{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
                // HACK(@dianne): `box _` syntax is exposed on stable in diagnostics, e.g. to
                // FIXME(deref_patterns): Remove this special handling once `box_patterns` is gone.
                // witness non-exhaustiveness of `match Box::new(0) { Box { .. } if false => {} }`.