{"ast_node_type":"other","tokens":[{"end":141,"kind":"keyword","start":0,"text":"lint.span_label(pat.span,"}]}
            lint.span_label(pat.span, format!("field{} {} not listed", rustc_errors::pluralize!(unmentioned_fields.len()), joined_patterns));
            lint.primary_message("some fields are not explicitly listed");
            lint.help(