tests/ui/type-alias-impl-trait/issue-98604.rs

   1 // edition:2018
   2
   3 type AsyncFnPtr = Box<dyn Fn() -> std::pin::Pin<Box<dyn std::future::Future<Output = ()>>>>;
   4
   5 async fn test() {}
   6
   7 #[allow(unused_must_use)]
   8 fn main() {
   9     Box::new(test) as AsyncFnPtr;
  10     //~^ ERROR expected `fn() -> impl Future<Output = ()> {test}` to be a fn item that returns `Pin<Box<(dyn Future<Output = ()> + 'static)>>`, but it returns `impl Future<Output = ()>`
  11 }