x7f554dffb700) at pthread_create.c:463
#8  0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f554e7fc700 (LWP 26556)):
#0  0x00007f55d8ebded9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f554e7fb700, expected=0, futex_word=0x7f554e7fb8e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f55d8ebded9 in __pthread_cond_wait_common (abstime=0x7f554e7fb7a0, mutex=0x7f554e7fb898, cond=0x7f554e7fb8c0) at pthread_cond_wait.c:533
#2  0x00007f55d8ebded9 in __pthread_cond_timedwait (cond=0x7f554e7fb8c0, mutex=0x7f554e7fb898, abstime=0x7f554e7fb7a0) at pthread_cond_wait.c:667
#3  0x00007f55c3b10177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c3b10ada in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3a8ab70 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3aad49b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3adfd21 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55d8eb76db in start_thread (arg=0x7f554e7fc700) at pthread_create.c:463
#10 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f554effd700 (LWP 26555)):
#0  0x00007f55d8ebd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55fb89fa3888) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f55d8ebd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55fb89fa37c8, cond=0x55fb89fa3860) at pthread_cond_wait.c:502
#2  0x00007f55d8ebd9f3 in __pthread_cond_wait (cond=0x55fb89fa3860, mutex=0x55fb89fa37c8) at pthread_cond_wait.c:655
#3  0x00007f55c3b100a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c43d9b28 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3ae12df in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55d8eb76db in start_thread (arg=0x7f554effd700) at pthread_create.c:463
#8  0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f554f7fe700 (LWP 26554)):
#0  0x00007f55d91ff6ac in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f55d9201474 in ___fprintf_chk (fp=0x7f55d94bc8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f55b91a36a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f55b918b9ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f55b918bb44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f55b918d46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f55b9183114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f55c3b167dd in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3aad49b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3adfd21 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f554f7fe700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f554ffff700 (LWP 26553)):
#0  0x00007f55d8ebd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f554fffe8c8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f55d8ebd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f554fffe878, cond=0x7f554fffe8a0) at pthread_cond_wait.c:502
#2  0x00007f55d8ebd9f3 in __pthread_cond_wait (cond=0x7f554fffe8a0, mutex=0x7f554fffe878) at pthread_cond_wait.c:655
#3  0x00007f55c3b100a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c3b10ae8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3b10b7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3a8ab5f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3aad49b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3adfd21 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f554ffff700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f5568ff9700 (LWP 26552)):
#0  0x00007f55d8ebd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f5568ff8908) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f55d8ebd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f5568ff88b8, cond=0x7f5568ff88e0) at pthread_cond_wait.c:502
#2  0x00007f55d8ebd9f3 in __pthread_cond_wait (cond=0x7f5568ff88e0, mutex=0x7f5568ff88b8) at pthread_cond_wait.c:655
#3  0x00007f55c3b100a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c3b10ae8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3b10b7f in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3ace868 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3ad16b6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3ad19b4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f5568ff9700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f55697fa700 (LWP 26551)):
#0  0x00007f55d91df187 in __GI___libc_write (fd=2, buf=0x7f55697f6c20, nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f55d915a1bd in _IO_new_file_write (f=0x7f55d94bb680 <_IO_2_1_stderr_>, data=0x7f55697f6c20, n=39) at fileops.c:1203
#2  0x00007f55d915ab2f in new_do_write (to_do=<optimized out>, data=0x7f55697f6c20 "[warn] epoll_wait: Bad file descriptor\n", fp=0x7f55d94bb680 <_IO_2_1_stderr_>) at fileops.c:457
#3  0x00007f55d915ab2f in _IO_new_file_xsputn (f=0x7f55d94bb680 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1277
#4  0x00007f55d912d707 in buffered_vfprintf (s=s@entry=0x7f55d94bb680 <_IO_2_1_stderr_>, format=format@entry=0x7f55b91a36a8 "[%s] %s\n", args=args@entry=0x7f55697f91e0) at vfprintf.c:2350
#5  0x00007f55d912a726 in _IO_vfprintf_internal (s=s@entry=0x7f55d94bb680 <_IO_2_1_stderr_>, format=0x7f55b91a36a8 "[%s] %s\n", ap=ap@entry=0x7f55697f91e0) at vfprintf.c:1301
#6  0x00007f55d92014c6 in ___fprintf_chk (fp=0x7f55d94bb680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f55b918b9ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f55b918bb44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f55b918d46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f55b9183114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f55c3b168c4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f55c3aad49b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f55c3465754 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f55c3adfe78 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f55d8eb76db in start_thread (arg=0x7f55697fa700) at pthread_create.c:463
