{"ast_node_type":"other","tokens":[{"end":110,"kind":"keyword","start":0,"text":"err.note(\"in"}]}
            err.note("in the 2018 edition `try` is a reserved keyword, and the `try!()` macro is deprecated");
            let mut err = self.dcx().struct_span_err(lo.to(hi), "use of deprecated `try` macro");
            let prefix = if is_empty { "" } else { "alternatively, " };