ices/88643.rs: fixed with errors

=== stdout ===
=== stderr ===
error[E0121]: the placeholder `_` is not allowed within types on item signatures for static items
  --> /home/runner/work/glacier/glacier/ices/88643.rs:13:64
   |
13 | static CALLBACKS: HashMap<*const dyn WidgetExt, dyn FnMut(&mut _) + 'static> = HashMap::new();
   |                                                                ^ not allowed in type signatures

error: aborting due to previous error

For more information about this error, try `rustc --explain E0121`.
==============