Bug 399827

Summary: Random crash when switching to feed entry [GDB backtrace]
Product: [Applications] akregator Reporter: wolthera <griffinvalley>
Component: generalAssignee: kdepim bugs <kdepim-bugs>
Status: RESOLVED UPSTREAM    
Severity: crash    
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description wolthera 2018-10-15 10:07:18 UTC 
SUMMARY
I'd been having a random crash with akregator when going through my feeds, most of the time it crashed on the Gaming on Linux(https://www.gamingonlinux.com/) full article feed, but this time it was crashing on a gitlab commit feed. I'd been running akregator in gdb so I could get a backtrace because konqi isn't popping up for some reason.

STEPS TO REPRODUCE
1. Using + to go through entries.
2. Sometimes get a crash.


SOFTWARE VERSIONS
(available in About System)
(KDE Neon based on 18.04)
KDE Plasma Version: 5.14.0
KDE Frameworks Version: 5.50.0
Qt Version: 5.11.1

ADDITIONAL INFORMATION

I got a gdb backtrace:
-------------------------------------------------------------------------
Thread 20 "Chrome_IOThread" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff7effd700 (LWP 23142)]
0x0000555555f115b0 in ?? ()
(gdb) thread apply all backtrace

Thread 103 (Thread 0x7fffa2ffd700 (LWP 11269)):
#0  0x00007fffee288ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, 
    reltime=0x7fffa2ffca80, expected=0, futex_word=0x7fffa2ffcc68)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fffa2ffcb20, mutex=0x7fffa2ffcc18, 
    cond=0x7fffa2ffcc40) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fffa2ffcc40, mutex=0x7fffa2ffcc18, 
    abstime=0x7fffa2ffcb20) at pthread_cond_wait.c:667
#3  0x00007fffe4730837 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b17 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732c02 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c81 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe4739209 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fffa2ffd700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 30 (Thread 0x7fff3e845700 (LWP 23167)):
#0  0x00007ffff3d93bb7 in epoll_wait (epfd=335, events=0x7ffeac002010, maxevents=32, 
    timeout=30000) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fffd8d912c5 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fffd8d87114 in event_base_loop ()
   from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fffe4703db4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe472412b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe474652f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee2826db in start_thread (arg=0x7fff3e845700) at pthread_create.c:463
#8  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 28 (Thread 0x7fff7510f700 (LWP 23154)):
#0  0x00007fffee2889f3 in futex_wait_cancelable (private=<optimized out>, expected=0, 
    futex_word=0x7fffdff4ffb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fffdff4ff68, cond=0x7fffdff4ff90)
    at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fffdff4ff90, mutex=0x7fffdff4ff68)
    at pthread_cond_wait.c:655
#3  0x00007fffdfc5a954 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007fffdfc5a999 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007fffee2826db in start_thread (arg=0x7fff7510f700) at pthread_create.c:463
#6  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7fff76ffd700 (LWP 23149)):
#0  0x00007ffff3d86bf9 in __GI___poll (fds=0x7fff38004a10, nfds=1, timeout=9990)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebf61439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffebf6154c in g_main_context_iteration ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff46c1a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff4665dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff4490b8a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff449baab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fffee2826db in start_thread (arg=0x7fff76ffd700) at pthread_create.c:463
#8  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7fff75f38700 (LWP 23148)):
#0  0x00007ffff3d86bf9 in __GI___poll (fds=0x7fff4c007030, nfds=3, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffc1c65451 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fffc1c56e10 in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fffc1c574a0 in pa_mainloop_iterate ()
   from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fffc1c57530 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fffc1c65399 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fffc18022a8 in ?? ()
   from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007fffee2826db in start_thread (arg=0x7fff75f38700) at pthread_create.c:463
#8  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7fff777fe700 (LWP 23147)):
#0  0x00007ffff3d93bb7 in epoll_wait (epfd=302, events=0x7fff50002010, maxevents=32, 
    timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fffd8d912c5 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fffd8d87114 in event_base_loop ()
