{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"}"}]}
        } else if self.tcx.is_lang_item(def_id, LangItem::PanicFmt) {
            return Err(ConstEvalErrKind::Panic { msg, file, line, col }).into();
            // For panic_fmt, call const_panic_fmt instead.