Bug#980906: libpython3.9: _collections_abc.py :type 'types.GenericAlias' is not an acceptable base type

[mike_san12]

Package: libpython3.9
Followup-For: Bug #980906


The correct workaround is:

class _CallableGenericAlias(type(list[int])):

i.e. with type(), because GenericAlias = type(list[int]) in _collections_abc.py.
Semantically, it is intended to make a generic type and list[int] be of the 
same type.



The bug is not in 3.9.1-2.