Parser fails to parse complex address types

[saeed-zil]

Contract Code:

contract AllByStrVariants
  (
    bystr : ByStr,
    bystr32 : ByStr32,
    raw_address: ByStr20,
    library_address : ByStr20 with library end,
    contract_address : ByStr20 with contract end,
    detailed_contract_address :
      ByStr20 with contract
        field allowances : Map ByStr20 (Map ByStr20 Uint128),
        field balances : Map ByStr20 Uint128,
        field total_supply : Uint128
        end,
    complex_contract_address: ByStr20 with contract
      field implementation: ByStr20 with contract
        field services: Map String ByStr20,
        field utility: Map String Uint128 end,
      field dns: Map String ByStr20,
      field guardians: Map String ByStr20 with contract field verification_methods: Map String ByStr33 end end

It fails to parse complex_contract_address