Application: kmail (5.9.2)

Qt Version: 5.11.2
Frameworks Version: 5.51.0
Operating System: Linux 4.15.0-38-generic x86_64
Distribution: KDE neon User Edition 5.14

-- Information about the crash:
Rapidly scrolling through emails, kmail would crash. Usually one of the panels would turn white or black and hang. It crashes about 2 seconds after.

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 0x7f6a22c1cbc0 (LWP 18024))]

Thread 29 (Thread 0x7f6935b93700 (LWP 18098)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f6a062eafb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f6a062eaf68, cond=0x7f6a062eaf90) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f6a062eaf90, mutex=0x7f6a062eaf68) at pthread_cond_wait.c:655
#3  0x00007f6a05ff5954 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f6a05ff5999 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f6a155556db in start_thread (arg=0x7f6935b93700) at pthread_create.c:463
#6  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7f6937fff700 (LWP 18085)):
#0  0x00007f6a1fcd5bf9 in __GI___poll (fds=0x7f6930003ce0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f6a13689439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6a1368954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6a2061004b in QEventDispatcherGlib::processEvents (this=0x7f6930000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f6a205b430a in QEventLoop::exec (this=this@entry=0x7f6937ffe9e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f6a203dfbba in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#6  0x00007f6a203eaadb in QThreadPrivate::start (arg=0x5561b38045a0) at thread/qthread_unix.cpp:367
#7  0x00007f6a155556db in start_thread (arg=0x7f6937fff700) at pthread_create.c:463
#8  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f69627fc700 (LWP 18062)):
#0  0x00007f6a1fcd10b4 in __GI___libc_read (fd=63, buf=0x7f69627fb81e, nbytes=10) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f69f931bff1 in pa_read () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#2  0x00007f6a0299f9fe in pa_mainloop_prepare () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f6a029a0470 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f6a029a0530 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f6a029ae399 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f69f934b2a8 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f6a155556db in start_thread (arg=0x7f69627fc700) at pthread_create.c:463
#8  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f6962ffd700 (LWP 18061)):
#0  0x00007f6a1fcd1187 in __GI___libc_write (fd=2, buf=0x7f6962ff9c50, nbytes=39) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f6a1fc4c1bd in _IO_new_file_write (f=0x7f6a1ffad680 <_IO_2_1_stderr_>, data=0x7f6962ff9c50, n=39) at fileops.c:1203
#2  0x00007f6a1fc4cb2f in new_do_write (to_do=<optimized out>, data=0x7f6962ff9c50 "[warn] epoll_wait: Bad file descriptor\n", fp=0x7f6a1ffad680 <_IO_2_1_stderr_>) at fileops.c:457
#3  _IO_new_file_xsputn (f=0x7f6a1ffad680 <_IO_2_1_stderr_>, data=<optimized out>, n=39) at fileops.c:1277
#4  0x00007f6a1fc1f707 in buffered_vfprintf (s=s@entry=0x7f6a1ffad680 <_IO_2_1_stderr_>, format=format@entry=0x7f6a001c06a8 "[%s] %s\n", args=args@entry=0x7f6962ffc210) at vfprintf.c:2350
#5  0x00007f6a1fc1c726 in _IO_vfprintf_internal (s=s@entry=0x7f6a1ffad680 <_IO_2_1_stderr_>, format=0x7f6a001c06a8 "[%s] %s\n", ap=ap@entry=0x7f6962ffc210) at vfprintf.c:1301
#6  0x00007f6a1fcf34c6 in ___fprintf_chk (fp=0x7f6a1ffad680 <_IO_2_1_stderr_>, flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f6a001a89ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f6a001a8b44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f6a001aa46c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f6a001a0114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f6a0a6e6ed5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f6a0a70720b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f6a0a72960f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f6a155556db in start_thread (arg=0x7f6962ffd700) at pthread_create.c:463
#16 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f69637fe700 (LWP 18060)):
#0  0x00007f6a1555bed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f69637fd710, expected=0, futex_word=0x7f69637fd8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f69637fd7b0, mutex=0x7f69637fd8a8, cond=0x7f69637fd8d0) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f69637fd8d0, mutex=0x7f69637fd8a8, abstime=0x7f69637fd7b0) at pthread_cond_wait.c:667
#3  0x00007f6a0a713917 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715bf7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a6e00f8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a70720b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a72960f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f69637fe700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f6963fff700 (LWP 18059)):
#0  0x00007f6a1555bed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f6963ffe710, expected=0, futex_word=0x7f6963ffe8f8) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f6963ffe7b0, mutex=0x7f6963ffe8a8, cond=0x7f6963ffe8d0) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f6963ffe8d0, mutex=0x7f6963ffe8a8, abstime=0x7f6963ffe7b0) at pthread_cond_wait.c:667
