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//@ compile-flags: -Znext-solver=coherence
//@ check-pass
// A regression test for #124791. Computing ambiguity causes
// for the overlap of the `ToString` impls caused an ICE.
#![crate_type = "lib"]
#![feature(min_specialization)]
trait Display {}
trait ToOwned {
type Owned;
}
impl<T> ToOwned for T {
type Owned = T;
}
struct Cow<B: ?Sized>(B);
impl<B: ?Sized> Display for Cow<B>
where
B: ToOwned,
B::Owned: Display,
{
}
impl Display for () {}
trait ToString {
fn to_string();
}
impl<T: Display + ?Sized> ToString for T {
default fn to_string() {}
}
impl ToString for Cow<str> {
fn to_string() {}
}
impl ToOwned for str {
type Owned = ();
}
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