error[E0004]: non-exhaustive patterns: `_` not covered | |
--> $DIR/issue-3601.rs:30:44 | |
| | |
LL | box NodeKind::Element(ed) => match ed.kind { | |
| ^^^^^^^ pattern `_` not covered | |
| | |
= help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0004`. |