SUMMARY
not always the crash is reproducible with the steps below...

STEPS TO REPRODUCE
1. start Wayland session
2. open system settings > Window management > Task switcher 
3. under "Visualization", use the dropdown to select "Breeze" task switcher
4. click on preview button aside the dropdown several time and quickly
5. press ESC quickly to close the previews

OBSERVED RESULT
system settings crashes

EXPECTED RESULT
no crash

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.15.2
KDE Frameworks Version: 5.55.0
Qt Version: 5.12.1



Thread 33 (Thread 0x7fff7e3bd700 (LWP 25989)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., 
    this=0x55555f4aa7c0) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x55555f459990, deadline=...)
    at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x55555f459998, 
    mutex=0x55555f459990, time=<optimized out>)
    at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x55555f459910)
    at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 31 (Thread 0x7fff7ffff700 (LWP 25987)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x55555dcf6680) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x55555dca5320, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x55555dca5328, mutex=0x55555dca5320, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x55555dca52a0) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 30 (Thread 0x7fff96114700 (LWP 25986)):
#0  0x00007ffff64b2c21 in poll () from /usr/lib/libc.so.6
#1  0x00007ffff276f540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007ffff276f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007ffff69e7ce9 in QEventDispatcherGlib::processEvents (this=0x7fffb00229e0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff6990b2c in QEventLoop::exec (this=this@entry=0x7fff96113d40, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007ffff67d4569 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007ffff5b65969 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007ffff67d596c in QThreadPrivate::start (arg=0x55555d6c1bf0) at thread/qthread_unix.cpp:361
#8  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 29 (Thread 0x7fff96d15700 (LWP 25985)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x55555c542aa0) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x55555c4f10e0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x55555c4f10e8, mutex=0x55555c4f10e0, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x55555c4f1060) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 28 (Thread 0x7fff97f5f700 (LWP 25984)):
#0  0x00007ffff64b2c21 in poll () from /usr/lib/libc.so.6
#1  0x00007ffff276f540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007ffff276f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007ffff69e7ce9 in QEventDispatcherGlib::processEvents (this=0x7fffac0e3c10, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff6990b2c in QEventLoop::exec (this=this@entry=0x7fff97f5ed40, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007ffff67d4569 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007ffff5b65969 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007ffff67d596c in QThreadPrivate::start (arg=0x55555c287590) at thread/qthread_unix.cpp:361
#8  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 27 (Thread 0x7fffa7fff700 (LWP 25983)):
#0  0x00007ffff64b2c21 in poll () from /usr/lib/libc.so.6
#1  0x00007ffff276f540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007ffff276f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007ffff69e7ce9 in QEventDispatcherGlib::processEvents (this=0x7fffd808a970, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff6990b2c in QEventLoop::exec (this=this@entry=0x7fffa7ffed40, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007ffff67d4569 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007ffff5b65969 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007ffff67d596c in QThreadPrivate::start (arg=0x55555aaea0c0) at thread/qthread_unix.cpp:361
#8  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 26 (Thread 0x7fffb73fe700 (LWP 25982)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x55555aaf0f90) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x55555ab3f930, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x55555ab3f938, mutex=0x55555ab3f930, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x55555ab3f8b0) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 25 (Thread 0x7fffcbbff700 (LWP 25981)):
#0  0x00007ffff64b2c21 in poll () from /usr/lib/libc.so.6
#1  0x00007ffff276f540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007ffff276f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007ffff69e7ce9 in QEventDispatcherGlib::processEvents (this=0x7fffc000a5d0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff6990b2c in QEventLoop::exec (this=this@entry=0x7fffcbbfed40, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007ffff67d4569 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007ffff5b65969 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007ffff67d596c in QThreadPrivate::start (arg=0x5555573cba70) at thread/qthread_unix.cpp:361
