{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"Err(self.tcx.dcx().span_err(span,"}]}
        Err(self.tcx.dcx().span_err(span, "reached pattern complexity limit"))
        let span = self.whole_match_span.unwrap_or(self.scrut_span);
    }