Application: okular (1.4.1)
 (Compiled from sources)
Qt Version: 5.10.1
Frameworks Version: 5.46.0
Operating System: Linux 4.16.8-1-zen x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:

I was reading a pdf, then i did alt-tab to surf the web and okular crashed alone.

-- Backtrace:
Application: Okular (okular), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f39f175ee80 (LWP 4225))]

Thread 3 (Thread 0x7f39d59e5700 (LWP 4227)):
#0  0x00007f39ed437ea9 in poll () at /usr/lib/libc.so.6
#1  0x00007f39e7e1f523 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f39e7e1f63e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f39edd88254 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f39edd2a31b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f39edb3971e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f39ee1ab416 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f39edb3eabd in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f39ea3f0075 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f39ed44253f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f39df7aa700 (LWP 4226)):
#0  0x00007f39ed437ea9 in poll () at /usr/lib/libc.so.6
#1  0x00007f39ea816180 in  () at /usr/lib/libxcb.so.1
#2  0x00007f39ea817e4b in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f39e255582a in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f39edb3eabd in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f39ea3f0075 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f39ed44253f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f39f175ee80 (LWP 4225)):
[KCrash Handler]
#6  0x00007f39ed38086b in raise () at /usr/lib/libc.so.6
#7  0x00007f39ed36b40e in abort () at /usr/lib/libc.so.6
#8  0x00007f39d709dd80 in pa_fdsem_post () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#9  0x00007f39d70b651c in pa_srbchannel_write () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#10 0x00007f39d70b46d6 in  () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#11 0x00007f39d70b5850 in  () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#12 0x00007f39d70b5b8a in  () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#13 0x00007f39d70b6440 in  () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#14 0x00007f39d74fedb0 in  () at /usr/lib/libpulse-mainloop-glib.so.0
#15 0x00007f39e7e1f368 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#16 0x00007f39e7e1f5b1 in  () at /usr/lib/libglib-2.0.so.0
#17 0x00007f39e7e1f63e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#18 0x00007f39edd88231 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007f39e25dd482 in  () at /usr/lib/libQt5XcbQpa.so.5
#20 0x00007f39edd2a31b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#21 0x00007f39edd33718 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#22 0x0000557cac9b5685 in  ()
#23 0x00007f39ed36d06b in __libc_start_main () at /usr/lib/libc.so.6
#24 0x0000557cac9b6d4a in _start ()

Reported using DrKonqi