A Half-Built Object Has No Destructor

1#include <iostream>
2#include <stdexcept>
3 
4class Log {
5public:
6    Log() { std::cout << "log opened\n"; }
7    ~Log() { std::cout << "log closed\n"; }
8};
9 
10class Server {
11    Log m_log;
12public:
13    explicit Server(int port) {
14        std::cout << "starting on port " << port << "\n";
15        if (port < 1024) {
16            throw std::invalid_argument("port is reserved");
17        }
18        std::cout << "server ready\n";
19    }
20    ~Server() { std::cout << "server stopped\n"; }
21};
22 
23int main() {
24    try {
25        Server good(8080);
26        std::cout << "using good server\n";
27    } catch (const std::invalid_argument& e) {
28        std::cout << "error: " << e.what() << "\n";
29    }
30    try {
31        Server bad(80);
32        std::cout << "using bad server\n";
33    } catch (const std::invalid_argument& e) {
34        std::cout << "error: " << e.what() << "\n";
35    }
36    return 0;
37}