syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if lo_expr.is_none() && hi_expr.is_none() {
context_before:     ) -> Result<PatKind<'tcx>, ErrorGuaranteed> {
context_after:             let msg = "found twice-open range pattern (`..`) outside of error recovery";