SyntaxError location for `*args` in class bases is inconsistent

[tusharsadhwani]

Code snippet:

class C(list[int]): ...

On Python 3.9:

>>> class C(list[*a]): ...
 File "<stdin>", line 1
 class C(list[*a]): ...
 ^
SyntaxError: invalid syntax
>>> 

On Python 3.10:

>>> class C(list[*a]): ...
 File "<stdin>", line 1
 class C(list[*a]): ...
 ^
SyntaxError: expected ':'
>>>

I'd have expected it to point directly at the * in both cases.

[AlexWaygood]

Reproduced on 3.9/3.10 (but not on 3.11, where this isn't a SyntaxError at all due to PEP 646).

Cc. @pablogsal

[wookie184]

I believe this is a specific case of #92858, which is fixed by #92894

[tusharsadhwani]

Correct, closing.