Enum "QVariantList" passed to Property breaks property datatype

Ok this is a weird one.

I have a customer, Swift-navigation who has created an enum like so, stored in a 'constants.py' file that they reference around the codebase:

class QTKeys(str, Enum):
    QVARIANTLIST = "QVariantList"
    QVARIANT = "QVariant"

 and they use that to register properties like so:

    model = Property(QTKeys.QVARIANTLIST, fget=model)

With PySide2 this worked fine.

With PySide6, this fails with the following message when referenced from QML:

QMetaProperty::read: Unable to handle unregistered datatype '♀' for property 'Test::model'

It took me quite a while to nail down exactly why the properties were not being registered properly, but I'm glad I did, so I could report this bug.

qvariantlist-property-pyside6.7z is a full example that illustrates the problem.

If you change use_pyside=6 to use_pyside=2, it will import PySide2 instead of PySide6, and illustrate that it works in PySide2.