Application: kdeinit5 (5.0.97)

Qt Version: 5.9.2
Frameworks Version: 5.42.0
Operating System: Linux 4.16.0-rc5+ x86_64
Distribution: Debian GNU/Linux testing/unstable

-- Information about the crash:
even though I hadn't been running konqueror in previous session, found a crash after  starting plasmashell after a reboot.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Konqueror (kdeinit5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0981f54780 (LWP 4242))]

Thread 27 (Thread 0x7f08ecff9700 (LWP 4506)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975f9362c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975f935d8, cond=0x55f975f93600) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975f93600, mutex=0x55f975f935d8) at pthread_cond_wait.c:655
#3  0x00007f0929c86ba5 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c87087 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c87e21 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f097e4f45aa in start_thread (arg=0x7f08ecff9700) at pthread_create.c:463
#8  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f08ed7fa700 (LWP 4500)):
#0  0x00007f0972a24165 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#1  0x00007f0972a2509d in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f0972a25449 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#3  0x00007f0972a25ccf in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#4  0x00007f0972e8e338 in pa_mainloop_dispatch () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f0972e8e70e in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f0972e8e790 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#7  0x00007f0972e9c5f9 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#8  0x00007f0972a35c58 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#9  0x00007f097e4f45aa in start_thread (arg=0x7f08ed7fa700) at pthread_create.c:463
#10 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f08edffb700 (LWP 4499)):
#0  0x00007f097e4fa81a in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f08edffa9d0, expected=0, futex_word=0x7f08edffab58) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f097e4fa81a in __pthread_cond_wait_common (abstime=0x7f08edffaa70, mutex=0x7f08edffab08, cond=0x7f08edffab30) at pthread_cond_wait.c:533
#2  0x00007f097e4fa81a in __pthread_cond_timedwait (cond=0x7f08edffab30, mutex=0x7f08edffab08, abstime=0x7f08edffaa70) at pthread_cond_wait.c:667
#3  0x00007f0929cb5552 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c7c82e in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c574bb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f0929c883e6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f097e4f45aa in start_thread (arg=0x7f08edffb700) at pthread_create.c:463
#11 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f08ee7fc700 (LWP 4498)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975f2d8b8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975f2d7f8, cond=0x55f975f2d890) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975f2d890, mutex=0x55f975f2d7f8) at pthread_cond_wait.c:655
#3  0x00007f092a40c8b0 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c87e21 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f097e4f45aa in start_thread (arg=0x7f08ee7fc700) at pthread_create.c:463
#7  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f08eeffd700 (LWP 4497)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975f9362c) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975f935d8, cond=0x55f975f93600) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975f93600, mutex=0x55f975f935d8) at pthread_cond_wait.c:655
#3  0x00007f0929c86ba5 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c87087 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c87e21 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f097e4f45aa in start_thread (arg=0x7f08eeffd700) at pthread_create.c:463
#8  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f08ef7fe700 (LWP 4496)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f08ef7fdb38) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f08ef7fdae8, cond=0x7f08ef7fdb10) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x7f08ef7fdb10, mutex=0x7f08ef7fdae8) at pthread_cond_wait.c:655
#3  0x00007f0929c7c8a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c7c8d7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c5746b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f0929c883e6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f097e4f45aa in start_thread (arg=0x7f08ef7fe700) at pthread_create.c:463
#11 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f08effff700 (LWP 4495)):
#0  0x00007f097e4fa81a in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f08efffebe0, expected=0, futex_word=0x7f0910004500) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f097e4fa81a in __pthread_cond_wait_common (abstime=0x7f08efffec80, mutex=0x7f09100044b0, cond=0x7f09100044d8) at pthread_cond_wait.c:533
#2  0x00007f097e4fa81a in __pthread_cond_timedwait (cond=0x7f09100044d8, mutex=0x7f09100044b0, abstime=0x7f08efffec80) at pthread_cond_wait.c:667
#3  0x00007f0929cb5552 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c8b6a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c8bc0b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f097e4f45aa in start_thread (arg=0x7f08effff700) at pthread_create.c:463
#8  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f0908ff9700 (LWP 4494)):
#0  0x00007f097e4fa81a in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f0908ff8be0, expected=0, futex_word=0x7f0910004504) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f097e4fa81a in __pthread_cond_wait_common (abstime=0x7f0908ff8c80, mutex=0x7f09100044b0, cond=0x7f09100044d8) at pthread_cond_wait.c:533
#2  0x00007f097e4fa81a in __pthread_cond_timedwait (cond=0x7f09100044d8, mutex=0x7f09100044b0, abstime=0x7f0908ff8c80) at pthread_cond_wait.c:667