   from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fffe4703cc5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe472412b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe474652f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee2826db in start_thread (arg=0x7fff777fe700) at pthread_create.c:463
#8  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7fff7cff9700 (LWP 23146)):
#0  0x00007fffee288ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, 
    reltime=0x7fff7cff8a50, expected=0, futex_word=0x7fff7cff8c38)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff7cff8af0, mutex=0x7fff7cff8be8, 
    cond=0x7fff7cff8c10) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fff7cff8c10, mutex=0x7fff7cff8be8, 
    abstime=0x7fff7cff8af0) at pthread_cond_wait.c:667
#3  0x00007fffe4730837 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b17 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46fcee8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
---Type <return> to continue, or q <return> to quit---
#6  0x00007fffe472412b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe474652f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fff7cff9700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7fff7d7fa700 (LWP 23145)):
#0  0x00007fffee288ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, 
    reltime=0x7fff7d7f9a50, expected=0, futex_word=0x7fff7d7f9c38)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fff7d7f9af0, mutex=0x7fff7d7f9be8, 
    cond=0x7fff7d7f9c10) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fff7d7f9c10, mutex=0x7fff7d7f9be8, 
    abstime=0x7fff7d7f9af0) at pthread_cond_wait.c:667
#3  0x00007fffe4730837 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b17 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe46fcee8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe472412b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe474652f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fff7d7fa700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7fff7dffb700 (LWP 23144)):
#0  0x00007fffee2889f3 in futex_wait_cancelable (private=<optimized out>, expected=0, 
    futex_word=0x555555c05bd8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x555555c05b18, cond=0x555555c05bb0)
    at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x555555c05bb0, mutex=0x555555c05b18)
    at pthread_cond_wait.c:655
#3  0x00007fffe4730769 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe5440c28 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe474636c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee2826db in start_thread (arg=0x7fff7dffb700) at pthread_create.c:463
#8  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7fff7e7fc700 (LWP 23143)):
#0  0x00007fffee2889f3 in futex_wait_cancelable (private=<optimized out>, expected=0, 
    futex_word=0x7fff7e7fbc78) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fff7e7fbc28, cond=0x7fff7e7fbc50)
    at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fff7e7fbc50, mutex=0x7fff7e7fbc28)
    at pthread_cond_wait.c:655
#3  0x00007fffe4730769 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b2c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732bbf in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
---Type <return> to continue, or q <return> to quit---
#7  0x00007fffe4739209 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fff7e7fc700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fff7effd700 (LWP 23142)):
#0  0x0000555555f115b0 in ?? ()
#1  0x00007fffe30bf86f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fffe4d15d7c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fffe4e7034b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe3a23929 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe3a245ed in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe3a247d2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe3a1de9e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe3a1f8df in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe3a0cfc5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffe3a0c8c0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#11 0x00007fffe46de4ef in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#12 0x00007fffe4700d42 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#13 0x00007fffe4701685 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#14 0x00007fffe47017f7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#15 0x00007fffe4703c5a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#16 0x00007fffe472412b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#17 0x00007fffe37fe86a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#18 0x00007fffe37fee8f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#19 0x00007fffe47465e8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#20 0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#21 0x00007fffee2826db in start_thread (arg=0x7fff7effd700) at pthread_create.c:463
#22 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fff7f7fe700 (LWP 23141)):
