{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"self.dcx().emit_fatal(crate::error::RequiresLangItem"}]}
            self.dcx().emit_fatal(crate::error::RequiresLangItem { span, name: lang_item.name() });
        self.lang_items().get(lang_item).unwrap_or_else(|| {
        })