{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"assert!(attr.has_name(sym::rustc_clean));"}]}
        assert!(attr.has_name(sym::rustc_clean));
    fn assertion_maybe(&mut self, item_id: LocalDefId, attr: &Attribute) -> Option<Assertion> {
        if !check_config(self.tcx, attr) {