ices/82438.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#82438

fn main() {
    let inner;
    let outer = || {
        inner = || {};
        inner();
    };
    outer();
}

=== stdout ===
=== stderr ===
error[E0594]: cannot assign to `inner`, as it is not declared as mutable
 --> /home/runner/work/glacier/glacier/ices/82438.rs:4:9
  |
2 |     let inner;
  |         ----- help: consider changing this to be mutable: `mut inner`
3 |     let outer = || {
4 |         inner = || {};
  |         ^^^^^^^^^^^^^ cannot assign

error[E0381]: borrow of possibly-uninitialized variable: `inner`
 --> /home/runner/work/glacier/glacier/ices/82438.rs:3:17
  |
3 |     let outer = || {
  |                 ^^ use of possibly-uninitialized `inner`
4 |         inner = || {};
  |         ----- borrow occurs due to use in closure

error[E0596]: cannot borrow `outer` as mutable, as it is not declared as mutable
 --> /home/runner/work/glacier/glacier/ices/82438.rs:7:5
  |
3 |     let outer = || {
  |         ----- help: consider changing this to be mutable: `mut outer`
4 |         inner = || {};
  |         ----- calling `outer` requires mutable binding due to mutable borrow of `inner`
...
7 |     outer();
  |     ^^^^^ cannot borrow as mutable

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0381, E0594, E0596.
For more information about an error, try `rustc --explain E0381`.
==============