https://bugs.kde.org/show_bug.cgi?id=423040

--- Comment #2 from Dan Leinir Turthra Jensen <ad...@leinir.dk> ---
Here's a backtrace (with a bit of extra context) from running it through gdb:

file:///usr/share/plasma/plasmoids/org.kde.plasma.systemmonitor/contents/config/config.qml:16:
TypeError: Cannot read property 'length' of undefined
file:///usr/lib64/qt5/qml/org/kde/kirigami.2/templates/SwipeListItem.qml:200:5:
QML Connections: Implicitly defined onFoo properties in Connections are
deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib64/qt5/qml/org/kde/kirigami.2/templates/SwipeListItem.qml:200:5:
QML Connections: Implicitly defined onFoo properties in Connections are
deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib64/qt5/qml/org/kde/kirigami.2/templates/SwipeListItem.qml:200:5:
QML Connections: Implicitly defined onFoo properties in Connections are
deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib64/qt5/qml/org/kde/kirigami.2/templates/SwipeListItem.qml:200:5:
QML Connections: Implicitly defined onFoo properties in Connections are
deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib64/qt5/qml/org/kde/kirigami.2/templates/SwipeListItem.qml:200:5:
QML Connections: Implicitly defined onFoo properties in Connections are
deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib64/qt5/qml/org/kde/kirigami.2/templates/SwipeListItem.qml:200:5:
QML Connections: Implicitly defined onFoo properties in Connections are
deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:49:5:
Unable to assign [undefined] to bool
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:50:5:
Unable to assign [undefined] to double
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:51:5:
Unable to assign [undefined] to double
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:54:9:
Unable to assign [undefined] to double
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:55:9:
Unable to assign [undefined] to double
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:56:9:
Unable to assign [undefined] to bool
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:49:5:
Unable to assign [undefined] to bool
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:50:5:
Unable to assign [undefined] to double
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:51:5:
Unable to assign [undefined] to double
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:54:9:
Unable to assign [undefined] to double
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:55:9:
Unable to assign [undefined] to double
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.piechart/contents/ui/PieChart.qml:56:9:
Unable to assign [undefined] to bool
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.linechart/contents/ui/FullRepresentation.qml:56:9:
QML ExtendedLegend: Binding loop detected for property "implicitHeight"
[Thread 0x7fff9b1ef700 (LWP 29700) exited]
[New Thread 0x7fff9b1ef700 (LWP 29720)]
file:///usr/share/plasma/plasmoids/org.kde.plasma.systemmonitor/contents/config/config.qml:16:
TypeError: Cannot read property 'length' of undefined
Cyclic dependency detected between
"file:///usr/lib64/qt5/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml"
and
"file:///usr/lib64/qt5/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml"
QQmlEngine::setContextForObject(): Object already has a QQmlContext
file:///usr/share/plasma/plasmoids/org.kde.plasma.systemmonitor/contents/ui/config/ConfigAppearance.qml:46:5:
QML Connections: Implicitly defined onFoo properties in Connections are
deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }

Thread 1 "plasmashell" received signal SIGSEGV, Segmentation fault.
QQmlData::wasDeleted (object=0x555555aa05d0) at
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/include/QtQml/5.15.0/QtQml/private/../../../../../src/qml/qml/qqmldata_p.h:342
342    
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/include/QtQml/5.15.0/QtQml/private/../../../../../src/qml/qml/qqmldata_p.h:
No such file or directory.
