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//@ check-pass
//@ revisions: ai ia ii
//@ compile-flags: -Znext-solver=coherence
// Regression test for nalgebra hang <https://github.com/rust-lang/rust/issues/130056>.
#![feature(lazy_type_alias)]
#![allow(incomplete_features)]
type Id<T: ?Sized> = T;
trait NotImplemented {}
struct W<'a, T: ?Sized, U: ?Sized>(&'a (), *const T, *const U);
trait Trait {
type Assoc: ?Sized;
}
impl<'a, T: ?Sized + Trait> Trait for W<'a, T, T> {
#[cfg(ai)]
type Assoc = W<'a, T::Assoc, Id<T::Assoc>>;
#[cfg(ia)]
type Assoc = W<'a, Id<T::Assoc>, T::Assoc>;
#[cfg(ii)]
type Assoc = W<'a, Id<T::Assoc>, Id<T::Assoc>>;
}
trait Overlap<T: ?Sized> {}
impl<'a, T: ?Sized> Overlap<T> for W<'a, T, T> {}
impl<T: ?Sized + Trait + NotImplemented> Overlap<T::Assoc> for T {}
fn main() {}
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