error[E0004]: non-exhaustive patterns: `&[_, Some(_), .., None, _]` not covered --> $DIR/match-slice-patterns.rs:2:11 | LL | match list { | ^^^^ pattern `&[_, Some(_), .., None, _]` not covered | = note: the matched value is of type `&[Option<()>]` help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown | LL ~ &[.., Some(_), _] => {}, LL ~ &[_, Some(_), .., None, _] => todo!(), | error: aborting due to previous error For more information about this error, try `rustc --explain E0004`.