ices/61747.rs: fixed with no errors

[github-actions]

Issue: rust-lang/rust#61747

#![feature(const_generics)]

struct Const<const N: usize>;

impl<const C: usize> Const<{C}> {
    fn successor() -> Const<{C + 1}> {
        Const
    }
}

fn main() {
    Const::<1>::successor();
}

=== stdout ===
=== stderr ===
warning: the feature `const_generics` is incomplete and may cause the compiler to crash
 --> /home/runner/work/glacier/glacier/ices/61747.rs:1:12
  |
1 | #![feature(const_generics)]
  |            ^^^^^^^^^^^^^^
  |
  = note: `#[warn(incomplete_features)]` on by default

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