#3  0x00007f0929cb5552 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c8b6a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c8bc0b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f097e4f45aa in start_thread (arg=0x7f0908ff9700) at pthread_create.c:463
#8  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f09097fa700 (LWP 4493)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f09097f9b38) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f09097f9ae8, cond=0x7f09097f9b10) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x7f09097f9b10, mutex=0x7f09097f9ae8) at pthread_cond_wait.c:655
#3  0x00007f0929c7c8a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c7c8d7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c5746b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f0929c883e6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f097e4f45aa in start_thread (arg=0x7f09097fa700) at pthread_create.c:463
#11 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f0909ffb700 (LWP 4492)):
#0  0x00007f0980081f1b in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f0980083bd4 in ___fprintf_chk (fp=0x7f09803348b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f0927b55848 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f0927b3da5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f0927b3dc34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f0927b3f588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f0927b35329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f0929c57a49 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f092950f758 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f092950fd0b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f0929c88498 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f097e4f45aa in start_thread (arg=0x7f0909ffb700) at pthread_create.c:463
#14 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f090a7fc700 (LWP 4491)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f090a7fb758) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f090a7fb708, cond=0x7f090a7fb730) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x7f090a7fb730, mutex=0x7f090a7fb708) at pthread_cond_wait.c:655
#3  0x00007f0929c7c8a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c7c8d7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c5746b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f092950f6a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f092950fcfb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f0929c88498 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f097e4f45aa in start_thread (arg=0x7f090a7fc700) at pthread_create.c:463
#13 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f090affd700 (LWP 4490)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f090affc758) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f090affc708, cond=0x7f090affc730) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x7f090affc730, mutex=0x7f090affc708) at pthread_cond_wait.c:655
#3  0x00007f0929c7c8a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c7c8d7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c5746b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f092950f5f8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f092950fceb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f0929c88498 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f097e4f45aa in start_thread (arg=0x7f090affd700) at pthread_create.c:463
#13 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f090b7fe700 (LWP 4489)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f090b7fd758) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f090b7fd708, cond=0x7f090b7fd730) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x7f090b7fd730, mutex=0x7f090b7fd708) at pthread_cond_wait.c:655
#3  0x00007f0929c7c8a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c7c8d7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c5746b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f092950f548 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f092950fcdb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f0929c88498 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f097e4f45aa in start_thread (arg=0x7f090b7fe700) at pthread_create.c:463
#13 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f090bfff700 (LWP 4488)):
#0  0x00007f0980066167 in __GI___libc_write (fd=2, buf=0x7f090bffbad0, nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f097fff74bd in _IO_new_file_write (f=0x7f0980333680 <_IO_2_1_stderr_>, data=0x7f090bffbad0, n=39) at fileops.c:1203
#2  0x00007f097fff67df in new_do_write (fp=fp@entry=0x7f0980333680 <_IO_2_1_stderr_>, data=data@entry=0x7f090bffbad0 "[warn] epoll_wait: Bad file descriptor\n", to_do=to_do@entry=39) at fileops.c:457
#3  0x00007f097fff7c4e in _IO_new_file_xsputn (f=0x7f0980333680 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1277
#4  0x00007f097ffce2fb in buffered_vfprintf (s=s@entry=0x7f0980333680 <_IO_2_1_stderr_>, format=format@entry=0x7f0927b55848 "[%s] %s\n", args=args@entry=0x7f090bffe090) at vfprintf.c:2350
#5  0x00007f097ffcb5fe in _IO_vfprintf_internal (s=s@entry=0x7f0980333680 <_IO_2_1_stderr_>, format=0x7f0927b55848 "[%s] %s\n", ap=ap@entry=0x7f090bffe090) at vfprintf.c:1301
#6  0x00007f0980083c26 in ___fprintf_chk (fp=0x7f0980333680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f0927b3da5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f0927b3dc34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f0927b3f588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f0927b35329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f0929c57a49 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f092950f498 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f092950fccb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f0929c88498 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007f097e4f45aa in start_thread (arg=0x7f090bfff700) at pthread_create.c:463