(gdb) thread apply all bt

Thread 20 (Thread 0x7fff9b1ef700 (LWP 29720)):
#0  0x00007ffff5827fef in poll () at /lib64/libc.so.6
#1  0x00007ffff41e15de in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007ffff41e16ff in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#3  0x00007ffff5de0f4f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7fff8402cc20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#4  0x00007ffff5d884cb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7fff9b1eed80, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007ffff5baa73e in QThread::exec() (this=this@entry=0x5555596206e0) at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007ffff754a5d5 in QQmlThreadPrivate::run() (this=0x5555596206e0) at
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/src/qml/qml/ftw/qqmlthread.cpp:155
#7  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x5555596206e0) at
thread/qthread_unix.cpp:342
#8  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#9  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 18 (Thread 0x7fffa57af700 (LWP 29636)):
#0  0x00007ffff5827fef in poll () at /lib64/libc.so.6
#1  0x00007ffff41e15de in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007ffff41e16ff in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#3  0x00007ffff5de0f4f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7fff94000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#4  0x00007ffff5d884cb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7fffa57aed60, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007ffff5baa73e in QThread::exec() (this=<optimized out>) at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007fffa5cee428 in KCupsConnection::run() () at
/usr/lib64/libkcupslib.so
#7  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x5555584b5050) at
thread/qthread_unix.cpp:342
#8  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#9  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 17 (Thread 0x7fffa77fe700 (LWP 29631)):
#0  0x00007ffff4f55b08 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007ffff5bb1554 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(deadline=..., this=0x7fffcd0bfc70) at thread/qwaitcondition_unix.cpp:136
#2  0x00007ffff5bb1554 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., deadline=..., this=0x7fffcd0bfc70) at
thread/qwaitcondition_unix.cpp:144
#3  0x00007ffff5bb1554 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=this@entry=0x7fffcc005680, mutex=mutex@entry=0x7fffcc00aaf8,
deadline=...) at thread/qwaitcondition_unix.cpp:225
#4  0x00007ffff5baf901 in QThreadPoolThread::run() (this=0x7fffcc005670) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:270
#5  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x7fffcc005670) at
thread/qthread_unix.cpp:342
#6  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#7  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 16 (Thread 0x7fffa7fff700 (LWP 29630)):
--Type <RET> for more, q to quit, c to continue without paging--
#0  0x00007ffff4f55b08 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007ffff5bb1554 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(deadline=..., this=0x7fffcd0bf7c0) at thread/qwaitcondition_unix.cpp:136
#2  0x00007ffff5bb1554 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., deadline=..., this=0x7fffcd0bf7c0) at
thread/qwaitcondition_unix.cpp:144
#3  0x00007ffff5bb1554 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=this@entry=0x7fffcc0058f0, mutex=mutex@entry=0x7fffcc00aaf8,
deadline=...) at thread/qwaitcondition_unix.cpp:225
#4  0x00007ffff5baf901 in QThreadPoolThread::run() (this=0x7fffcc0058e0) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:270
#5  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x7fffcc0058e0) at
thread/qthread_unix.cpp:342
#6  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#7  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7fffc4cf1700 (LWP 29629)):
#0  0x00007ffff4f55b08 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007ffff5bb1554 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(deadline=..., this=0x7fffcd0bf350) at thread/qwaitcondition_unix.cpp:136
#2  0x00007ffff5bb1554 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., deadline=..., this=0x7fffcd0bf350) at
thread/qwaitcondition_unix.cpp:144
#3  0x00007ffff5bb1554 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=this@entry=0x7fffcc005c50, mutex=mutex@entry=0x7fffcc00aaf8,
deadline=...) at thread/qwaitcondition_unix.cpp:225
#4  0x00007ffff5baf901 in QThreadPoolThread::run() (this=0x7fffcc005c40) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:270
#5  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x7fffcc005c40) at
thread/qthread_unix.cpp:342
#6  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#7  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7fffc54f2700 (LWP 29628)):
#0  0x00007ffff4f55b08 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007ffff5bb1554 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(deadline=..., this=0x7fffcd0beee0) at thread/qwaitcondition_unix.cpp:136
#2  0x00007ffff5bb1554 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., deadline=..., this=0x7fffcd0beee0) at
thread/qwaitcondition_unix.cpp:144
#3  0x00007ffff5bb1554 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=this@entry=0x7fffcc005bf0, mutex=mutex@entry=0x7fffcc00aaf8,
deadline=...) at thread/qwaitcondition_unix.cpp:225
