ices/100463.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#100463

struct Foo<T> {
    inner: Vec<T>,
}

impl<T> Foo<T> {
    fn get(&self) -> impl Iterator<Item = &T> {
        self.inner.iter()
    }
}

fn main() {
    let foo: Foo<()> = Foo { inner: Vec::new() };
    let vals: Vec<_> = foo.get();
}

=== stdout ===
=== stderr ===
error[E0308]: mismatched types
  --> /home/runner/work/glacier/glacier/ices/100463.rs:13:24
   |
6  |     fn get(&self) -> impl Iterator<Item = &T> {
   |                      ------------------------ the found opaque type
...
13 |     let vals: Vec<_> = foo.get();
   |               ------   ^^^^^^^^^ expected struct `Vec`, found opaque type
   |               |
   |               expected due to this
   |
   = note:   expected struct `Vec<_>`
           found opaque type `impl Iterator<Item = &()>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.
==============