fix：修正当没有找到local IP时的崩溃问题。

server/server.cpp

@@ -25,18 +25,23 @@ bool CTcpServer::start(unsigned short port)
 {
     asio::ip::tcp::resolver resolver(io_context_);
     asio::ip::tcp::resolver::query query(asio::ip::host_name(), "");
-    asio::ip::tcp::resolver::iterator it = resolver.resolve(query);
 
-    mpdebug("Here are the local IP addresses you may use.");
+    try {
-    mpdebug("===========================================");
+        auto it = resolver.resolve(query);
-    int i = 1;
+        mpdebug("Here are the local IP addresses you may use.");
-    while (it != asio::ip::tcp::resolver::iterator()) {
+        mpdebug("===========================================");
-        asio::ip::address addr = it->endpoint().address();
+        int i = 1;
-        mpinfo("({}){}", i, addr.to_string());
+        while (it != asio::ip::tcp::resolver::iterator()) {
-        ++it;
+            asio::ip::address addr = it->endpoint().address();
-        ++i;
+            mpinfo("({}){}", i, addr.to_string());
+            ++it;
+            ++i;
+        }
+        mpdebug("===========================================");
+    } catch (const std::exception& e) {
+        mpwarn("{}", e.what());
+        mpinfo("will not show local IP.");
     }
-    mpdebug("===========================================");
 
     asio::ip::tcp::endpoint endpoint(asio::ip::tcp::v4(), port);
     try {