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// astconv uses `FreshTy(0)` as a dummy `Self` type when instanciating trait objects.
// This `FreshTy(0)` can leak into substs, causing ICEs in several places.
#![feature(trait_alias)]
pub trait SelfInput = Fn(&mut Self);
pub fn f(_f: &dyn SelfInput) {}
//~^ ERROR the trait alias `SelfInput` cannot be made into an object [E0038]
fn main() {}
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