ices/68296.sh: fixed with errors

[github-actions]

Issue: rust-lang/rust#68296

#!/bin/bash

rustc -Zmir-opt-level=2 - << END
const FOO: *const u32 = { //~ ERROR any use of this value will cause an error
    let x = 42;
    &x
};

fn main() {
    let x = FOO;
}

END

=== stdout ===
=== stderr ===
warning: unused variable: `x`
 --> <anon>:7:9
  |
7 |     let x = FOO;
  |         ^ help: if this is intentional, prefix it with an underscore: `_x`
  |
  = note: `#[warn(unused_variables)]` on by default

error: untyped pointers are not allowed in constant
 --> <anon>:1:1
  |
1 | / const FOO: *const u32 = { //~ ERROR any use of this value will cause an error
2 | |     let x = 42;
3 | |     &x
4 | | };
  | |__^

error: aborting due to previous error; 1 warning emitted

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

[JohnTitor]

I think it's fixed by rust-lang/rust#71665.