[kmail2] [Bug 414988] New: KMail crashes when being used over X2GO

Fred bugzilla_noreply at kde.org
Mon Dec 9 17:56:13 GMT 2019 

https://bugs.kde.org/show_bug.cgi?id=414988

            Bug ID: 414988
           Summary: KMail crashes when being used over X2GO
           Product: kmail2
           Version: 5.7.3
          Platform: Ubuntu Packages
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: fscheffe at gmail.com
  Target Milestone: ---

Application: kmail (5.7.3)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-72-generic x86_64
Distribution: Ubuntu 18.04.3 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Starting KMail when in a X2GO remote session in Kubuntu 18.04.3.

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 0x7f3e3a15cb80 (LWP 22516))]

Thread 29 (Thread 0x7f3d77fff700 (LWP 22561)):
#0  0x00007f3e37237187 in __GI___libc_write (fd=2, buf=0x7f3d77ffbac0,
nbytes=48) at ../sysdeps/unix/sysv/linux/write.c:27
#1  0x00007f3e371b21bd in _IO_new_file_write (f=0x7f3e37513680
<_IO_2_1_stderr_>, data=0x7f3d77ffbac0, n=48) at fileops.c:1203
#2  0x00007f3e371b2b2f in new_do_write (to_do=<optimized out>,
data=0x7f3d77ffbac0 "[warn] epoll_wait: Ongeldige bestandsdescriptor\n",
fp=0x7f3e37513680 <_IO_2_1_stderr_>) at fileops.c:457
#3  0x00007f3e371b2b2f in _IO_new_file_xsputn (f=0x7f3e37513680
<_IO_2_1_stderr_>, data=<optimized out>, n=48) at fileops.c:1277
#4  0x00007f3e37185707 in buffered_vfprintf (s=s at entry=0x7f3e37513680
<_IO_2_1_stderr_>, format=format at entry=0x7f3e189e26a8 "[%s] %s\n",
args=args at entry=0x7f3d77ffe080) at vfprintf.c:2350
#5  0x00007f3e37182726 in _IO_vfprintf_internal (s=s at entry=0x7f3e37513680
<_IO_2_1_stderr_>, format=0x7f3e189e26a8 "[%s] %s\n",
ap=ap at entry=0x7f3d77ffe080) at vfprintf.c:1301
#6  0x00007f3e372594c6 in ___fprintf_chk (fp=0x7f3e37513680 <_IO_2_1_stderr_>,
flag=1, format=<optimized out>) at fprintf_chk.c:35
#7  0x00007f3e189ca9ad in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f3e189cab44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f3e189cc46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#10 0x00007f3e189c2114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#11 0x00007f3e219afab9 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f3e219e04d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f3e2cb386db in start_thread (arg=0x7f3d77fff700) at
pthread_create.c:463
#17 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7f3d8cff9700 (LWP 22560)):
[KCrash Handler]
#6  0x00007f3e37165e97 in __GI_raise (sig=sig at entry=6) at
../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f3e37167801 in __GI_abort () at abort.c:79
#8  0x00007f3e371b0897 in __libc_message (action=action at entry=do_abort,
fmt=fmt at entry=0x7f3e372dd988 "*** %s ***: %s terminated\n") at
../sysdeps/posix/libc_fatal.c:181
#9  0x00007f3e3725bcd1 in __GI___fortify_fail_abort
(need_backtrace=need_backtrace at entry=false, msg=msg at entry=0x7f3e372dd966 "stack
smashing detected") at fortify_fail.c:33
#10 0x00007f3e3725bc92 in __stack_chk_fail () at stack_chk_fail.c:29
#11 0x00007f3e210117bd in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f3e24bf226e in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f3e24bf4850 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f3e24bf5999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f3e24bf0522 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f3e24bf0779 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007f3e24bf0fa8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007f3e24bf1695 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#19 0x00007f3e24bf1753 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x00007f3e21a08a83 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#21 0x00007f3e219aca00 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#22 0x00007f3e219ae058 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#23 0x00007f3e219ae3eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#24 0x00007f3e219af491 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#25 0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#26 0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#27 0x00007f3e219e04d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#28 0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#29 0x00007f3e2cb386db in start_thread (arg=0x7f3d8cff9700) at
pthread_create.c:463
#30 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f3d8d7fa700 (LWP 22559)):
#0  0x00007f3e3723bbf9 in __GI___poll (fds=0x7f3d60000b20, nfds=2, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3e1a962481 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f3e1a953e40 in pa_mainloop_poll () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f3e1a9544d0 in pa_mainloop_iterate () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f3e1a954560 in pa_mainloop_run () at
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f3e1a9623c9 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f3e11f92318 in  () at
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f3e2cb386db in start_thread (arg=0x7f3d8d7fa700) at
pthread_create.c:463
#8  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f3d8dffb700 (LWP 22558)):
#0  0x00007f3e2cb3eed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f3d8dffa5d0, expected=0, futex_word=0x7f3d8dffa758) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f3e2cb3eed9 in __pthread_cond_wait_common (abstime=0x7f3d8dffa670,
mutex=0x7f3d8dffa708, cond=0x7f3d8dffa730) at pthread_cond_wait.c:533
