...

src/server.rs

@@ -97,7 +97,15 @@ impl Server {
                 // Check if this is a QUIT command before processing
                 let is_quit = matches!(cmd, Cmd::Quit);
 
-                let res = cmd.run(self).await.unwrap_or(Protocol::err("unknown cmd from server"));
+                let res = match cmd.run(self).await {
+                    Ok(p) => p,
+                    Err(e) => {
+                        if self.option.debug {
+                            eprintln!("[run error] {:?}", e);
+                        }
+                        Protocol::err(&format!("ERR {}", e.0))
+                    }
+                };
                 
                 if self.option.debug {
                     println!("\x1b[34;1mqueued cmd {:?}\x1b[0m", self.queued_cmd);