I'm sharing some info from gdb bt maybe someone will know more.
(gdb) bt
#0 0x00007ffff631a8bf in poll () at /usr/lib/glibc-hwcaps/x86-64-v3/libc.so.6
#1 0x00007ffff5316e57 in ??? () at /usr/lib/libglib-2.0.so.0
#2 0x00007ffff5317571 in g_main_context_iteration ()
at /usr/lib/libglib-2.0.so.0
#3 0x00007ffff6cd31cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4 0x00007ffff6c66906 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
() at /usr/lib/libQt5Core.so.5
#5 0x00007ffff6c6ba24 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#6 0x000000000040b2d7 in main ()
(gdb)
Edit.
I have qt5-base installed.
eopkg sf libQt5Core.so.5
Szukanie : libQt5Core.so.5
Package qt5-base has file /usr/lib64/libQt5Core.so.5
Package qt5-base has file /usr/lib64/libQt5Core.so.5.15
Package qt5-base has file /usr/lib64/libQt5Core.so.5.15.12
eopkg li | grep qt5-base
qt5-base - Cross platform application and UI framework
qt5-base-devel - Development files for qt5-base