#19 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f09188c7700 (LWP 4487)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f09188c6758) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x7f09188c6708, cond=0x7f09188c6730) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x7f09188c6730, mutex=0x7f09188c6708) at pthread_cond_wait.c:655
#3  0x00007f0929c7c8a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f0929c7c8d7 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f0929c5746b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f092950f3e8 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f092950fcbb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f0929c88498 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f097e4f45aa in start_thread (arg=0x7f09188c7700) at pthread_create.c:463
#13 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f09190c8700 (LWP 4486)):
#0  0x00007f0980081f1b in __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f0980083bd4 in ___fprintf_chk (fp=0x7f09803348b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f0927b55848 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f0927b3da5a in event_logv_ () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f0927b3dc34 in event_warn () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f0927b3f588 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f0927b35329 in event_base_loop () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f0929c57a49 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f0929c53d38 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f0929c7070b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f0929c883e6 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f0929c844fb in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f097e4f45aa in start_thread (arg=0x7f09190c8700) at pthread_create.c:463
#12 0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f09517fa700 (LWP 4270)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975b8dab8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975b8da68, cond=0x55f975b8da90) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975b8da90, mutex=0x55f975b8da68) at pthread_cond_wait.c:655
#3  0x00007f096200f61b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f096200f347 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f097e4f45aa in start_thread (arg=0x7f09517fa700) at pthread_create.c:463
#6  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f0951ffb700 (LWP 4269)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975a4ceb0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975a4ce60, cond=0x55f975a4ce88) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975a4ce88, mutex=0x55f975a4ce60) at pthread_cond_wait.c:655
#3  0x00007f096200f61b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f096200f347 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f097e4f45aa in start_thread (arg=0x7f0951ffb700) at pthread_create.c:463
#6  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f09527fc700 (LWP 4268)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975a4ceb0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975a4ce60, cond=0x55f975a4ce88) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975a4ce88, mutex=0x55f975a4ce60) at pthread_cond_wait.c:655
#3  0x00007f096200f61b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f096200f347 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f097e4f45aa in start_thread (arg=0x7f09527fc700) at pthread_create.c:463
#6  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f0952ffd700 (LWP 4267)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975a4cdc8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975a4cd78, cond=0x55f975a4cda0) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975a4cda0, mutex=0x55f975a4cd78) at pthread_cond_wait.c:655
#3  0x00007f096200f61b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f096200f347 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f097e4f45aa in start_thread (arg=0x7f0952ffd700) at pthread_create.c:463
#6  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f09537fe700 (LWP 4266)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975a4cdc8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975a4cd78, cond=0x55f975a4cda0) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975a4cda0, mutex=0x55f975a4cd78) at pthread_cond_wait.c:655
#3  0x00007f096200f61b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f096200f347 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f097e4f45aa in start_thread (arg=0x7f09537fe700) at pthread_create.c:463
#6  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f0953fff700 (LWP 4265)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975a4cdc8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975a4cd78, cond=0x55f975a4cda0) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975a4cda0, mutex=0x55f975a4cd78) at pthread_cond_wait.c:655
#3  0x00007f096200f61b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f096200f347 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f097e4f45aa in start_thread (arg=0x7f0953fff700) at pthread_create.c:463
#6  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f095897e700 (LWP 4264)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975a4d410) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975a4d3c0, cond=0x55f975a4d3e8) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975a4d3e8, mutex=0x55f975a4d3c0) at pthread_cond_wait.c:655
#3  0x00007f096200f61b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f096200f347 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f097e4f45aa in start_thread (arg=0x7f095897e700) at pthread_create.c:463
#6  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f0960c03700 (LWP 4263)):
#0  0x00007f097e4fa4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f975a4bfe0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f097e4fa4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f975a4bf90, cond=0x55f975a4bfb8) at pthread_cond_wait.c:502
