ices/83182.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#83182

use std::mem;
struct MyStr(str);
const MYSTR_NO_INIT: &MyStr = unsafe { mem::transmute::<&[_], _>(&[&()]) };

fn main() {}

=== stdout ===
=== stderr ===
warning: struct is never constructed: `MyStr`
 --> /home/runner/work/glacier/glacier/ices/83182.rs:2:8
  |
2 | struct MyStr(str);
  |        ^^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: constant is never used: `MYSTR_NO_INIT`
 --> /home/runner/work/glacier/glacier/ices/83182.rs:3:1
  |
3 | const MYSTR_NO_INIT: &MyStr = unsafe { mem::transmute::<&[_], _>(&[&()]) };
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0080]: it is undefined behavior to use this value
 --> /home/runner/work/glacier/glacier/ices/83182.rs:3:1
  |
3 | const MYSTR_NO_INIT: &MyStr = unsafe { mem::transmute::<&[_], _>(&[&()]) };
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a pointer in `str` at .<deref>.0
  |
  = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
  = note: the raw bytes of the constant (size: 16, align: 8) {
              ╾───────alloc3────────╼ 01 00 00 00 00 00 00 00 │ ╾──────╼........
          }

error: aborting due to previous error; 2 warnings emitted

For more information about this error, try `rustc --explain E0080`.
==============