ices/77357.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#77357

#![feature(generic_const_exprs)]

trait MyTrait<T> {}

fn bug<'a, T>() -> &'static dyn MyTrait<[(); { |x: &'a u32| { x }; 4 }]> {
    todo!()
}

=== stdout ===
=== stderr ===
warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
 --> /home/runner/work/glacier/glacier/ices/77357.rs:1:12
  |
1 | #![feature(generic_const_exprs)]
  |            ^^^^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(incomplete_features)]` on by default
  = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information

error[E0601]: `main` function not found in crate `77357`
 --> /home/runner/work/glacier/glacier/ices/77357.rs:7:2
  |
7 | }
  |  ^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/77357.rs`

error: overly complex generic constant
 --> /home/runner/work/glacier/glacier/ices/77357.rs:5:46
  |
5 | fn bug<'a, T>() -> &'static dyn MyTrait<[(); { |x: &'a u32| { x }; 4 }]> {
  |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^ blocks are not supported in generic constant
  |
  = help: consider moving this anonymous constant into a `const` function
  = note: this operation may be supported in the future

error: aborting due to 2 previous errors; 1 warning emitted

For more information about this error, try `rustc --explain E0601`.
==============