{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
    let mut parser = unwrap_or_emit_fatal(match &sess.io.input {
fn parse_crate_attrs<'a>(sess: &'a Session) -> PResult<'a, ast::AttrVec> {
        Input::File(file) => new_parser_from_file(&sess.psess, file, None),