#0  0x00007fffee2889f3 in futex_wait_cancelable (private=<optimized out>, expected=0, 
    futex_word=0x7fff7f7fdc78) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fff7f7fdc28, cond=0x7fff7f7fdc50)
    at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fff7f7fdc50, mutex=0x7fff7f7fdc28)
    at pthread_cond_wait.c:655
#3  0x00007fffe4730769 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b2c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732bbf in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe473901f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fff7f7fe700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fff77fff700 (LWP 23140)):
#0  0x00007fffee2889f3 in futex_wait_cancelable (private=<optimized out>, expected=0, 
---Type <return> to continue, or q <return> to quit---
    futex_word=0x7fff77ffec78) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fff77ffec28, cond=0x7fff77ffec50)
    at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fff77ffec50, mutex=0x7fff77ffec28)
    at pthread_cond_wait.c:655
#3  0x00007fffe4730769 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b2c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732bbf in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe4739209 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fff77fff700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fff7ffff700 (LWP 23139)):
#0  0x00007fffee2889f3 in futex_wait_cancelable (private=<optimized out>, expected=0, 
    futex_word=0x7fff7fffec78) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fff7fffec28, cond=0x7fff7fffec50)
    at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fff7fffec50, mutex=0x7fff7fffec28)
    at pthread_cond_wait.c:655
#3  0x00007fffe4730769 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b2c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732bbf in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe473901f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fff7ffff700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fffa0ff9700 (LWP 23138)):
#0  0x00007fffee2889f3 in futex_wait_cancelable (private=<optimized out>, expected=0, 
    futex_word=0x7fffa0ff8c78) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fffa0ff8c28, cond=0x7fffa0ff8c50)
    at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fffa0ff8c50, mutex=0x7fffa0ff8c28)
    at pthread_cond_wait.c:655
#3  0x00007fffe4730769 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b2c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732bbf in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe473901f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fffa0ff9700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fffa17fa700 (LWP 23137)):
#0  0x00007fffee2889f3 in futex_wait_cancelable (private=<optimized out>, expected=0, 
---Type <return> to continue, or q <return> to quit---
    futex_word=0x7fffa17f9c78) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x7fffa17f9c28, cond=0x7fffa17f9c50)
    at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x7fffa17f9c50, mutex=0x7fffa17f9c28)
    at pthread_cond_wait.c:655
#3  0x00007fffe4730769 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b2c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732bbf in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe473901f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fffa17fa700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fffa37fe700 (LWP 23133)):
#0  0x00007fffee288ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, 
    reltime=0x7fffa37fda80, expected=0, futex_word=0x7fffa37fdc68)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fffa37fdb20, mutex=0x7fffa37fdc18, 
    cond=0x7fffa37fdc40) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fffa37fdc40, mutex=0x7fffa37fdc18, 
    abstime=0x7fffa37fdb20) at pthread_cond_wait.c:667
#3  0x00007fffe4730837 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b17 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732c02 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c81 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe4739209 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fffa37fe700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fffa3fff700 (LWP 23132)):
#0  0x00007fffee288ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, 
    reltime=0x7fffa3ffea80, expected=0, futex_word=0x7fffa3ffec68)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fffa3ffeb20, mutex=0x7fffa3ffec18, 
    cond=0x7fffa3ffec40) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fffa3ffec40, mutex=0x7fffa3ffec18, 
    abstime=0x7fffa3ffeb20) at pthread_cond_wait.c:667
#3  0x00007fffe4730837 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b17 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732c02 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c81 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe4739209 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fffa3fff700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

