# Pastebin x7FTdXhZ
/Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:23:21: argument not a subtype of parameter
      dmap("error") = err      
                    ^
    Info:
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:8:13: Error ref is not a subtype of F64 val
      let err : (Error | None)
                ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:8:13: Error ref is not a subtype of I64 val
      let err : (Error | None)
                ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:8:13: Error ref is not a subtype of Bool val
      let err : (Error | None)
                ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:8:13: Error ref is not a subtype of None val
      let err : (Error | None)
                ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:8:13: Error ref is not a subtype of String val
      let err : (Error | None)
                ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:8:13: Error ref is not a subtype of JsonArray ref
      let err : (Error | None)
                ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:8:13: Error ref is not a subtype of JsonObject ref
      let err : (Error | None)
                ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:8:13: Error ref is not a subtype of any element of (F64 val | I64 val | Bool val | None val | String val | JsonArray ref | JsonObject ref)
      let err : (Error | None)
                ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:8:13: not every element of (Error ref | None val) is a subtype of (F64 val | I64 val | Bool val | None val | String val | JsonArray ref | JsonObject ref)
      let err : (Error | None)