error[E0004]: non-exhaustive patterns: `Enum::B` not covered --> $DIR/issue-94866.rs:10:11 | LL | match Enum::A { | ^^^^^^^ pattern `Enum::B` not covered | note: `Enum` defined here --> $DIR/issue-94866.rs:7:6 | LL | enum Enum { A, B } | ^^^^ - not covered = note: the matched value is of type `Enum` 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 ~ Enum::A => m!(), LL + Enum::B => todo!() | error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0004`.