# Pastebin c0cYYw9f
/Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:24:45: receiver type is not a subtype of target type
    | let e: Error val => dmap("error") = e.to_jsonobject()
                                            ^
    Info:
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:24:41: receiver type: Error val
        | let e: Error val => dmap("error") = e.to_jsonobject()
                                            ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/error.pony:21:3: target type: Error ref
      fun ref to_jsonobject(): JsonObject =>
      ^
    /Users/kevin/Code/Pony/json-rpc-pony/jsonrpc/response.pony:24:12: Error val is not a subtype of Error ref: val is not a subcap of ref
        | let e: Error val => dmap("error") = e.to_jsonobject()