ices/94429.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#94429

#![feature(type_alias_impl_trait, generator_trait, generators)]
use std::ops::Generator;

trait Runnable {
    type Gen: Generator<Yield = (), Return = ()>;

    fn run(&mut self) -> Self::Gen;
}

struct Implementor {}

impl Runnable for Implementor {
    type Gen = impl Generator<Yield = (), Return = ()>;

    fn run(&mut self) -> Self::Gen {
        move || {
            // This line causes the ICE;
            // the same error occurs if the return type is wrong (e.g. `return 1`)
            yield 1;
        }
    }
}

=== stdout ===
=== stderr ===
error[E0601]: `main` function not found in crate `94429`
  --> /home/runner/work/glacier/glacier/ices/94429.rs:22:2
   |
22 | }
   |  ^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/94429.rs`

error[E0271]: type mismatch resolving `<[generator@/home/runner/work/glacier/glacier/ices/94429.rs:16:9: 20:10] as Generator>::Yield == ()`
  --> /home/runner/work/glacier/glacier/ices/94429.rs:16:9
   |
16 | /         move || {
17 | |             // This line causes the ICE;
18 | |             // the same error occurs if the return type is wrong (e.g. `return 1`)
19 | |             yield 1;
20 | |         }
   | |_________^ expected integer, found `()`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0271, E0601.
For more information about an error, try `rustc --explain E0271`.
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