error[E0228]: the lifetime bound for this object type cannot be deduced from context; please supply an explicit bound --> $DIR/object-lifetime-default-dyn-binding-nonstatic3.rs:16:36 | LL | fn bar(x: &str) -> &dyn Foo { &() } | ^^^^^^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0228`.