#2  0x00007f097e4fa4ec in __pthread_cond_wait (cond=0x55f975a4bfb8, mutex=0x55f975a4bf90) at pthread_cond_wait.c:655
#3  0x00007f096200f61b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f096200f347 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f097e4f45aa in start_thread (arg=0x7f0960c03700) at pthread_create.c:463
#6  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f0963fff700 (LWP 4256)):
#0  0x00007f098006a5d9 in __GI___poll (fds=0x7f095c013420, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f097c660119 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f097c66022c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f098061b10b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f09805c02aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f09803df35a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0977c12e45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f09803e422d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f097e4f45aa in start_thread (arg=0x7f0963fff700) at pthread_create.c:463
#9  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f096a9a7700 (LWP 4255)):
#0  0x00007f098006a5d9 in __GI___poll (fds=0x7f096a9a6d28, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f09813e30f7 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f09813e4d1a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f096cb0a029 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f09803e422d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f097e4f45aa in start_thread (arg=0x7f096a9a7700) at pthread_create.c:463
#6  0x00007f0980074cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f0981f54780 (LWP 4242)):
[KCrash Handler]
#6  0x00007f096fc16058 in KonqView::url() const () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#7  0x00007f096fc4b867 in KonqMainWindow::isPreloaded() const () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#8  0x00007f096fc80ed9 in KonqSessionManager::saveCurrentSessionToFile(KConfig*, QList<KonqMainWindow*> const&) () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#9  0x00007f096fc81185 in KonqSessionManager::autoSaveSession() () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#10 0x00007f09805f0d55 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f09805fd827 in QTimer::timeout(QTimer::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f09805fdb88 in QTimer::timerEvent(QTimerEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f09805f187b in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f097ea6263c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f097ea69f04 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f09805c2258 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f098061a58e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f098061ad51 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f097c65ff67 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f097c6601a0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f097c66022c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f098061b0ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f0980b1ac18 in QGuiApplication::sync() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#24 0x00007f092f0d29ed in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
#25 0x00007f09292c6348 in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#26 0x00007f09292f222b in  () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#27 0x00007f09292e9c0b in QtWebEngineCore::WebContentsAdapter::load(QWebEngineHttpRequest const&) () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#28 0x00007f09292ea24e in QtWebEngineCore::WebContentsAdapter::load(QUrl const&) () at /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#29 0x00007f092f310e0b in  () at /usr/lib/x86_64-linux-gnu/libkwebenginepartlib.so
#30 0x00007f092f307231 in WebEnginePart::openUrl(QUrl const&) () at /usr/lib/x86_64-linux-gnu/libkwebenginepartlib.so
#31 0x00007f092f30f1ac in WebEngineBrowserExtension::restoreState(QDataStream&) () at /usr/lib/x86_64-linux-gnu/libkwebenginepartlib.so
#32 0x00007f096fc1e359 in KonqView::restoreHistory() () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#33 0x00007f096fc1ebf6 in KonqView::loadHistoryConfig(KConfigGroup const&, QString const&) () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#34 0x00007f096fc2322b in KonqViewManager::loadItem(KConfigGroup const&, KonqFrameContainerBase*, QString const&, QUrl const&, bool, QUrl const&, QString const&, bool, int) () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#35 0x00007f096fc23871 in KonqViewManager::loadItem(KConfigGroup const&, KonqFrameContainerBase*, QString const&, QUrl const&, bool, QUrl const&, QString const&, bool, int) () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#36 0x00007f096fc24260 in KonqViewManager::loadRootItem(KConfigGroup const&, KonqFrameContainerBase*, QUrl const&, bool, QUrl const&, QString const&, bool, int) () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#37 0x00007f096fc257c3 in KonqViewManager::loadViewConfigFromGroup(KConfigGroup const&, QString const&, QUrl const&, KonqOpenURLRequest const&, bool) () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#38 0x00007f096fc5cfe0 in KonqMainWindow::readProperties(KConfigGroup const&) () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#39 0x00007f0976d230f8 in KMainWindow::readPropertiesInternal(KConfig*, int) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#40 0x00007f0976d23142 in KMainWindow::restore(int, bool) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#41 0x00007f096fc915af in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_konqueror.so
#42 0x000055f9754bb69d in  ()
#43 0x000055f9754bcc8b in  ()
#44 0x000055f9754bd51b in  ()
#45 0x000055f9754b800c in  ()
#46 0x00007f097ff9fa87 in __libc_start_main (main=0x55f9754b76c0, argc=5, argv=0x7ffdc2c93fa8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdc2c93f98) at ../csu/libc-start.c:310
#47 0x000055f9754b8c7a in _start ()

Reported using DrKonqi