property'stp_init hasthis code:

    if (Py_IS_TYPE(self, &PyProperty_Type)) {        Py_XSETREF(self->prop_doc, prop_doc);    } else {        /* If this is a property subclass, put __doc__           in dict of the subclass instance instead,           otherwise it gets shadowed by __doc__ in the           class's dict. */        /*...*/         PyObject_SetAttr((PyObject *)self, &_Py_ID(__doc__), prop_doc);        /*...*/    }

This assumes that subclasses ofproperty have a__dict__ (or a__doc__ attribute settable by other means). That is the case when subclassed using theclass statement, but might not be true using C.
A C-API reproducer is athttps://github.com/wjakob/inheritance_issue/blob/master/inheritance_issue.c

I don't see a good way to fix this. We could:

• document that subclasses need to setPy_TPFLAGS_MANAGED_DICT (or provide a__doc__ descriptor), or
• ignore theAttributeError, unless__doc__ was set explicitly?

• PR:gh-98963: Add a note to the error for property subclasses without __doc__ #99058

• PR:gh-98963: Restore the ability to have a dict-less property. #105262

• PR:[3.12] gh-98963: Restore the ability to have a dict-less property. (GH-105262) #105297