#2  0x00007f3e2cb3eed9 in __pthread_cond_timedwait (cond=0x7f3d8dffa730,
mutex=0x7f3d8dffa708, abstime=0x7f3d8dffa670) at pthread_cond_wait.c:667
#3  0x00007f3e21a0d652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219d491e in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219af52b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f3e219e04d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e2cb386db in start_thread (arg=0x7f3d8dffb700) at
pthread_create.c:463
#11 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f3d8e7fc700 (LWP 22557)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55b9b06fbab8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55b9b06fb9f8, cond=0x55b9b06fba90) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x55b9b06fba90,
mutex=0x55b9b06fb9f8) at pthread_cond_wait.c:655
#3  0x00007f3e22166060 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219dff11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e2cb386db in start_thread (arg=0x7f3d8e7fc700) at
pthread_create.c:463
#7  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f3d8effd700 (LWP 22556)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55b9b0712c48) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55b9b0712bf8, cond=0x55b9b0712c20) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x55b9b0712c20,
mutex=0x55b9b0712bf8) at pthread_cond_wait.c:655
#3  0x00007f3e219dec95 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219df177 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219dff11 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e2cb386db in start_thread (arg=0x7f3d8effd700) at
pthread_create.c:463
#8  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f3d8f7fe700 (LWP 22555)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f3d8f7fd738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f3d8f7fd6e8, cond=0x7f3d8f7fd710) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x7f3d8f7fd710,
mutex=0x7f3d8f7fd6e8) at pthread_cond_wait.c:655
#3  0x00007f3e219d4999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219d49c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219af4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f3e219e04d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e2cb386db in start_thread (arg=0x7f3d8f7fe700) at
pthread_create.c:463
#11 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f3d8ffff700 (LWP 22554)):
#0  0x00007f3e371b5aa0 in _IO_old_init (fp=fp at entry=0x7f3d8fffdb10,
flags=flags at entry=32768) at genops.c:561
#1  0x00007f3e371b5b6b in _IO_no_init (fp=fp at entry=0x7f3d8fffdb10,
flags=flags at entry=32768, orientation=orientation at entry=-1, wd=wd at entry=0x0,
jmp=jmp at entry=0x0) at genops.c:591
#2  0x00007f3e3725912c in ___vsnprintf_chk (s=0x7f3d8fffdd9a "",
maxlen=<optimized out>, flags=1, slen=<optimized out>, format=0x7f3e189e5aed ":
%s", args=0x7f3d8fffdcb0) at vsnprintf_chk.c:53
#3  0x00007f3e189c73b3 in evutil_vsnprintf () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f3e189c744f in evutil_snprintf () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f3e189ca95c in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f3e189cab44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#7  0x00007f3e189cc46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f3e189c2114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#9  0x00007f3e219afab9 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f3e21266978 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f3e21266f2b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007f3e219e0588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007f3e2cb386db in start_thread (arg=0x7f3d8ffff700) at
pthread_create.c:463
#17 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f3dacff9700 (LWP 22553)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f3dacff8358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f3dacff8308, cond=0x7f3dacff8330) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x7f3dacff8330,
mutex=0x7f3dacff8308) at pthread_cond_wait.c:655
#3  0x00007f3e219d4999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219d49c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219af4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f3e212668c8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f3e21266f1b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e219e0588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f3e2cb386db in start_thread (arg=0x7f3dacff9700) at
pthread_create.c:463
#13 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f3dad7fa700 (LWP 22552)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f3dad7f9358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f3dad7f9308, cond=0x7f3dad7f9330) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x7f3dad7f9330,
mutex=0x7f3dad7f9308) at pthread_cond_wait.c:655
#3  0x00007f3e219d4999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219d49c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219af4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f3e21266818 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f3e21266f0b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e219e0588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f3e2cb386db in start_thread (arg=0x7f3dad7fa700) at
pthread_create.c:463
#13 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f3dadffb700 (LWP 22551)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f3dadffa358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f3dadffa308, cond=0x7f3dadffa330) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x7f3dadffa330,
