ices/78561.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#78561

#![feature(type_alias_impl_trait, member_constraints)]

pub trait Trait {
    type A;

    fn f() -> Self::A;
}

pub trait Tr2<'a, 'b> {}

pub struct A<T>(T);
pub trait Tr {
    type B;
}

impl<'a, 'b, T: Tr<B = dyn Tr2<'a, 'b>>> Trait for A<T> {
    type A = impl core::fmt::Debug;

    fn f() -> Self::A {}
}

=== stdout ===
=== stderr ===
error[E0601]: `main` function not found in crate `78561`
  --> /home/runner/work/glacier/glacier/ices/78561.rs:1:1
   |
1  | / #![feature(type_alias_impl_trait, member_constraints)]
2  | |
3  | | pub trait Trait {
4  | |     type A;
...  |
19 | |     fn f() -> Self::A {}
20 | | }
   | |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/78561.rs`

error: aborting due to previous error

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