(gdb) thread apply all bt

Thread 5 (Thread 0x7ff9a51c5700 (LWP 22153)):
#0  0x00007ff9b537832d in poll () from /lib64/libc.so.6
#1  0x00007ff9b4ae3ac2 in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007ff9b4ae572f in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007ff9a6cfdcb9 in ?? () from /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007ff9b56d4082 in ?? () from /usr/lib64/libQt5Core.so.5
#5  0x00007ff9b31f2444 in start_thread () from /lib64/libpthread.so.0
#6  0x00007ff9b538130d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7ff993318700 (LWP 22220)):
#0  0x00007ff9b537832d in poll () from /lib64/libc.so.6
#1  0x00007ff9b249deec in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007ff9b249dffc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007ff9b58cb847 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib64/libQt5Core.so.5
#4  0x00007ff9b587d41a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007ff9b56cf6d4 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007ff9b56d4082 in ?? () from /usr/lib64/libQt5Core.so.5
#7  0x00007ff9b31f2444 in start_thread () from /lib64/libpthread.so.0
#8  0x00007ff9b538130d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7ff9835e7700 (LWP 29419)):
#0  0x00007ff9b31f83b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ff983dbb8eb in vlc_cond_timedwait () from /usr/lib64/libvlccore.so.8
---Type <return> to continue, or q <return> to quit---
#2  0x00007ff983d7e07c in ?? () from /usr/lib64/libvlccore.so.8
#3  0x00007ff983d7eb55 in ?? () from /usr/lib64/libvlccore.so.8
#4  0x00007ff9b31f2444 in start_thread () from /lib64/libpthread.so.0
#5  0x00007ff9b538130d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7ff980137700 (LWP 29421)):
#0  0x00007ff9b5382b27 in semop () from /lib64/libc.so.6
#1  0x00007ff98366afd7 in ?? () from /usr/lib64/libasound.so.2
#2  0x00007ff983639196 in snd_pcm_recover () from /usr/lib64/libasound.so.2
#3  0x00007ff9900261bf in ?? () from /usr/lib64/vlc/plugins/audio_output/libalsa_plugin.so
#4  0x00007ff983d98f83 in ?? () from /usr/lib64/libvlccore.so.8
#5  0x00007ff983d6cc12 in ?? () from /usr/lib64/libvlccore.so.8
#6  0x00007ff983d6e06b in ?? () from /usr/lib64/libvlccore.so.8
#7  0x00007ff9b31f2444 in start_thread () from /lib64/libpthread.so.0
#8  0x00007ff9b538130d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7ff9b6a8e800 (LWP 22151)):
#0  0x00007ff9b537832d in poll () from /lib64/libc.so.6
#1  0x00007ff9b249deec in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007ff9b249dffc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007ff9b58cb847 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib64/libQt5Core.so.5
#4  0x00007ff9b587d41a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#5  0x00007ff9b58846fc in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
#6  0x00007ff9a6db5c88 in kdemain () from /usr/lib64/libkdeinit5_kded5.so
---Type <return> to continue, or q <return> to quit---
#7  0x0000000000408560 in ?? ()
#8  0x000000000040594d in main ()
(gdb)