#cases [{output #err <mismatch type>
         select map}
        {output #err <mismatch type>
         select string}
        {output #err <mismatch type>
         select non-pair}
        {output #err <mismatch type>
         select map-pair}
        {output #err <mismatch type>
         select string-pair}
        {output #err <invalid value>
         select empty-pair}
        {output #err <invalid value>
         select null-pair}
        {output #err <invalid value>
         select short-pair}
        {output #err <invalid value>
         select long-pair}
        {output #err <mismatch type>
         select number-key}
        {output #err <mismatch type>
         select null-key}
        {output #err <mismatch type>
         select list-key}
        {output #err <invalid value>
         select later-invalid-pair}
        {output #err <arity mismatch>
         select missing}
        {output #err <arity mismatch>
         select extra}]