File: coherence-projection-conflict-orphan.rs

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rustc 1.88.0%2Bdfsg1-1
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#![feature(rustc_attrs)]

// Here we expect a coherence conflict because, even though `i32` does
// not implement `Iterator`, we cannot rely on that negative reasoning
// due to the orphan rules. Therefore, `A::Item` may yet turn out to
// be `i32`.

pub trait Foo<P> { fn foo() {} }

pub trait Bar {
    type Output: 'static;
}

impl Foo<i32> for i32 { }

impl<A:Iterator> Foo<A::Item> for A { }
//~^ ERROR E0119

fn main() {}