ices/68656.sh: fixed with errors

[github-actions]

Issue: rust-lang/rust#68656

#!/bin/bash

rustc -C debuginfo=2 - << END
#![feature(generic_associated_types)]

trait UnsafeCopy<T: Copy>  {
    type Item<'a>: std::ops::Deref<Target = T>;

    fn bug<'a>(item: &Self::Item<'a>) -> () {
        let x: T = **item;
    }
}

impl <T: Copy> UnsafeCopy<T> for T {
    type Item<'a> = T;
}

fn main() {
    <&'static str>::bug(&"");
}

END

=== stdout ===
=== stderr ===
warning: the feature `generic_associated_types` is incomplete and may not be safe to use and/or cause compiler crashes
 --> <anon>:1:12
  |
1 | #![feature(generic_associated_types)]
  |            ^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(incomplete_features)]` on by default
  = note: see issue #44265 <https://github.com/rust-lang/rust/issues/44265> for more information

error[E0277]: the trait bound `T: std::ops::Deref` is not satisfied
  --> <anon>:12:5
   |
4  |     type Item<'a>: std::ops::Deref<Target = T>;
   |     ------------------------------------------- required by `UnsafeCopy::Item`
...
12 |     type Item<'a> = T;
   |     ^^^^^^^^^^^^^^^^^^ the trait `std::ops::Deref` is not implemented for `T`
   |
help: consider further restricting this bound
   |
11 | impl <T: Copy + std::ops::Deref> UnsafeCopy<T> for T {
   |               ^^^^^^^^^^^^^^^^^

error: aborting due to previous error; 1 warning emitted

For more information about this error, try `rustc --explain E0277`.
==============