#3  0x00007f6a0a713917 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715bf7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a6e00f8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a70720b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a72960f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f6963fff700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f6984ff9700 (LWP 18058)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5561b27a5c28) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5561b27a5b68, cond=0x5561b27a5c00) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5561b27a5c00, mutex=0x5561b27a5b68) at pthread_cond_wait.c:655
#3  0x00007f6a0a713849 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0b1cb078 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a72944c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a155556db in start_thread (arg=0x7f6984ff9700) at pthread_create.c:463
#8  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f69857fa700 (LWP 18057)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f69857f9938) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f69857f98e8, cond=0x7f69857f9910) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f69857f9910, mutex=0x7f69857f98e8) at pthread_cond_wait.c:655
#3  0x00007f6a0a713849 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715c0c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715c9f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad78 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c2e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f69857fa700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f6985ffb700 (LWP 18056)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f6a1fcf3474 in ___fprintf_chk (fp=0x7f6a1ffae8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f6a001c06a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f6a001a89ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f6a001a8b44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f6a001aa46c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f6a001a0114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f6a0a6e6e81 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a70720b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a097e023a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a097e085f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f6a0a7296c8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f6a155556db in start_thread (arg=0x7f6985ffb700) at pthread_create.c:463
#13 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f69867fc700 (LWP 18055)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f69867fb938) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f69867fb8e8, cond=0x7f69867fb910) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f69867fb910, mutex=0x7f69867fb8e8) at pthread_cond_wait.c:655
#3  0x00007f6a0a713849 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715c0c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715c9f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad78 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c0ff in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f69867fc700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f6986ffd700 (LWP 18054)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f6986ffc938) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f6986ffc8e8, cond=0x7f6986ffc910) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f6986ffc910, mutex=0x7f6986ffc8e8) at pthread_cond_wait.c:655
#3  0x00007f6a0a713849 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715c0c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715c9f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad78 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c2e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f6986ffd700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f69877fe700 (LWP 18053)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f69877fd938) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f69877fd8e8, cond=0x7f69877fd910) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f69877fd910, mutex=0x7f69877fd8e8) at pthread_cond_wait.c:655
#3  0x00007f6a0a713849 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715c0c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715c9f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad78 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c0ff in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f69877fe700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f6987fff700 (LWP 18052)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f6987ffe938) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f6987ffe8e8, cond=0x7f6987ffe910) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f6987ffe910, mutex=0x7f6987ffe8e8) at pthread_cond_wait.c:655
#3  0x00007f6a0a713849 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715c0c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715c9f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad78 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c0ff in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f6987fff700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f69a4ff9700 (LWP 18051)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f69a4ff8938) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f69a4ff88e8, cond=0x7f69a4ff8910) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f69a4ff8910, mutex=0x7f69a4ff88e8) at pthread_cond_wait.c:655
#3  0x00007f6a0a713849 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715c0c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715c9f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad78 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c0ff in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f69a4ff9700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f69a5ffb700 (LWP 18049)):
