[issue45664] resolve_bases() and new_class() do not work with type alias of a built-in type

[Serhiy Storchaka]

New submission from Serhiy Storchaka <storchaka+cpython at gmail.com>:

resolve_bases() returns incorrect result:

>>> import types
>>> types.resolve_bases((list[int],))
(list[int],)

Expected (list,).

new_class() fails:

>>> types.new_class('L', (list[int],), {})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/serhiy/py/cpython/Lib/types.py", line 77, in new_class
    return meta(name, resolved_bases, ns, **kwds)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: GenericAlias expected 2 arguments, got 3

Both work well with typing.List[int].

----------
components: Library (Lib)
messages: 405265
nosy: gvanrossum, kj, serhiy.storchaka, yselivanov
priority: normal
severity: normal
status: open
title: resolve_bases() and new_class() do not work with type alias of a built-in type
type: behavior
versions: Python 3.10, Python 3.11, Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45664>
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