mutex=0x7f3dadffa308) at pthread_cond_wait.c:655
#3  0x00007f3e219d4999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219d49c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219af4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f3e21266768 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f3e21266efb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e219e0588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f3e2cb386db in start_thread (arg=0x7f3dadffb700) at
pthread_create.c:463
#13 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f3dae7fc700 (LWP 22550)):
#0  0x00007f3e37248bb7 in epoll_wait (epfd=42, events=0x7f3d980020d0,
maxevents=32, timeout=0) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007f3e189cc2c5 in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007f3e189c2114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f3e219afab9 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e212666b8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e21266eeb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f3e219e0588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e2cb386db in start_thread (arg=0x7f3dae7fc700) at
pthread_create.c:463
#11 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f3daeffd700 (LWP 22549)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f3daeffc358) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f3daeffc308, cond=0x7f3daeffc330) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x7f3daeffc330,
mutex=0x7f3daeffc308) at pthread_cond_wait.c:655
#3  0x00007f3e219d4999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219d49c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219af4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f3e21266608 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f3e21266edb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e219e0588 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f3e2cb386db in start_thread (arg=0x7f3daeffd700) at
pthread_create.c:463
#13 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f3daf7fe700 (LWP 22548)):
#0  0x00007f3e2cb3eed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f3daf7fd7e0, expected=0, futex_word=0x7f3db00046f0) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f3e2cb3eed9 in __pthread_cond_wait_common (abstime=0x7f3daf7fd880,
mutex=0x7f3db00046a0, cond=0x7f3db00046c8) at pthread_cond_wait.c:533
#2  0x00007f3e2cb3eed9 in __pthread_cond_timedwait (cond=0x7f3db00046c8,
mutex=0x7f3db00046a0, abstime=0x7f3daf7fd880) at pthread_cond_wait.c:667
#3  0x00007f3e21a0d652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219e3799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219e3cfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e2cb386db in start_thread (arg=0x7f3daf7fe700) at
pthread_create.c:463
#8  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f3daffff700 (LWP 22547)):
#0  0x00007f3e2cb3eed9 in futex_reltimed_wait_cancelable (private=<optimized
out>, reltime=0x7f3dafffe7e0, expected=0, futex_word=0x7f3db00046f4) at
../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f3e2cb3eed9 in __pthread_cond_wait_common (abstime=0x7f3dafffe880,
mutex=0x7f3db00046a0, cond=0x7f3db00046c8) at pthread_cond_wait.c:533
#2  0x00007f3e2cb3eed9 in __pthread_cond_timedwait (cond=0x7f3db00046c8,
mutex=0x7f3db00046a0, abstime=0x7f3dafffe880) at pthread_cond_wait.c:667
#3  0x00007f3e21a0d652 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219e3799 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219e3cfb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e2cb386db in start_thread (arg=0x7f3daffff700) at
pthread_create.c:463
#8  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f3dc4acc700 (LWP 22546)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7f3dc4acb738) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x7f3dc4acb6e8, cond=0x7f3dc4acb710) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x7f3dc4acb710,
mutex=0x7f3dc4acb6e8) at pthread_cond_wait.c:655
#3  0x00007f3e219d4999 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007f3e219d49c7 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007f3e219af4db in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007f3e219e04d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e2cb386db in start_thread (arg=0x7f3dc4acc700) at
pthread_create.c:463
#11 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f3dc52cd700 (LWP 22545)):
#0  0x00007f3e371829d3 in _IO_vfprintf_internal (s=s at entry=0x7f3dc52cbef0,
format=format at entry=0x7f3e189e5aed ": %s", ap=ap at entry=0x7f3dc52cc090) at
vfprintf.c:1676
#1  0x00007f3e37259169 in ___vsnprintf_chk (s=0x7f3dc52cc17a ": Ongeldige
bestandsdescriptor", maxlen=<optimized out>, flags=1, slen=<optimized out>,
format=0x7f3e189e5aed ": %s", args=0x7f3dc52cc090) at vsnprintf_chk.c:63
#2  0x00007f3e189c73b3 in evutil_vsnprintf () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007f3e189c744f in evutil_snprintf () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4  0x00007f3e189ca95c in event_logv_ () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#5  0x00007f3e189cab44 in event_warn () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#6  0x00007f3e189cc46c in  () at /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#7  0x00007f3e189c2114 in event_base_loop () at
/usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#8  0x00007f3e219afb0d in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007f3e219abda8 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007f3e219c877b in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007f3e219e04d6 in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007f3e219dc5eb in  () at
/usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007f3e2cb386db in start_thread (arg=0x7f3dc52cd700) at
pthread_create.c:463
#14 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f3dc7253700 (LWP 22538)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55b9b0755140) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55b9b07550f0, cond=0x55b9b0755118) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x55b9b0755118,
mutex=0x55b9b07550f0) at pthread_cond_wait.c:655
#3  0x00007f3e3794e5ab in QWaitCondition::wait(QMutex*, unsigned long) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f3e37946c1b in QSemaphore::acquire(int) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f3dd039380c in  () at
/usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#6  0x00007f3e3794d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f3e2cb386db in start_thread (arg=0x7f3dc7253700) at
pthread_create.c:463
#8  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f3dd0e0e700 (LWP 22535)):
#0  0x00007f3e2aee1b6d in g_main_context_prepare () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3e2aee24fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3e2aee26dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3e37b8499b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f3e37b299fa in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f3e3794823a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f3e3794d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f3e2cb386db in start_thread (arg=0x7f3dd0e0e700) at
pthread_create.c:463
#8  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f3ded5eb700 (LWP 22525)):
#0  0x00007f3e372370b4 in __GI___libc_read (fd=13, buf=0x7f3ded5ea810,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f3e2af272d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3e2aee20b7 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3e2aee2570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3e2aee26dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3e37b8499b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f3e37b299fa in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f3e3794823a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f3e3794d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f3e2cb386db in start_thread (arg=0x7f3ded5eb700) at
pthread_create.c:463
#10 0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f3deddec700 (LWP 22524)):
#0  0x00007f3e2aee1df0 in g_main_context_check () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3e2aee2570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3e2aee26dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3e37b8499b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f3e37b299fa in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f3e3794823a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f3e3794d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f3e2cb386db in start_thread (arg=0x7f3deddec700) at
pthread_create.c:463
#8  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f3dee5ed700 (LWP 22523)):
#0  0x00007f3e2cb4006a in __GI___pthread_getspecific (key=<optimized out>) at
pthread_getspecific.c:65
#1  0x00007f3e2af0a680 in g_thread_self () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3e2aee26cd in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3e37b8499b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f3e37b299fa in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f3e3794823a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f3e3794d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f3e2cb386db in start_thread (arg=0x7f3dee5ed700) at
pthread_create.c:463
#8  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f3def7fe700 (LWP 22522)):
#0  0x00007f3e3723bbf9 in __GI___poll (fds=0x7f3de00278e0, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3e2aee25c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3e2aee26dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3e37b8499b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f3e37b299fa in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f3e3794823a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f3e36181d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f3e3794d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f3e2cb386db in start_thread (arg=0x7f3def7fe700) at
pthread_create.c:463
#9  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f3deffff700 (LWP 22521)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55b9b02cf5a8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55b9b02cf558, cond=0x55b9b02cf580) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x55b9b02cf580,
mutex=0x55b9b02cf558) at pthread_cond_wait.c:655
#3  0x00007f3dfab269fb in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f3dfab26877 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f3e2cb386db in start_thread (arg=0x7f3deffff700) at
pthread_create.c:463
#6  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f3df4ef7700 (LWP 22520)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55b9b02cf448) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55b9b02cf3f8, cond=0x55b9b02cf420) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x55b9b02cf420,
mutex=0x55b9b02cf3f8) at pthread_cond_wait.c:655
#3  0x00007f3dfab269fb in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f3dfab26877 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f3e2cb386db in start_thread (arg=0x7f3df4ef7700) at