#0  0x00007f6a1555bed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f69a5ffa740, expected=0, futex_word=0x7f69a5ffa928) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f69a5ffa7e0, mutex=0x7f69a5ffa8d8, cond=0x7f69a5ffa900) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f69a5ffa900, mutex=0x7f69a5ffa8d8, abstime=0x7f69a5ffa7e0) at pthread_cond_wait.c:667
#3  0x00007f6a0a713917 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715bf7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715ce2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad61 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c2e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f69a5ffb700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f69a6ffd700 (LWP 18047)):
#0  0x00007f6a1555bed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f69a6ffc740, expected=0, futex_word=0x7f69a6ffc928) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f69a6ffc7e0, mutex=0x7f69a6ffc8d8, cond=0x7f69a6ffc900) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f69a6ffc900, mutex=0x7f69a6ffc8d8, abstime=0x7f69a6ffc7e0) at pthread_cond_wait.c:667
#3  0x00007f6a0a713917 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715bf7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715ce2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad61 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c2e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f69a6ffd700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f69a77fe700 (LWP 18046)):
#0  0x00007f6a1555bed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f69a77fd740, expected=0, futex_word=0x7f69a77fd928) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f69a77fd7e0, mutex=0x7f69a77fd8d8, cond=0x7f69a77fd900) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f69a77fd900, mutex=0x7f69a77fd8d8, abstime=0x7f69a77fd7e0) at pthread_cond_wait.c:667
#3  0x00007f6a0a713917 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715bf7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715ce2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad61 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c2e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f69a77fe700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f69a7fff700 (LWP 18045)):
#0  0x00007f6a1555bed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f69a7ffe740, expected=0, futex_word=0x7f69a7ffe928) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7f69a7ffe7e0, mutex=0x7f69a7ffe8d8, cond=0x7f69a7ffe900) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7f69a7ffe900, mutex=0x7f69a7ffe8d8, abstime=0x7f69a7ffe7e0) at pthread_cond_wait.c:667
#3  0x00007f6a0a713917 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715bf7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715ce2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a71ad61 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a71c2e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a155556db in start_thread (arg=0x7f69a7fff700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f69bc896700 (LWP 18044)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f6a1fcf3474 in ___fprintf_chk (fp=0x7f6a1ffae8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f6a001c06a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f6a001a89ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f6a001a8b44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f6a001aa46c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f6a001a0114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f6a0a6e6e81 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a70720b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a72960f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f6a155556db in start_thread (arg=0x7f69bc896700) at pthread_create.c:463
#11 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f69bd097700 (LWP 18043)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f69bd0968d8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7f69bd096888, cond=0x7f69bd0968b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7f69bd0968b0, mutex=0x7f69bd096888) at pthread_cond_wait.c:655
#3  0x00007f6a0a713849 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f6a0a715c0c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f6a0a715c9f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f6a0a6e00ea in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a70720b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a72960f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f6a155556db in start_thread (arg=0x7f69bd097700) at pthread_create.c:463
#11 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f69bd898700 (LWP 18042)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007f6a1fcf3474 in ___fprintf_chk (fp=0x7f6a1ffae8b0 <_IO_stdfile_2_lock>, flag=1, format=0x7f6a001c06a8 "[%s] %s\n") at fprintf_chk.c:30
#2  0x00007f6a001a89ad in event_logv_ () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f6a001a8b44 in event_warn () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f6a001aa46c in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f6a001a0114 in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f6a0a6e6ed5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f6a0a70720b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f6a0a72960f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f6a0a724ff1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f6a155556db in start_thread (arg=0x7f69bd898700) at pthread_create.c:463
