ices/98604.sh: fixed with errors

[github-actions]

Issue: rust-lang/rust#98604

#!/bin/bash

rustc --edition=2021 - <<'EOF'

type AsyncFnPtr = Box<
    dyn Fn() -> std::pin::Pin<Box<dyn std::future::Future<Output = ()>>>,
>;

async fn test() {}

#[allow(unused_must_use)]
fn main() {
    Box::new(test) as AsyncFnPtr;
}

EOF

=== stdout ===
=== stderr ===
error[E0271]: type mismatch resolving `<fn() -> impl Future<Output = ()> {test} as FnOnce<()>>::Output == Pin<Box<(dyn Future<Output = ()> + 'static)>>`
  --> <anon>:10:5
   |
10 |     Box::new(test) as AsyncFnPtr;
   |     ^^^^^^^^^^^^^^ expected struct `Pin`, found opaque type
   |
note: while checking the return type of the `async fn`
  --> <anon>:6:17
   |
6  | async fn test() {}
   |                 ^ checked the `Output` of this `async fn`, found opaque type
   = note:   expected struct `Pin<Box<(dyn Future<Output = ()> + 'static)>>`
           found opaque type `impl Future<Output = ()>`
   = note: required for the cast from `fn() -> impl Future<Output = ()> {test}` to the object type `dyn Fn() -> Pin<Box<(dyn Future<Output = ()> + 'static)>>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0271`.
==============