Hi, I ran into the following problem. When using QML debugging, segmentation fault occurs immediately with the following stack

1 QFont::family() const 0x7ffff7585a55
2 QQuickFontValueType::family() const 0x7ffff0da2b12
3 QQuickFontValueType::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *) 0x7ffff0da31a0
4 QMetaProperty::read(QObject const *) const 0x7ffff6cbe8ea
5 QQmlWatchProxy::notifyValueChanged() 0x7ffff10b812f
6 QQmlWatcher::addPropertyWatch(int, QObject *, unsigned int, QMetaProperty const&) 0x7ffff10b93c7
7 QQmlWatcher::addWatch(int, unsigned int) 0x7ffff10b9755
8 QQmlEngineDebugServiceImpl::processMessage(QByteArray const&) 0x7ffff10b2e41
9 QObject::event(QEvent *) 0x7ffff6d01097
10 QCoreApplication::notifyInternal2(QObject *, QEvent *) 0x7ffff6caf0fa
11 QCoreApplicationPrivate::sendPostedEvents(QObject *, int, QThreadData *) 0x7ffff6cb2384
12 postEventSourceDispatch(_GSource *, int ( *)(void *), void *) 0x7ffff6f6bc67
13 g_main_context_dispatch 0x7ffff617417d
14 ?? 0x7ffff6174400
15 g_main_context_iteration 0x7ffff61744a3
16 QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) 0x7ffff6f6b578
17 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) 0x7ffff6cbaf1b
18 QCoreApplication::exec() 0x7ffff6cb69e6
19 main main.cpp 19 0x555555556779

If I remove "font.bold: true"(in main.qml) error does not occur. Moreover, if you set any property for fonts, segfault also crashes. There are no such errors during the release build.

Source code in attachments