ices/84841.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#84841

async fn main() {
    // Adding an .await here avoids the ICE
    test()?;
}

// Removing the const generic parameter here avoids the ICE
async fn test<const N: usize>() {
}

=== stdout ===
=== stderr ===
error[E0277]: the `?` operator can only be applied to values that implement `Try`
 --> /home/runner/work/glacier/glacier/ices/84841.rs:3:5
  |
3 |     test()?;
  |     ^^^^^^^ the `?` operator cannot be applied to type `impl Future`
  |
  = help: the trait `Try` is not implemented for `impl Future`
  = note: required by `branch`

error[E0277]: the `?` operator can only be used in an async function that returns `Result` or `Option` (or another type that implements `FromResidual`)
 --> /home/runner/work/glacier/glacier/ices/84841.rs:3:11
  |
1 |   async fn main() {
  |  _________________-
2 | |     // Adding an .await here avoids the ICE
3 | |     test()?;
  | |           ^ cannot use the `?` operator in an async function that returns `()`
4 | | }
  | |_- this function should return `Result` or `Option` to accept `?`
  |
  = help: the trait `FromResidual<_>` is not implemented for `()`
  = note: required by `from_residual`

error[E0752]: `main` function is not allowed to be `async`
 --> /home/runner/work/glacier/glacier/ices/84841.rs:1:1
  |
1 | async fn main() {
  | ^^^^^^^^^^^^^^^ `main` function is not allowed to be `async`

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0277, E0752.
For more information about an error, try `rustc --explain E0277`.
==============