1 // revisions: edition2015 edition2021
2 //[edition2021]edition:2021
6 fn ice() -> impl AsRef<Fn(&())> {
7 //[edition2015]~^ ERROR: the trait bound `(): AsRef<(dyn for<'a> Fn(&'a ()) + 'static)>` is not satisfied [E0277]
8 //[edition2021]~^^ ERROR: trait objects must include the `dyn` keyword [E0782]