ices/82455.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#82455

fn map<T>(_: fn() -> Option<&'static T>) -> Option<T> {
    None
}

fn value() -> Option<&'static _> {
    Option::<&'static u8>::None
}

const _: Option<_> = {
    let _: Option<_> = map(value);
};

=== stdout ===
=== stderr ===
error[E0601]: `main` function not found in crate `82455`
  --> /home/runner/work/glacier/glacier/ices/82455.rs:1:1
   |
1  | / fn map<T>(_: fn() -> Option<&'static T>) -> Option<T> {
2  | |     None
3  | | }
4  | |
...  |
10 | |     let _: Option<_> = map(value);
11 | | };
   | |__^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/82455.rs`

error[E0121]: the type placeholder `_` is not allowed within types on item signatures
 --> /home/runner/work/glacier/glacier/ices/82455.rs:5:31
  |
5 | fn value() -> Option<&'static _> {
  |               ----------------^-
  |               |               |
  |               |               not allowed in type signatures
  |               help: replace with the correct return type: `Option<&'static u8>`

error[E0121]: the type placeholder `_` is not allowed within types on item signatures
 --> /home/runner/work/glacier/glacier/ices/82455.rs:9:10
  |
9 | const _: Option<_> = {
  |          ^^^^^^^^^ not allowed in type signatures

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0121, E0601.
For more information about an error, try `rustc --explain E0121`.
==============