#11 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f69bffff700 (LWP 18034)):
#0  0x00007f6a1fcd5bf9 in __GI___poll (fds=0x7f69b80049b0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f6a13689439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6a1368954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6a2061004b in QEventDispatcherGlib::processEvents (this=0x7f69b8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f6a205b430a in QEventLoop::exec (this=this@entry=0x7f69bfffe9e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f6a203dfbba in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#6  0x00007f6a203eaadb in QThreadPrivate::start (arg=0x5561b2732940) at thread/qthread_unix.cpp:367
#7  0x00007f6a155556db in start_thread (arg=0x7f69bffff700) at pthread_create.c:463
#8  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f69d5ba8700 (LWP 18031)):
#0  0x00007f6a136ced79 in g_mutex_lock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6a13688fc6 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6a136894c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6a1368954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6a2061004b in QEventDispatcherGlib::processEvents (this=0x7f69c0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f6a205b430a in QEventLoop::exec (this=this@entry=0x7f69d5ba79e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#6  0x00007f6a203dfbba in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#7  0x00007f6a203eaadb in QThreadPrivate::start (arg=0x5561b2568bb0) at thread/qthread_unix.cpp:367
#8  0x00007f6a155556db in start_thread (arg=0x7f69d5ba8700) at pthread_create.c:463
#9  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f69d63a9700 (LWP 18030)):
#0  0x00007f6a1fcd10b4 in __GI___libc_read (fd=14, buf=0x7f69d63a87d0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f6a136cda00 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6a13688f27 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6a136893e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6a1368954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6a2061004b in QEventDispatcherGlib::processEvents (this=0x7f69cc000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f6a205b430a in QEventLoop::exec (this=this@entry=0x7f69d63a89e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#7  0x00007f6a203dfbba in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#8  0x00007f6a203eaadb in QThreadPrivate::start (arg=0x5561b2515f30) at thread/qthread_unix.cpp:367
#9  0x00007f6a155556db in start_thread (arg=0x7f69d63a9700) at pthread_create.c:463
#10 0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f69d6dee700 (LWP 18029)):
#0  0x00007f6a1fcd5bf9 in __GI___poll (fds=0x7f69c8004a10, nfds=1, timeout=9605) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f6a13689439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6a1368954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6a2061004b in QEventDispatcherGlib::processEvents (this=0x7f69c8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f6a205b430a in QEventLoop::exec (this=this@entry=0x7f69d6ded9e0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f6a203dfbba in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#6  0x00007f6a203eaadb in QThreadPrivate::start (arg=0x5561b25676c0) at thread/qthread_unix.cpp:367
#7  0x00007f6a155556db in start_thread (arg=0x7f69d6dee700) at pthread_create.c:463
#8  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f69d7fff700 (LWP 18028)):
#0  0x00007f6a1fcd5bf9 in __GI___poll (fds=0x7f69d00291c0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f6a13689439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6a1368954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6a2061004b in QEventDispatcherGlib::processEvents (this=0x7f69d0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f6a205b430a in QEventLoop::exec (this=this@entry=0x7f69d7ffe9b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#5  0x00007f6a203dfbba in QThread::exec (this=<optimized out>) at thread/qthread.cpp:525
#6  0x00007f6a1ec0fe45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f6a203eaadb in QThreadPrivate::start (arg=0x7f6a1ee87d60) at thread/qthread_unix.cpp:367
#8  0x00007f6a155556db in start_thread (arg=0x7f69d7fff700) at pthread_create.c:463
#9  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f69dd77f700 (LWP 18027)):
#0  0x00007f6a1555b9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5561b238e458) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5561b238e408, cond=0x5561b238e430) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5561b238e430, mutex=0x5561b238e408) at pthread_cond_wait.c:655
#3  0x00007f69e2a2c46b in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007f69e2a2c197 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#5  0x00007f6a155556db in start_thread (arg=0x7f69dd77f700) at pthread_create.c:463
#6  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f69ea039700 (LWP 18026)):
#0  0x00007f6a1fcd5bf9 in __GI___poll (fds=0x7f69ea0388e8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f6a12ab3747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f6a12ab536a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f69ebd3ded9 in QXcbEventReader::run (this=0x5561b234dcb0) at qxcbconnection.cpp:1391
#4  0x00007f6a203eaadb in QThreadPrivate::start (arg=0x5561b234dcb0) at thread/qthread_unix.cpp:367
#5  0x00007f6a155556db in start_thread (arg=0x7f69ea039700) at pthread_create.c:463
