from dataclasses import dataclass

@dataclass(frozen=True, slots=True)
class Foo[T]:
  pass

foo = Foo() # this line works
foo = Foo[int]() # this one does not

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python3.12/typing.py", line 1142, in __call__
    result.__orig_class__ = self
    ^^^^^^^^^^^^^^^^^^^^^
  File "<string>", line 5, in __setattr__
TypeError: super(type, obj): obj must be an instance or subtype of type