Incompatible type when using ParamSpec

[NeilGirdhar]

Maybe I've misunderstood how parameter specification variables are supposed to used, but this is what I have:

from typing import TypeVar, Generic, ParamSpec, Protocol, Callable
from functools import partial

T = TypeVar("T", covariant=True)
P = ParamSpec("P")

class JittedFunction(Protocol, Generic[P, T]):
 def __call__(self, *args: P.args, **kwargs: P.kwargs) -> T:
 ...

 def lower(self) -> int:
 ...

def jit(fun: Callable[P, T], *, x: int) -> JittedFunction[P, T]:
 pass

@partial(jit, x=2) # error: Argument 1 to "partial" has incompatible type "Callable[[Callable[P, Any], NamedArg(int, 'x')], JittedFunction[P]]"; expected "Callable[..., JittedFunction[P]]" [arg-type]
def f(y: int) -> int:
 return y

[erictraut]

Your code looks correct to me. This type checks without errors in pyright.

[NeilGirdhar]

Thanks @erictraut ! You're always very helpful.

[ilevkivskyi]

Original example works on master, likely fixed by #15837