---Type <return> to continue, or q <return> to quit---
Thread 9 (Thread 0x7fffb8fb7700 (LWP 23131)):
#0  0x00007fffee288ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, 
    reltime=0x7fffb8fb6a80, expected=0, futex_word=0x7fffb8fb6c68)
    at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  __pthread_cond_wait_common (abstime=0x7fffb8fb6b20, mutex=0x7fffb8fb6c18, 
    cond=0x7fffb8fb6c40) at pthread_cond_wait.c:533
#2  __pthread_cond_timedwait (cond=0x7fffb8fb6c40, mutex=0x7fffb8fb6c18, 
    abstime=0x7fffb8fb6b20) at pthread_cond_wait.c:667
#3  0x00007fffe4730837 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4732b17 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe4732c02 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4737c81 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe4739209 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffee2826db in start_thread (arg=0x7fffb8fb7700) at pthread_create.c:463
#10 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fffb97b8700 (LWP 23130)):
#0  0x00007ffff3d93bb7 in epoll_wait (epfd=287, events=0x7fffa8002000, maxevents=32, 
    timeout=2100000) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007fffd8d912c5 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fffd8d87114 in event_base_loop ()
   from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fffe4703db4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe472412b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe474652f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee2826db in start_thread (arg=0x7fffb97b8700) at pthread_create.c:463
#8  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fffb9fb9700 (LWP 23129)):
#0  0x00007ffff3d8903f in __GI___select (nfds=286, readfds=0x7fffb9fb86c0, writefds=0x0, 
    exceptfds=0x0, timeout=0x0) at ../sysdeps/unix/sysv/linux/select.c:41
#1  0x00007fffe46e1e8f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fffe46de4ef in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fffe4700d42 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe4701685 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe47017f7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe46fce91 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffe472412b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#8  0x00007fffe474652f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#9  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#10 0x00007fffee2826db in start_thread (arg=0x7fffb9fb9700) at pthread_create.c:463
#11 0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fffba7ba700 (LWP 23128)):
#0  0x00007ffff3d93bb7 in epoll_wait (epfd=279, events=0x7fffb0002010, maxevents=32, 
    timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
---Type <return> to continue, or q <return> to quit---
#1  0x00007fffd8d912c5 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2  0x00007fffd8d87114 in event_base_loop ()
   from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3  0x00007fffe4703cc5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffe472412b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#5  0x00007fffe474652f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#6  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#7  0x00007fffee2826db in start_thread (arg=0x7fffba7ba700) at pthread_create.c:463
#8  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fffbafbb700 (LWP 23127)):
#0  0x00007ffff3d566c2 in __GI___waitpid (pid=23124, stat_loc=0x0, options=0)
    at ../sysdeps/unix/sysv/linux/waitpid.c:30
#1  0x00007fffe471bb56 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fffee2826db in start_thread (arg=0x7fffbafbb700) at pthread_create.c:463
#4  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fffbb7bc700 (LWP 23122)):
#0  0x00007ffff3d86bf9 in __GI___poll (fds=0x7fffbb7bbb10, nfds=2, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffe3b44412 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#2  0x00007fffe474636c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#3  0x00007fffe4741f11 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5
#4  0x00007fffee2826db in start_thread (arg=0x7fffbb7bc700) at pthread_create.c:463
#5  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fffc37e0700 (LWP 23117)):
#0  0x00007ffff3d86bf9 in __GI___poll (fds=0x7fffbc01ae50, nfds=5, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebf61439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffebf6154c in g_main_context_iteration ()
   from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff46c1a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffff4665dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffff4490b8a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff6332e45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007ffff449baab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fffee2826db in start_thread (arg=0x7fffc37e0700) at pthread_create.c:463
#9  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fffcd598700 (LWP 23116)):
#0  0x00007ffff3d86bf9 in __GI___poll (fds=0x7fffcd597c28, nfds=1, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebcf8747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fffebcfa36a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
---Type <return> to continue, or q <return> to quit---
#3  0x00007fffcf6ad129 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007ffff449baab in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fffee2826db in start_thread (arg=0x7fffcd598700) at pthread_create.c:463
#6  0x00007ffff3d9388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7ffff7f5e880 (LWP 23092)):
#0  0x00007ffff3d86bf9 in __GI___poll (fds=0x55555a59eca0, nfds=4, timeout=892)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffebf61439 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffebf6154c in g_main_context_iteration ()
   from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff46c1a7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fffcf737ed1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#5  0x00007ffff4665dea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff466efa0 in QCoreApplication::exec() ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x000055555555ca80 in ?? ()
#8  0x00007ffff3c93b97 in __libc_start_main (main=0x55555555c550, argc=1, 
    argv=0x7fffffffdbf8, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7fffffffdbe8) at ../csu/libc-start.c:310
#9  0x000055555555cc1a in _start ()
(gdb) 
(gdb)
Comment 1 Christoph Feck 2018-11-08 20:06:28 UTC 
Crash is in libQt5WebEngineCore.so.5. If this is reproducible, please report it with debug symbol information directly to Qt developers via https://bugreports.qt.io/