warning: trait objects without an explicit `dyn` are deprecated --> $DIR/cap-lints-allow.rs:8:25 | LL | pub fn function(_x: Box) {} | ^^^^^^^^^ | = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! = note: for more information, see = note: requested on the command line with `--force-warn bare-trait-objects` help: if this is an object-safe trait, use `dyn` | LL | pub fn function(_x: Box) {} | +++ warning: 1 warning emitted