ices/75707.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#75707

pub trait Callback { fn cb(); }

pub trait Processing {
    type Call:Callback;
}

fn f<P:Processing+?Sized>() {
    P::Call::cb();
}

fn main() {
    struct MyCall;
    f::<dyn Processing<Call=MyCall>>();
}

=== stdout ===
=== stderr ===
error[E0277]: the trait bound `MyCall: Callback` is not satisfied
  --> /home/runner/work/glacier/glacier/ices/75707.rs:13:5
   |
7  | fn f<P:Processing+?Sized>() {
   |        ---------- required by this bound in `f`
...
13 |     f::<dyn Processing<Call=MyCall>>();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Callback` is not implemented for `MyCall`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.
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