error[E0004]: non-exhaustive patterns: `None` not covered --> $DIR/suggest-adding-appropriate-missing-pattern-excluding-comments.rs:4:11 | LL | match Some(1) { | ^^^^^^^ pattern `None` not covered | note: `Option` defined here --> $SRC_DIR/core/src/option.rs:LL:COL | LL | pub enum Option { | ------------------ ... LL | 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 + None => todo!() | error: aborting due to previous error For more information about this error, try `rustc --explain E0004`.