no error when using generic in `except` block

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from typing import Generic, TypeVar

T = TypeVar("T")


class Foo(Exception, Generic[T]): ...


try:
    raise Foo
except Foo[int]: # no error, crashes at runtime
    ...

playground

this should be a type error because it fails at runtime with the following exception:

TypeError: catching classes that do not inherit from BaseException is not allowed