ices/87558.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#87558

struct ErrorKind;
struct Error(ErrorKind);
impl Fn(&isize) for Error {
    fn from() {}
}

=== stdout ===
=== stderr ===
error[E0407]: method `from` is not a member of trait `Fn`
 --> /home/runner/work/glacier/glacier/ices/87558.rs:4:5
  |
4 |     fn from() {}
  |     ^^^^^^^^^^^^ not a member of trait `Fn`

error[E0601]: `main` function not found in crate `87558`
 --> /home/runner/work/glacier/glacier/ices/87558.rs:1:1
  |
1 | / struct ErrorKind;
2 | | struct Error(ErrorKind);
3 | | impl Fn(&isize) for Error {
4 | |     fn from() {}
5 | | }
  | |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/87558.rs`

error[E0229]: associated type bindings are not allowed here
 --> /home/runner/work/glacier/glacier/ices/87558.rs:3:6
  |
3 | impl Fn(&isize) for Error {
  |      ^^^^^^^^^^ associated type not allowed here

error[E0183]: manual implementations of `Fn` are experimental
 --> /home/runner/work/glacier/glacier/ices/87558.rs:3:1
  |
3 | impl Fn(&isize) for Error {
  | ^^^^^^^^^^^^^^^^^^^^^^^^^ manual implementations of `Fn` are experimental
  |
  = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0183, E0229, E0407, E0601.
For more information about an error, try `rustc --explain E0183`.
==============

[Alexendoo]

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