ices/80561.rs: fixed with no errors (#659)

=== stdout ===
=== stderr ===
warning: the feature `const_generics` is incomplete and may not be safe to use and/or cause compiler crashes
 --> /home/runner/work/glacier/glacier/ices/80561.rs:1:12
  |
1 | #![feature(const_generics)]
  |            ^^^^^^^^^^^^^^
  |
  = note: `#[warn(incomplete_features)]` on by default
  = note: see issue #44580 <rust-lang/rust#44580> for more information

warning: the feature `const_evaluatable_checked` is incomplete and may not be safe to use and/or cause compiler crashes
 --> /home/runner/work/glacier/glacier/ices/80561.rs:2:12
  |
2 | #![feature(const_evaluatable_checked)]
  |            ^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #76560 <rust-lang/rust#76560> for more information

warning: 2 warnings emitted

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

Co-authored-by: rustbot <[email protected]>