#17 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f5569ffb700 (LWP 26550)):
#0  0x00007f55d8ebded9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f5569ffa710, expected=0, futex_word=0x7f5569ffa8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f55d8ebded9 in __pthread_cond_wait_common (abstime=0x7f5569ffa7b0, mutex=0x7f5569ffa8a8, cond=0x7f5569ffa8d0) at pthread_cond_wait.c:533
#2  0x00007f55d8ebded9 in __pthread_cond_timedwait (cond=0x7f5569ffa8d0, mutex=0x7f5569ffa8a8, abstime=0x7f5569ffa7b0) at pthread_cond_wait.c:667
#3  0x00007f55c3b10177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c3b10ada in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3b10bc2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3ace851 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3ad16b6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3ad1974 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f5569ffb700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f556a7fc700 (LWP 26549)):
#0  0x00007f55d8ebded9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f556a7fb710, expected=0, futex_word=0x7f556a7fb8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f55d8ebded9 in __pthread_cond_wait_common (abstime=0x7f556a7fb7b0, mutex=0x7f556a7fb8a8, cond=0x7f556a7fb8d0) at pthread_cond_wait.c:533
#2  0x00007f55d8ebded9 in __pthread_cond_timedwait (cond=0x7f556a7fb8d0, mutex=0x7f556a7fb8a8, abstime=0x7f556a7fb7b0) at pthread_cond_wait.c:667
#3  0x00007f55c3b10177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c3b10ada in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3b10bc2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3ace851 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3ad16b6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3ad1974 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f556a7fc700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f556affd700 (LWP 26548)):
#0  0x00007f55d8ebded9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f556affc710, expected=0, futex_word=0x7f556affc8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f55d8ebded9 in __pthread_cond_wait_common (abstime=0x7f556affc7b0, mutex=0x7f556affc8a8, cond=0x7f556affc8d0) at pthread_cond_wait.c:533
#2  0x00007f55d8ebded9 in __pthread_cond_timedwait (cond=0x7f556affc8d0, mutex=0x7f556affc8a8, abstime=0x7f556affc7b0) at pthread_cond_wait.c:667
#3  0x00007f55c3b10177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c3b10ada in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3b10bc2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3ace851 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3ad16b6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3ad1974 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f556affd700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f556b7fe700 (LWP 26547)):
#0  0x00007f55d8ebded9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f556b7fd710, expected=0, futex_word=0x7f556b7fd8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f55d8ebded9 in __pthread_cond_wait_common (abstime=0x7f556b7fd7b0, mutex=0x7f556b7fd8a8, cond=0x7f556b7fd8d0) at pthread_cond_wait.c:533
#2  0x00007f55d8ebded9 in __pthread_cond_timedwait (cond=0x7f556b7fd8d0, mutex=0x7f556b7fd8a8, abstime=0x7f556b7fd7b0) at pthread_cond_wait.c:667
#3  0x00007f55c3b10177 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f55c3b10ada in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f55c3b10bc2 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f55c3ace851 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3ad16b6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3ad1974 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f556b7fe700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f556bfff700 (LWP 26546)):
#0  0x00007f55d91ff6ac in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f55d9201474 in ___fprintf_chk (fp=0x7f55d94bc8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f55b91a36a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f55b918b9ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f55b918bb44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f55b918d46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f55b9183114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f55c3b168c4 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3aad49b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3ad4f44 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3adfe78 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f55d8eb76db in start_thread (arg=0x7f556bfff700) at pthread_create.c:463
#12 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f5581215700 (LWP 26544)):
#0  0x00007f55d91ff6ac in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f55d9201474 in ___fprintf_chk (fp=0x7f55d94bc8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f55b91a36a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f55b918b9ad in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f55b918bb44 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f55b918d46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f55b9183114 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f55c3b16789 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f55c3aad49b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f55c3adfd21 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f55c3b12cd1 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f55d8eb76db in start_thread (arg=0x7f5581215700) at pthread_create.c:463
#11 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f559933f700 (LWP 26525)):
