| error[E0004]: non-exhaustive patterns: `(None, None)` not covered | |
| --> $DIR/issue-2111.rs:12:9 | |
| | | |
| LL | match (a,b) { | |
| | ^^^^^ pattern `(None, None)` not covered | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0004`. |