ices/89864.rs: fixed with no errors

=== stdout ===
=== stderr ===
warning: function is never used: `ice`
  --> /home/runner/work/glacier/glacier/ices/89864.rs:16:4
   |
16 | fn ice<T>(i: Ice<T>)
   |    ^^^
   |
   = note: `#[warn(dead_code)]` on by default

warning: 1 warning emitted

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

Author: rustbot