#8  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 24 (Thread 0x7fffcafbe700 (LWP 25980)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x5555573ca6f0) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5555573cdc90, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x5555573cdc98, mutex=0x5555573cdc90, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x5555573cdc10) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 23 (Thread 0x7fffb7bff700 (LWP 25979)):
#0  0x00007ffff64b2c21 in poll () from /usr/lib/libc.so.6
#1  0x00007ffff276f540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007ffff276f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007ffff69e7ce9 in QEventDispatcherGlib::processEvents (this=0x7fffb000a5d0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff6990b2c in QEventLoop::exec (this=this@entry=0x7fffb7bfed40, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007ffff67d4569 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007ffff5b65969 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007ffff67d596c in QThreadPrivate::start (arg=0x555555d2b430) at thread/qthread_unix.cpp:361
#8  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 22 (Thread 0x7fffb496c700 (LWP 25978)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x555556804d20) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x555556808520, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x555556808528, mutex=0x555556808520, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x5555568084a0) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 21 (Thread 0x7fff9f3ae700 (LWP 25977)):
#0  0x00007ffff64b2c21 in poll () from /usr/lib/libc.so.6
#1  0x00007ffff276f540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007ffff276f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007ffff69e7ce9 in QEventDispatcherGlib::processEvents (this=0x7fff90036680, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff6990b2c in QEventLoop::exec (this=this@entry=0x7fff9f3add40, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007ffff67d4569 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007ffff5b65969 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007ffff67d596c in QThreadPrivate::start (arg=0x555557eece50) at thread/qthread_unix.cpp:361
#8  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 20 (Thread 0x7fff94b9e700 (LWP 25974)):
#0  0x00007ffff64b2c21 in poll () from /usr/lib/libc.so.6
#1  0x00007fffec4068b3 in poll (__timeout=-1, __nfds=3, __fds=0x7fffa00e1180) at /usr/include/bits/poll2.h:46
#2  poll_func (ufds=0x7fffa00e1180, nfds=3, timeout=-1, userdata=0x555557ef9c10) at pulse/thread-mainloop.c:69
#3  0x00007fffec3f7bd0 in pa_mainloop_poll (m=m@entry=0x555558051510) at pulse/mainloop.c:824
#4  0x00007fffec3f8220 in pa_mainloop_iterate (m=0x555558051510, block=<optimized out>, retval=0x0) at pulse/mainloop.c:926
#5  0x00007fffec3f82d1 in pa_mainloop_run (m=0x555558051510, retval=retval@entry=0x0) at pulse/mainloop.c:945
#6  0x00007fffec4067ee in thread (userdata=0x55555804d6e0) at pulse/thread-mainloop.c:100
#7  0x00007fffec3a3cec in internal_thread_func (userdata=0x5555580517f0) at pulsecore/thread-posix.c:81
#8  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 17 (Thread 0x7fff9cd3f700 (LWP 25971)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x555557ac3d20) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x555557a45a20, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x555557a45a28, mutex=0x555557a45a20, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x555557a459a0) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 15 (Thread 0x7fff9ffff700 (LWP 25969)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x5555575caf30) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5555575cbfd0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x5555575cbfd8, mutex=0x5555575cbfd0, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x5555575cbf50) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 14 (Thread 0x7fffa620e700 (LWP 25968)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x555557511300) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5555574aba70, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x5555574aba78, mutex=0x5555574aba70, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x5555574ab9f0) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 12 (Thread 0x7fffb560d700 (LWP 25966)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x55555710c690) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x5555570bba60, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x5555570bba68, mutex=0x5555570bba60, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x5555570bb9e0) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 10 (Thread 0x7fffc89cc700 (LWP 