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//@ check-pass
// We try to prove `T::Rigid: Into<?0>` and have 2 candidates from where-clauses:
//
// - `Into<String>`
// - `Into<<T::Rigid as Elaborate>::Assoc>`
//
// This causes ambiguity unless we normalize the alias in the second candidate
// to detect that they actually result in the same constraints.
trait Trait {
type Rigid: Elaborate<Assoc = String> + Into<String>;
}
trait Elaborate: Into<Self::Assoc> {
type Assoc;
}
fn impls<T: Into<U>, U>(_: T) {}
fn test<P: Trait>(rigid: P::Rigid) {
impls(rigid);
}
fn main() {}
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