#0  0x00007f55d91e3bf9 in __GI___poll (fds=0x7f5584062500, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f55ccad1539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f55ccad164c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f55d9b2615b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5584000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f55d9ac764a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f559933e9e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f55d98ef41a in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f55d98f0bc2 in QThreadPrivate::start(void*) (arg=0x55fb89c720f0) at thread/qthread_unix.cpp:361
#7  0x00007f55d8eb76db in start_thread (arg=0x7f559933f700) at pthread_create.c:463
#8  0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f5599b40700 (LWP 26524)):
[KCrash Handler]
#6  0x00007f55d910de97 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f55d910f801 in __GI_abort () at abort.c:79
#8  0x00007f55d954c8b7 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#9  0x00007f55d9552a06 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00007f55d9552a41 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#11 0x00007f55d98cc61b in qTerminate() () at global/qglobal.cpp:3190
#12 0x00007f55d98f0d4b in QThreadPrivate::start(void*) (arg=0x55fb89cc5a40) at thread/qthread_unix.cpp:373
#13 0x00007f55d8eb76db in start_thread (arg=0x7f5599b40700) at pthread_create.c:463
#14 0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f559a9df700 (LWP 26523)):
#0  0x00007f55d91e3bf9 in __GI___poll (fds=0x7f558c004a10, nfds=1, timeout=9880) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f55ccad1539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f55ccad164c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f55d9b2615b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f558c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f55d9ac764a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f559a9de9e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f55d98ef41a in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f55d98f0bc2 in QThreadPrivate::start(void*) (arg=0x55fb89c16210) at thread/qthread_unix.cpp:361
#7  0x00007f55d8eb76db in start_thread (arg=0x7f559a9df700) at pthread_create.c:463
#8  0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f559bbf0700 (LWP 26522)):
#0  0x00007f55d91e3bf9 in __GI___poll (fds=0x7f5594048b50, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f55ccad1539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f55ccad164c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f55d9b2615b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5594000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f55d9ac764a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f559bbef9b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f55d98ef41a in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007f55d7ab2015 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f55d98f0bc2 in QThreadPrivate::start(void*) (arg=0x7f55d7d29d80) at thread/qthread_unix.cpp:361
#8  0x00007f55d8eb76db in start_thread (arg=0x7f559bbf0700) at pthread_create.c:463
#9  0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f55a47b9700 (LWP 26521)):
#0  0x00007f55d91e3bf9 in __GI___poll (fds=0x7f55a47b88f8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f55cbefb747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f55cbefd36a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f55a54ac32a in QXcbEventQueue::run() (this=0x55fb897f76d0) at qxcbeventqueue.cpp:225
#4  0x00007f55d98f0bc2 in QThreadPrivate::start(void*) (arg=0x55fb897f76d0) at thread/qthread_unix.cpp:361
#5  0x00007f55d8eb76db in start_thread (arg=0x7f55a47b9700) at pthread_create.c:463
#6  0x00007f55d91f088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f55a5cdcbc0 (LWP 26520)):
#0  0x00007f55d8ebd9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7ffef5f4a108) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f55d8ebd9f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55fb897e8c78, cond=0x7ffef5f4a0e0) at pthread_cond_wait.c:502
#2  0x00007f55d8ebd9f3 in __pthread_cond_wait (cond=0x7ffef5f4a0e0, mutex=0x55fb897e8c78) at pthread_cond_wait.c:655
#3  0x00007f55cbefb952 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f55cbefd06f in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#5  0x00007f55cbefd180 in xcb_wait_for_reply () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#6  0x00007f55a549ca78 in QXcbWindow::netWmStates() (this=this@entry=0x55fb8a087de0) at qxcbwindow.cpp:936
#7  0x00007f55a549cd46 in QXcbWindow::handlePropertyNotifyEvent(xcb_property_notify_event_t const*) (this=0x55fb8a087de0, event=<optimized out>) at qxcbwindow.cpp:2257
#8  0x00007f55a5486e5c in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) (this=this@entry=0x55fb897e3600, event=event@entry=0x7f559c007970) at qxcbconnection.cpp:660
#9  0x00007f55a5487493 in QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55fb897e3600, flags=flags@entry=...) at qxcbconnection.cpp:1030
#10 0x00007f55a54ad303 in xcbSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at qxcbeventdispatcher.cpp:103
#11 0x00007f55ccad1387 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f55ccad15c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f55ccad164c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007f55d9b2613f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55fb8982a650, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#15 0x00007f55d9ac764a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffef5f4a510, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#16 0x00007f55d9ad0800 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1364
#17 0x000055fb87e2985d in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./src/main.cpp:172

Reported using DrKonqi