ices/88212.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#88212

#![feature(unsized_locals)]

trait Example {}

struct Foo();

impl Example for Foo {}

fn example() -> Box<dyn Example> {
    Box::new(Foo())
}

fn main() {
    let x: dyn Example = *example();
    (move || {  // ERROR
        let _y = x;
    })();
}

=== stdout ===
=== stderr ===
warning: the feature `unsized_locals` is incomplete and may not be safe to use and/or cause compiler crashes
 --> /home/runner/work/glacier/glacier/ices/88212.rs:1:12
  |
1 | #![feature(unsized_locals)]
  |            ^^^^^^^^^^^^^^
  |
  = note: see issue #48055 <https://github.com/rust-lang/rust/issues/48055> for more information
  = note: `#[warn(incomplete_features)]` on by default

error[E0277]: the size for values of type `dyn Example` cannot be known at compilation time
  --> /home/runner/work/glacier/glacier/ices/88212.rs:16:18
   |
15 |     (move || {  // ERROR
   |           -- this closure captures all values by move
16 |         let _y = x;
   |                  ^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `dyn Example`
   = note: all values captured by value by a closure must have a statically known size

error: aborting due to previous error; 1 warning emitted

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