1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
// edition:2018 struct Xyz { a: u64, } trait Foo {} impl Xyz { async fn do_sth<'a>( &'a self, foo: &dyn Foo ) -> &dyn Foo { //~^ ERROR explicit lifetime required in the type of `foo` [E0621] foo } } fn main() {}