pthread_create.c:463
#6  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f3df56f8700 (LWP 22519)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55b9b02cf2e8) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55b9b02cf298, cond=0x55b9b02cf2c0) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x55b9b02cf2c0,
mutex=0x55b9b02cf298) at pthread_cond_wait.c:655
#3  0x00007f3dfab269fb in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f3dfab26877 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f3e2cb386db in start_thread (arg=0x7f3df56f8700) at
pthread_create.c:463
#6  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f3df5ef9700 (LWP 22518)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55b9b02cf188) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55b9b02cf138, cond=0x55b9b02cf160) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x55b9b02cf160,
mutex=0x55b9b02cf138) at pthread_cond_wait.c:655
#3  0x00007f3dfab269fb in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#4  0x00007f3dfab26877 in  () at /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#5  0x00007f3e2cb386db in start_thread (arg=0x7f3df5ef9700) at
pthread_create.c:463
#6  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f3e0242e700 (LWP 22517)):
#0  0x00007f3e3723bbf9 in __GI___poll (fds=0x7f3e0242d928, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3e2a310747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f3e2a31236a in xcb_wait_for_event () at
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f3e041295e9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f3e3794d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f3e2cb386db in start_thread (arg=0x7f3e0242e700) at
pthread_create.c:463
#6  0x00007f3e3724888f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f3e3a15cb80 (LWP 22516)):
#0  0x00007f3e2cb3e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x7fff5cae2798) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f3e2cb3e9f3 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55b9b0249f88, cond=0x7fff5cae2770) at pthread_cond_wait.c:502
#2  0x00007f3e2cb3e9f3 in __pthread_cond_wait (cond=0x7fff5cae2770,
mutex=0x55b9b0249f88) at pthread_cond_wait.c:655
#3  0x00007f3e2a310952 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f3e2a31206f in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#5  0x00007f3e2a312180 in xcb_wait_for_reply () at
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#6  0x00007f3e0414db85 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#7  0x00007f3e0414dccc in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#8  0x00007f3e380fb4f5 in QCursor::pos(QScreen const*) () at
/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#9  0x00007f3e38b5f8d9 in QTreeView::drawTree(QPainter*, QRegion const&) const
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f3e38b64615 in QTreeView::paintEvent(QPaintEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f3e388e8048 in QWidget::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f3e389894de in QFrame::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f3e38afcb8b in QAbstractItemView::viewportEvent(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f3e38b6552c in QTreeView::viewportEvent(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f3e37b2b6ac in
QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f3e388a9815 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f3e388b1104 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f3e37b2b9c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f3e388e119a in QWidgetPrivate::sendPaintEvent(QRegion const&) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f3e388e175a in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion
const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f3e388b8dfe in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007f3e388b90a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f3e388d067f in QWidgetPrivate::syncBackingStore() () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f3e388e81b8 in QWidget::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007f3e389fbc6b in QMainWindow::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007f3e36c3bb87 in KMainWindow::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#27 0x00007f3e36c809e5 in KXmlGuiWindow::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#28 0x00007f3e388a983c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007f3e388b1104 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f3e37b2b9c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f3e37b2e13d in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f3e37b85353 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007f3e2aee2417 in g_main_context_dispatch () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f3e2aee2650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f3e2aee26dc in g_main_context_iteration () at
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f3e37b8497f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007f3e37b299fa in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f3e37b32aa4 in QCoreApplication::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x000055b9aed5c7cd in  ()
#40 0x00007f3e37148b97 in __libc_start_main (main=0x55b9aed5b840, argc=3,
argv=0x7fff5cae4248, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fff5cae4238) at ../csu/libc-start.c:310
#41 0x000055b9aed5c8fa in _start ()

Reported using DrKonqi

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