Py_TYPE(lhs)->tp_as_mapping->mp_subscript is not the same as Dict_Type.tp_as_mapping->mp_subscript when it should be #132284
Description
A dict subclass which does not override __getitem__ (like collections.Counter) should have Dict_Type.tp_as_mapping->mp_subscript as its Py_TYPE(lhs)->tp_as_mapping->mp_subscript, but they are not the same.
CC @ericsnowcurrently .