rust/src/test/ui/async-await/issues/issue-65159.rs

// Regression test for #65159. We used to ICE.
//
// edition:2018

async fn copy() -> Result<()>
//~^ ERROR this enum takes 2 type arguments but only 1 type argument was supplied
{
    Ok(())
    //~^ ERROR type annotations needed
}

fn main() { }