{"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"tcx.dcx()"}]}
                    tcx.dcx()
                if let Some(dup) = set.insert(ident.name, ident.span) {
                        .emit_err(errors::FunctionNamesDuplicated { spans: vec![dup, ident.span] });