Debug display of openssl error

gistfile1.txt

DEBUG - Failure(
    MidHandshakeSslStream {
        stream: SslStream {
            stream: TcpStream {
                addr: V4(
                    10.67.61.79:55726
                ),
                peer: V4(
                    10.81.171.162:8085
                ),
                fd: 3
            },
            ssl: Ssl {
                state: "error",
                verify_result: X509VerifyResult {
                    code: 20,
                    error: "unable to get local issuer certificate"
                }
            }
        },
        error: Error {
            code: ErrorCode(
                1
            ),
            cause: Some(
                Ssl(
                    ErrorStack(
                        [
                            Error {
                                code: 336134278,
                                library: "SSL routines",
                                function: "ssl3_get_server_certificate",
                                reason: "certificate verify failed",
                                file: "s3_clnt.c",
                                line: 1269
                            }
                        ]
                    )
                )
            )
        }
    }
)