#6  0x00007f6a1fce288f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f6a22c1cbc0 (LWP 18024)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f6a1fc01801 in __GI_abort () at abort.c:79
#8  0x00007f6a1fbf139a in __assert_fail_base (fmt=0x7f6a1fd787d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f69e22da743 "kref", file=file@entry=0x7f69e22da72a "../../nouveau/pushbuf.c", line=line@entry=727, function=function@entry=0x7f69e22da770 "nouveau_pushbuf_data") at assert.c:92
#9  0x00007f6a1fbf1412 in __GI___assert_fail (assertion=0x7f69e22da743 "kref", file=0x7f69e22da72a "../../nouveau/pushbuf.c", line=727, function=0x7f69e22da770 "nouveau_pushbuf_data") at assert.c:101
#10 0x00007f69e22d8b8d in nouveau_pushbuf_data () from /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#11 0x00007f69e22d8b46 in nouveau_pushbuf_data () from /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#12 0x00007f69e22d8c14 in ?? () from /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#13 0x00007f69e22d8ebf in ?? () from /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#14 0x00007f69e22d9a50 in nouveau_pushbuf_kick () from /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
#15 0x00007f69e2cfc176 in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#16 0x00007f69e296ce0b in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#17 0x00007f69e2ad017a in ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#18 0x00007f69e83330c8 in ?? () from /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#19 0x00007f69e9630e02 in QGLXContext::swapBuffers (this=0x5561b2b50820, surface=0x5561b25e6670) at qglxintegration.cpp:615
#20 0x00007f6a20b8467f in QOpenGLContext::swapBuffers (this=0x5561b2ba7250, surface=surface@entry=0x5561b25c1770) at kernel/qopenglcontext.cpp:1115
#21 0x00007f6a20e4cd34 in QPlatformBackingStore::composeAndFlush (this=this@entry=0x5561b25e6c70, window=window@entry=0x5561b25c1760, region=..., offset=..., textures=textures@entry=0x7f69cc688010, translucentBackground=<optimized out>) at painting/qplatformbackingstore.cpp:452
#22 0x00007f69ebd5eddb in QXcbBackingStore::composeAndFlush (this=0x5561b25e6c70, window=0x5561b25c1760, region=..., offset=..., textures=0x7f69cc688010, translucentBackground=<optimized out>) at qxcbbackingstore.cpp:864
#23 0x00007f6a2134f384 in QWidgetBackingStore::qt_flush (widget=0x5561b25addb0, region=..., backingStore=<optimized out>, tlw=<optimized out>, widgetTextures=<optimized out>, widgetBackingStore=<optimized out>) at kernel/qwidgetbackingstore.cpp:146
#24 0x00007f6a21350afe in QWidgetBackingStore::flush (this=this@entry=0x5561b25c9830, widget=widget@entry=0x0) at kernel/qwidgetbackingstore.cpp:1420
#25 0x00007f6a2135218b in QWidgetBackingStore::endPaint (beginPaintInfo=<synthetic pointer>, backingStore=<optimized out>, cleaned=..., this=0x5561b25c9830) at kernel/qwidgetbackingstore.cpp:355
#26 QWidgetBackingStore::doSync (this=this@entry=0x5561b25c9830) at kernel/qwidgetbackingstore.cpp:1378
#27 0x00007f6a213523b5 in QWidgetBackingStore::sync (this=0x5561b25c9830) at kernel/qwidgetbackingstore.cpp:1156
#28 0x00007f6a21369aff in QWidgetPrivate::syncBackingStore (this=0x5561b238d210) at kernel/qwidget.cpp:1953
#29 0x00007f6a21381c08 in QWidget::event (this=this@entry=0x5561b25bf470, event=event@entry=0x5561b56dbce0) at kernel/qwidget.cpp:9226
#30 0x00007f6a214897b0 in QMainWindow::event (this=this@entry=0x5561b25bf470, event=event@entry=0x5561b56dbce0) at widgets/qmainwindow.cpp:1348
#31 0x00007f6a1f6d2c77 in KMainWindow::event (this=this@entry=0x5561b25bf470, ev=ev@entry=0x5561b56dbce0) at ./src/kmainwindow.cpp:869
#32 0x00007f6a1f717b05 in KXmlGuiWindow::event (this=0x5561b25bf470, ev=0x5561b56dbce0) at ./src/kxmlguiwindow.cpp:119
#33 0x00007f6a21342e1c in QApplicationPrivate::notify_helper (this=this@entry=0x5561b22e7e80, receiver=receiver@entry=0x5561b25bf470, e=e@entry=0x5561b56dbce0) at kernel/qapplication.cpp:3727
#34 0x00007f6a2134a3ef in QApplication::notify (this=0x7ffe9e6a8c90, receiver=0x5561b25bf470, e=0x5561b56dbce0) at kernel/qapplication.cpp:3486
#35 0x00007f6a205b5fe8 in QCoreApplication::notifyInternal2 (receiver=0x5561b25bf470, event=event@entry=0x5561b56dbce0) at kernel/qcoreapplication.cpp:1048
#36 0x00007f6a205b8b2d in QCoreApplication::sendEvent (event=0x5561b56dbce0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#37 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x5561b22e6490) at kernel/qcoreapplication.cpp:1745
#38 0x00007f6a205b90e8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1599
#39 0x00007f6a206109f3 in postEventSourceDispatch (s=0x5561b237e8d0) at kernel/qeventdispatcher_glib.cpp:276
#40 0x00007f6a13689287 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007f6a136894c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007f6a1368954c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007f6a2061002f in QEventDispatcherGlib::processEvents (this=0x5561b237d5a0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#44 0x00007f69ebdc9761 in QPAEventDispatcherGlib::processEvents (this=0x5561b237d5a0, flags=...) at qeventdispatcher_glib.cpp:69
#45 0x00007f6a205b430a in QEventLoop::exec (this=this@entry=0x7ffe9e6a87d0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:214
#46 0x00007f6a205bd4d0 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1336
#47 0x00005561b1c8384d in main (argc=<optimized out>, argv=<optimized out>) at ./src/main.cpp:171

The reporter indicates this bug may be a duplicate of or related to bug 399884.

Possible duplicates by query: bug 399884, bug 388050.

Report to https://bugs.kde.org/