syntax_data: {"ast_node_type":"variable","tokens":[{"end":52,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if let Err(err) = pat.pat_error_reported() {
context_before:     ) -> Result<&'p DeconstructedPat<'p, 'tcx>, ErrorGuaranteed> {
context_after:             self.error = Err(err);