{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
        let mut diag = Diag::new(dcx, level, fluent::passes_no_main_function);
    fn into_diag(self, dcx: DiagCtxtHandle<'a>, level: Level) -> Diag<'a, G> {
        diag.span(DUMMY_SP);