#4  0x00007ffff5baf901 in QThreadPoolThread::run() (this=0x7fffcc005be0) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:270
#5  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x7fffcc005be0) at
thread/qthread_unix.cpp:342
#6  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#7  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7fffc5cf3700 (LWP 29627)):
#0  0x00007ffff4f55b08 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007ffff5bb1554 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(deadline=..., this=0x7fffcd0bea70) at thread/qwaitcondition_unix.cpp:136
#2  0x00007ffff5bb1554 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., deadline=..., this=0x7fffcd0bea70) at
thread/qwaitcondition_unix.cpp:144
#3  0x00007ffff5bb1554 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=this@entry=0x7fffcc005ad0, mutex=mutex@entry=0x7fffcc00aaf8,
deadline=...) at thread/qwaitcondition_unix.cpp:225
#4  0x00007ffff5baf901 in QThreadPoolThread::run() (this=0x7fffcc005ac0) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:270
#5  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x7fffcc005ac0) at
thread/qthread_unix.cpp:342
--Type <RET> for more, q to quit, c to continue without paging--
#6  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#7  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7fffc64f4700 (LWP 29626)):
#0  0x00007ffff4f55b08 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007ffff5bb1554 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(deadline=..., this=0x7fffcd0be600) at thread/qwaitcondition_unix.cpp:136
#2  0x00007ffff5bb1554 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., deadline=..., this=0x7fffcd0be600) at
thread/qwaitcondition_unix.cpp:144
#3  0x00007ffff5bb1554 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=this@entry=0x7fffcc005b90, mutex=mutex@entry=0x7fffcc00aaf8,
deadline=...) at thread/qwaitcondition_unix.cpp:225
#4  0x00007ffff5baf901 in QThreadPoolThread::run() (this=0x7fffcc005b80) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:270
#5  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x7fffcc005b80) at
thread/qthread_unix.cpp:342
#6  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#7  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7fffc6cf5700 (LWP 29625)):
#0  0x00007ffff4f55b08 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007ffff5bb1554 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(deadline=..., this=0x7fffcd0be190) at thread/qwaitcondition_unix.cpp:136
#2  0x00007ffff5bb1554 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., deadline=..., this=0x7fffcd0be190) at
thread/qwaitcondition_unix.cpp:144
#3  0x00007ffff5bb1554 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=this@entry=0x7fffcc005710, mutex=mutex@entry=0x7fffcc00aaf8,
deadline=...) at thread/qwaitcondition_unix.cpp:225
#4  0x00007ffff5baf901 in QThreadPoolThread::run() (this=0x7fffcc005700) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:270
#5  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x7fffcc005700) at
thread/qthread_unix.cpp:342
#6  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#7  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7fffd48d1700 (LWP 29624)):
#0  0x00007ffff4f55b08 in pthread_cond_timedwait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007ffff5bb1554 in QWaitConditionPrivate::wait_relative(QDeadlineTimer)
(deadline=..., this=0x7fffcd0bddf0) at thread/qwaitcondition_unix.cpp:136
#2  0x00007ffff5bb1554 in QWaitConditionPrivate::wait(QDeadlineTimer)
(deadline=..., deadline=..., this=0x7fffcd0bddf0) at
thread/qwaitcondition_unix.cpp:144
#3  0x00007ffff5bb1554 in QWaitCondition::wait(QMutex*, QDeadlineTimer)
(this=this@entry=0x7fffcc005000, mutex=mutex@entry=0x7fffcc00aaf8,
deadline=...) at thread/qwaitcondition_unix.cpp:225
#4  0x00007ffff5baf901 in QThreadPoolThread::run() (this=0x7fffcc004ff0) at
../../include/QtCore/../../src/corelib/thread/qmutex.h:270
#5  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x7fffcc004ff0) at
thread/qthread_unix.cpp:342
#6  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#7  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7fffd50d4700 (LWP 29623)):
#0  0x00007ffff5827fef in poll () at /lib64/libc.so.6
#1  0x00007ffff41e15de in  () at /usr/lib64/libglib-2.0.so.0
--Type <RET> for more, q to quit, c to continue without paging--
#2  0x00007ffff41e16ff in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#3  0x00007ffff5de0f4f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7fffcc000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#4  0x00007ffff5d884cb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7fffd50d3d60, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007ffff5baa73e in QThread::exec() (this=this@entry=0x5555561bbb90) at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007ffff78008d6 in QQuickPixmapReader::run() (this=0x5555561bbb90) at
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/src/quick/util/qquickpixmapcache.cpp:1008
#7  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x5555561bbb90) at
thread/qthread_unix.cpp:342
#8  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#9  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7fffd77fe700 (LWP 29621)):
#0  0x00007ffff4f557e2 in pthread_cond_wait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007fffe9a0b08b in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007fffe9a0af37 in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#4  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7fffd7fff700 (LWP 29620)):
