Application: dragon (18.04.2)

Qt Version: 5.11.1
Frameworks Version: 5.47.0
Operating System: Linux 4.17.2-1-ARCH x86_64
Distribution: "Arch Linux"

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

On a work i found some strange music file and then i was opened that in Dragon Player, music was playing normally, but media player crashed after close button clicked

The crash can be reproduced every time.

-- Backtrace:
Application: Dragon Player (dragon), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7ac73f8ec0 (LWP 23591))]

Thread 4 (Thread 0x7f7a931bf700 (LWP 23597)):
#0  0x00007f7abf86cffc in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f7a9cb3e0a4 in  () at /usr/lib/dri/nouveau_dri.so
#2  0x00007f7a9cb3dd98 in  () at /usr/lib/dri/nouveau_dri.so
#3  0x00007f7abf867075 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f7ac25d053f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f7aabb5f700 (LWP 23593)):
#0  0x00007f7abcdbb2f4 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f7abcd733ac in g_main_context_acquire () at /usr/lib/libglib-2.0.so.0
#2  0x00007f7abcd743d7 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f7abcd7463e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f7ac3285054 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f7ac323094c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f7ac3079a99 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f7ac36dc976 in  () at /usr/lib/libQt5DBus.so.5
#8  0x00007f7ac3083b45 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f7abf867075 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f7ac25d053f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f7ab3777700 (LWP 23592)):
#0  0x00007f7ac25c5ea9 in poll () at /usr/lib/libc.so.6
#1  0x00007f7abf424180 in  () at /usr/lib/libxcb.so.1
#2  0x00007f7abf425e4b in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f7ab635122a in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f7ac3083b45 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f7abf867075 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f7ac25d053f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f7ac73f8ec0 (LWP 23591)):
[KCrash Handler]
#6  0x00007f7ac250e86b in raise () at /usr/lib/libc.so.6
#7  0x00007f7ac24f940e in abort () at /usr/lib/libc.so.6
#8  0x00007f7abae648c1 in  () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#9  0x00007f7abae652cf in pa_fdsem_after_poll () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#10 0x00007f7abae7d45e in  () at /usr/lib/pulseaudio/libpulsecommon-11.1.so
#11 0x00007f7abedb1db0 in  () at /usr/lib/libpulse-mainloop-glib.so.0
#12 0x00007f7abcd74368 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#13 0x00007f7abcd745b1 in  () at /usr/lib/libglib-2.0.so.0
#14 0x00007f7abcd7463e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#15 0x00007f7ac3285039 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#16 0x00007f7ab63e6722 in  () at /usr/lib/libQt5XcbQpa.so.5
#17 0x00007f7ac323094c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#18 0x00007f7ac3238c46 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#19 0x0000557c6bf07e12 in  ()
#20 0x00007f7ac24fb06b in __libc_start_main () at /usr/lib/libc.so.6
#21 0x0000557c6bf07fda in _start ()

Reported using DrKonqi