ices/53092.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#53092

#![feature(type_alias_impl_trait)]
#![allow(dead_code)]

type Bug<T, U> = impl Fn(T) -> U + Copy;

const CONST_BUG: Bug<u8, ()> = unsafe { std::mem::transmute(|_: u8| ()) };

fn make_bug<T, U: From<T>>() -> Bug<T, U> {
    |x| x.into()
}

fn main() {
    CONST_BUG(0);
}

=== stdout ===
=== stderr ===
error[E0277]: the trait bound `U: From<T>` is not satisfied
 --> /home/runner/work/glacier/glacier/ices/53092.rs:9:5
  |
9 |     |x| x.into()
  |     ^^^^^^^^^^^^ the trait `From<T>` is not implemented for `U`
  |
note: required by a bound in `make_bug`
 --> /home/runner/work/glacier/glacier/ices/53092.rs:8:19
  |
8 | fn make_bug<T, U: From<T>>() -> Bug<T, U> {
  |                   ^^^^^^^ required by this bound in `make_bug`
help: consider restricting type parameter `U`
  |
4 | type Bug<T, U: std::convert::From<T>> = impl Fn(T) -> U + Copy;
  |              +++++++++++++++++++++++

error: aborting due to previous error

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