#0  0x00007ffff4f557e2 in pthread_cond_wait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007fffe9a0b08b in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007fffe9a0af37 in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#4  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7fffe8bb7700 (LWP 29619)):
#0  0x00007ffff4f557e2 in pthread_cond_wait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007fffe9a0b08b in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007fffe9a0af37 in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#4  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7fffe93b8700 (LWP 29618)):
#0  0x00007ffff4f557e2 in pthread_cond_wait@@GLIBC_2.3.2 () at
/lib64/libpthread.so.0
#1  0x00007fffe9a0b08b in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007fffe9a0af37 in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#4  0x00007ffff5832b1f in clone () at /lib64/libc.so.6
--Type <RET> for more, q to quit, c to continue without paging--

Thread 4 (Thread 0x7fffeb5ef700 (LWP 29600)):
#0  0x00007ffff5827fef in poll () at /lib64/libc.so.6
#1  0x00007ffff41e15de in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007ffff41e16ff in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#3  0x00007ffff5de0f4f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7fffe0000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#4  0x00007ffff5d884cb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7fffeb5eed80, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007ffff5baa73e in QThread::exec() (this=this@entry=0x55555593aee0) at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007ffff754a5d5 in QQmlThreadPrivate::run() (this=0x55555593aee0) at
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/src/qml/qml/ftw/qqmlthread.cpp:155
#7  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x55555593aee0) at
thread/qthread_unix.cpp:342
#8  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#9  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7ffff0a42700 (LWP 29599)):
#0  0x00007ffff5827fef in poll () at /lib64/libc.so.6
#1  0x00007ffff41e15de in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007ffff41e16ff in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#3  0x00007ffff5de0f4f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7fffe4000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#4  0x00007ffff5d884cb in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7ffff0a41d50, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007ffff5baa73e in QThread::exec() (this=<optimized out>) at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007ffff6f05a17 in  () at /usr/lib64/libQt5DBus.so.5
#7  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x7ffff6f72d80) at
thread/qthread_unix.cpp:342
#8  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#9  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7ffff1623700 (LWP 29598)):
#0  0x00007ffff5827fef in poll () at /lib64/libc.so.6
#1  0x00007ffff7cc4862 in  () at /usr/lib64/libxcb.so.1
#2  0x00007ffff7cc626c in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007ffff17f4f50 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007ffff5bab871 in QThreadPrivate::start(void*) (arg=0x555555628f40) at
thread/qthread_unix.cpp:342
#5  0x00007ffff4f4eeaa in start_thread () at /lib64/libpthread.so.0
#6  0x00007ffff5832b1f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7ffff36e6800 (LWP 29585)):
#0  0x00007ffff73d6325 in QQmlData::wasDeleted(QObject const*)
(object=0x555555aa05d0) at
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/include/QtQml/5.15.0/QtQml/private/../../../../../src/qml/qml/qqmldata_p.h:342
--Type <RET> for more, q to quit, c to continue without paging--
#1  0x00007ffff73d6325 in QQmlData::wasDeleted(QObject const*)
(object=0x555555aa05d0) at
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/include/QtQml/5.15.0/QtQml/private/../../../../../src/qml/qml/qqmldata_p.h:332
#2  0x00007ffff73d6325 in
QV4::QObjectWrapper::getQmlProperty(QV4::ExecutionEngine*, QQmlContextData*,
QObject*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*,
QQmlPropertyData**) (engine=engine@entry=0x555555892130,
qmlContext=qmlContext@entry=0x555558f51110, object=0x555555aa05d0,
name=0x7fffea9b05a8,
revisionMode=revisionMode@entry=QV4::QObjectWrapper::CheckRevision,
hasProperty=hasProperty@entry=0x7fffffffca58, property=0x7fffffffca60) at
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/src/qml/jsruntime/qv4qobjectwrapper.cpp:360
#3  0x00007ffff73b5d1a in
QV4::QQmlContextWrapper::getPropertyAndBase(QV4::QQmlContextWrapper const*,
QV4::PropertyKey, QV4::Value const*, bool*, QV4::Value*, QV4::Lookup*)
(resource=<optimized out>, id=..., receiver=<optimized out>,
hasProperty=0x7fffffffcad7, base=0x0, lookup=0x0) at
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/include/QtQml/5.15.0/QtQml/private/../../../../../src/qml/common/qv4staticvalue_p.h:325
#4  0x00007ffff73b65e3 in
QV4::QQmlContextWrapper::resolveQmlContextPropertyLookupGetter(QV4::Lookup*,
QV4::ExecutionEngine*, QV4::Value*) (l=0x5555593b0ac0, engine=0x555555892130,
base=0x0) at
/usr/src/debug/libqt5-qtdeclarative-5.15.0-1.1.x86_64/include/QtQml/5.15.0/QtQml/private/../../../../../src/qml/common/qv4staticvalue_p.h:325
#5  0x00007fff99f2dc02 in  ()
#6  0x0000000000000000 in  ()
(gdb)

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