ices/81199.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#81199

union PtrRepr<T: ?Sized> {
    const_ptr: *const T,
    mut_ptr: *mut T,
    components: <T as Pointee>::Metadata
}

pub trait Pointee {
    type Metadata;
}

=== stdout ===
=== stderr ===
error[E0601]: `main` function not found in crate `81199`
 --> /home/runner/work/glacier/glacier/ices/81199.rs:1:1
  |
1 | / union PtrRepr<T: ?Sized> {
2 | |     const_ptr: *const T,
3 | |     mut_ptr: *mut T,
4 | |     components: <T as Pointee>::Metadata
... |
8 | |     type Metadata;
9 | | }
  | |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/81199.rs`

error[E0277]: the trait bound `T: Pointee` is not satisfied
 --> /home/runner/work/glacier/glacier/ices/81199.rs:4:17
  |
4 |     components: <T as Pointee>::Metadata
  |                 ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Pointee` is not implemented for `T`
  |
help: consider further restricting this bound
  |
1 | union PtrRepr<T: ?Sized + Pointee> {
  |                         +++++++++

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0277, E0601.
For more information about an error, try `rustc --explain E0277`.
==============