Bug report

What's wrong

The functions future() and future_save() use Coroutine as parameter types, where Awaitable would be enough.

How is that should be

Use Awaitable as parameter type.

Example failing in type checker but not at execution time

def untap_async[**P](a: Callable[P, Awaitable[object]]) -> Callable[P, Awaitable[None]]:
    async def inner(*args: P.args, **kwargs: P.kwargs) -> None:
        await a(*args, **kwargs)

    return inner


async def foo(): ...

future(untap_async())

System information

• python version: 3.14.2
• returns version: 0.27.0
• pyrefly version: 0.64.1