Is it possible to have coroutine callback not implementing Sync? about may

[Xudong-Huang]

this is the spawn API

pub unsafe fn spawn<F, T>(f: F) -> JoinHandle<T>
where
    F: FnOnce() -> T + Send + 'static,
    T: Send + 'static,
{
    ......
}

There is no Sync requirement for the passed in closure. I think you are trying to move a ref into the closure. A ref is Send only when it is Sync.

#9 doesn't affect the API signature, what we have to do is make sure the APIs are compatible with libstd

[antoyo]

You're right, I'm using a reference.
Thank you.