25964)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x555556d085a0) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x555556cb69e0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x555556cb69e8, mutex=0x555556cb69e0, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x555556cb6960) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 7 (Thread 0x7fffd4f88700 (LWP 25961)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x555556712730) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x55555671af60, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x55555671af68, mutex=0x55555671af60, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x55555671aee0) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 6 (Thread 0x7fffd6f3a700 (LWP 25960)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff67dbc4c in QWaitConditionPrivate::wait (deadline=..., this=0x55555644ca50) at thread/qwaitcondition_unix.cpp:146
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x55555646e3f0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007ffff67dbd3a in QWaitCondition::wait (this=0x55555646e3f8, mutex=0x55555646e3f0, time=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qdeadlinetimer.h:68
#4  0x00007ffff5eb492d in ?? () from /usr/lib/libQt5Quick.so.5
#5  0x00007ffff5eb4b9c in ?? () from /usr/lib/libQt5Quick.so.5
#6  0x00007ffff67d596c in QThreadPrivate::start (arg=0x55555646e370) at thread/qthread_unix.cpp:361
#7  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#8  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7fffed3c2700 (LWP 25954)):
#0  0x00007ffff4e88afc in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007fffed9e3c94 in ?? () from /usr/lib/dri/i965_dri.so
#2  0x00007fffed9e39b8 in ?? () from /usr/lib/dri/i965_dri.so
#3  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#4  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7fffefb7c700 (LWP 25953)):
#0  0x00007ffff64b2c21 in poll () from /usr/lib/libc.so.6
#1  0x00007ffff276f540 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007ffff276f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007ffff69e7ce9 in QEventDispatcherGlib::processEvents (this=0x7fffe8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff6990b2c in QEventLoop::exec (this=this@entry=0x7fffefb7bd30, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#5  0x00007ffff67d4569 in QThread::exec (this=this@entry=0x7ffff6cd7080 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#6  0x00007ffff6c5bba6 in QDBusConnectionManager::run (this=0x7ffff6cd7080 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#7  0x00007ffff67d596c in QThreadPrivate::start (arg=0x7ffff6cd7080 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:361
#8  0x00007ffff4e82a9d in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007ffff64bdb23 in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7ffff1120840 (LWP 25948)):
#0  0x0000000000000000 in ?? ()
#1  0x00007ffff6df7116 in QGuiApplicationPrivate::processActivatedEvent (e=0x5555620a1010) at kernel/qguiapplication.cpp:2283
#2  0x00007ffff6dfbece in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x5555620a1010) at kernel/qguiapplication.cpp:1858
#3  0x00007ffff6dd575c in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1071
#4  0x00007ffff6dd59d9 in QWindowSystemInterface::flushWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:1035
#5  0x00007ffff0d565e9 in QtWaylandClient::QWaylandWindow::applyConfigure() () from /usr/lib/libQt5WaylandClient.so.5
#6  0x00007ffff69bd152 in QObject::event (this=0x55555dc662c0, e=<optimized out>) at kernel/qobject.cpp:1260
#7  0x00007ffff73f6e24 in QApplicationPrivate::notify_helper (this=this@entry=0x555555595710, receiver=receiver@entry=0x55555dc662c0, e=e@entry=0x555560628b20) at kernel/qapplication.cpp:3753
#8  0x00007ffff73fe6e1 in QApplication::notify (this=0x7fffffffe460, receiver=0x55555dc662c0, e=0x555560628b20) at kernel/qapplication.cpp:3500
#9  0x00007ffff6991e99 in QCoreApplication::notifyInternal2 (receiver=0x55555dc662c0, event=0x555560628b20) at ../../include/QtCore/5.12.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:322
#10 0x00007ffff6994f38 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x55555558cbd0) at kernel/qcoreapplication.cpp:1799
#11 0x00007ffff69e8714 in postEventSourceDispatch (s=0x5555555998f0) at kernel/qeventdispatcher_glib.cpp:276
#12 0x00007ffff276da2f in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#13 0x00007ffff276f5e9 in ?? () from /usr/lib/libglib-2.0.so.0
#14 0x00007ffff276f62e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#15 0x00007ffff69e7ce9 in QEventDispatcherGlib::processEvents (this=0x5555555cd310, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#16 0x00007ffff6990b2c in QEventLoop::exec (this=this@entry=0x7fffffffe380, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#17 0x00007ffff6998e36 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#18 0x000055555555f464 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/systemsettings-5.15.2/app/main.cpp:71