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//@ compile-flags: -Znext-solver=coherence
//@ check-pass
// A regression test for trait-system-refactor-initiative#70.
trait Trait {
type Assoc;
}
struct W<T: ?Sized>(*mut T);
impl<T: ?Sized> Trait for W<W<T>>
where
W<T>: Trait,
{
type Assoc = ();
}
trait NoOverlap {}
impl<T: Trait<Assoc = u32>> NoOverlap for T {}
// `Projection(<W<_> as Trait>::Assoc, u32)` should result in error even
// though applying the impl results in overflow. This is necessary to match
// the behavior of the old solver.
impl<T: ?Sized> NoOverlap for W<T> {}
fn main() {}
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