[Question] RPCConvertValues() call error #17644

[Question]

Hi, I'd like to call RPC programmatically, instead of using bitcoin-cli. when I call the function RPCConvertValues() , it always raise error

RPCConvertValues() is defined here : https://github.com/bitcoin/bitcoin/blob/cab94cc07489f704c4b95171b23be0e8025df794/src/rpc/client.cpp#L221

test code are here : https://github.com/bitcoin/bitcoin/blob/46fc4d1a24c88e797d6080336e3828e45e39c3fd/src/test/rpc_tests.cpp#L319 https://github.com/bitcoin/bitcoin/blob/7967104aee055476107dc17265cefc4ae4e75378/src/bitcoin-cli.cpp#L293 https://github.com/bitcoin/bitcoin/blob/eb292af309aa57f3d7998b01307dd4cb91702908/src/qt/rpcconsole.cpp#L302

My test code :

#include <iostream>
#include <rpc/blockchain.cpp>
#include <rpc/request.h>
#include <rpc/client.h>
#include <rpc/util.h>
#include <univalue/include/univalue.h>
#include <interfaces/node.h>

namespace experimental {
    void wait(int seconds) { boost::this_thread::sleep(boost::posix_time::seconds(seconds)); }

    void rpcgetblockhash() {
        wait(30);
        std::cout << "getblockhash RPC CALL!!" << std::endl;
        
        interfaces::Node* node;
        UniValue params = RPCConvertValues("getblockhash", {"0"}); // occurred error 
    }
}

Occurred error : <img width="1375" alt="스크린샷 2019-12-02 오전 1 11 05" src="https://user-images.githubusercontent.com/12508269/69916639-b576b500-14a0-11ea-8dc8-a4cad816e31c.png">

I think that both are same between my function call form and function form of specified link above. I don't know why I'm getting error. can you give some guide?

This issue tracker if for technical issues related only to Bitcoin Core, and should not be used for general programming questions / support. You might want to try the Bitcoin Stack Exchange instead.

I'm sorry. I didn't know about policy.

CBlockIndex* pblockindex = ::ChainActive()[0]; UniValue blockhash = pblockindex->GetBlockHash().GetHex(); std::cout << blockhash.get_str() << std::endl;

I found some other method to solve after analyzing code flow and leave it above for some people that may face to similar problem.

I think that compatibility between version of boost library and Mac OS may be correlated, especially when pass vector parameter into function.