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// This is a non-regression test for issue #126670 where RPITIT refinement checking encountered
// errors during resolution and ICEd.
//@ edition: 2018
pub trait Mirror {
type Assoc;
}
impl<T: ?Sized> Mirror for () {
//~^ ERROR the type parameter `T` is not constrained
type Assoc = T;
//~^ ERROR the size for values of type `T` cannot be known at compilation time
}
pub trait First {
async fn first() -> <() as Mirror>::Assoc;
}
impl First for () {
async fn first() {}
}
fn main() {}
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