Cannot declare MetaType for a recursive QSet with deleted operator==

struct NoCmpRecursiveSet : public QSet<NoCmpRecursiveSet>
{
    // Works if this line is removed
    bool operator==(const NoCmpRecursiveSet &) const = delete;
};
uint qHash(const NoCmpRecursiveSet &) { return 0; }

Q_DECLARE_METATYPE(NoCmpRecursiveSet);

../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qhashfunctions.h: In instantiation of ‘bool qHashEquals(const T&, const T&) [with T = NoCmpRecursiveSet]’:
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qhash.h:607:32:   required from ‘QHashPrivate::Data<Node>::iterator QHashPrivate::Data<Node>::find(const Key&) const [with Node = QHashPrivate::Node<NoCmpRecursiveSet, QHashDummyValue>; QHashPrivate::Data<Node>::iterator = QHashPrivate::iterator<QHashPrivate::Node<NoCmpRecursiveSet, QHashDummyValue> >; QHashPrivate::Data<Node>::Key = NoCmpRecursiveSet]’
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qhash.h:634:23:   required from ‘QHashPrivate::Data<Node>::InsertionResult QHashPrivate::Data<Node>::findOrInsert(const Key&) [with Node = QHashPrivate::Node<NoCmpRecursiveSet, QHashDummyValue>; QHashPrivate::Data<Node>::Key = NoCmpRecursiveSet]’
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qhash.h:1179:14:   required from ‘QHash<Key, T>::iterator QHash<Key, T>::emplace(Key&&, Args&& ...) [with Args = {const QHashDummyValue&}; Key = NoCmpRecursiveSet; T = QHashDummyValue]’
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qhash.h:1171:68:   required from ‘QHash<Key, T>::iterator QHash<Key, T>::emplace(const Key&, Args&& ...) [with Args = {const QHashDummyValue&}; Key = NoCmpRecursiveSet; T = QHashDummyValue]’
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qhash.h:1149:34:   required from ‘QHash<Key, T>::iterator QHash<Key, T>::insert(const Key&, const T&) [with Key = NoCmpRecursiveSet; T = QHashDummyValue]’
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qset.h:187:56:   [ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/serialization/qdatastream.h:449:45:   required from ‘QDataStreamIfHasIStreamOperatorsContainer<QSet<T>, T> operator>>(QDataStream&, QSet<T>&) [with T = NoCmpRecursiveSet; QDataStreamIfHasIStreamOperatorsContainer<QSet<T>, T> = QDataStream&]’
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/kernel/qmetatype.h:2261:10:   required from ‘static void QtPrivate::QDataStreamOperatorForType<T, <anonymous> >::dataStreamIn(const QtPrivate::QMetaTypeInterface*, QDataStream&, void*) [with T = NoCmpRecursiveSet; bool <anonymous> = true]’
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/kernel/qmetatype.h:2340:54:   required from ‘constexpr const QtPrivate::QMetaTypeInterface QtPrivate::QMetaTypeInterfaceWrapper<NoCmpRecursiveSet>::metaType’
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/kernel/qmetatype.h:2415:12:   required from ‘constexpr const QtPrivate::QMetaTypeInterface* QtPrivate::qMetaTypeInterfaceForType() [with T = NoCmpRecursiveSet]’
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/kernel/qmetatype.h:2476:61:   required from ‘int qRegisterNormalizedMetaType(const QByteArray&) [with T = NoCmpRecursiveSet]’
../untitled/main.cpp:145:1:   required from here
../../cmake-build/qtbase/include/QtCore/../../../../qt5/qtbase/src/corelib/tools/qhashfunctions.h:209:14: error: use of deleted function ‘bool NoCmpRecursiveSet::operator==(const NoCmpRecursiveSet&) const’
  209 |     return a == b;
      |            ~~^~~~
../untitled/main.cpp:142:10: note: declared here
  142 |     bool operator==(const NoCmpRecursiveSet &) const = delete;
      |          ^~~~~~~~