ices/96259.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#96259

#[derive(Print)]
struct Foo<#[cfg] A, B> {
    third: [u8; {
        #[cfg] let a =      #[cfg] u8, #[] bool,

#[derive(P]struct o<#[cfg]B>{t:[0;{#[cfg]let 0=#[cfg]0,

=== stdout ===
=== stderr ===
error: mismatched closing delimiter: `]`
 --> /home/runner/work/glacier/glacier/ices/96259.rs:6:9
  |
6 | #[derive(P]struct o<#[cfg]B>{t:[0;{#[cfg]let 0=#[cfg]0,
  |  -      ^ ^ mismatched closing delimiter
  |  |      |
  |  |      unclosed delimiter
  |  closing delimiter possibly meant for this

error: this file contains an unclosed delimiter
 --> /home/runner/work/glacier/glacier/ices/96259.rs:6:57
  |
2 | struct Foo<#[cfg] A, B> {
  |                         - unclosed delimiter
3 |     third: [u8; {
  |            -    - unclosed delimiter
  |            |
  |            unclosed delimiter
...
6 | #[derive(P]struct o<#[cfg]B>{t:[0;{#[cfg]let 0=#[cfg]0,
  |           -                 -  -  - unclosed delimiter  ^
  |           |                 |  |
  |           |                 |  unclosed delimiter
  |           |                 unclosed delimiter
  |           missing open `[` for this delimiter

error: aborting due to 2 previous errors

==============