{"ast_node_type":"other","tokens":[{"end":28,"kind":"keyword","start":0,"text":"Some(local)"}]}
            Some(local) => {
        let (from_arg, local_decl) = match err_place.as_local() {
                (self.body.local_kind(local) == LocalKind::Arg, Some(&self.body.local_decls[local]))