1 error[E0004]: non-exhaustive patterns: `(A, Some(A))`, `(A, Some(B))`, `(B, Some(B))` and 2 more not covered
2 --> $DIR/issue-72377.rs:8:11
5 | ^^^^^^ patterns `(A, Some(A))`, `(A, Some(B))`, `(B, Some(B))` and 2 more not covered
7 = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
8 = note: the matched value is of type `(X, Option<X>)`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0004`.