Handle robot disconnects more cleanly

src/robot/robot_manager.rs

@@ -92,7 +92,20 @@ impl RobotManager {
                 return Err(Error::ConnectionClosed(*id));
             }
 
-            let resp = recv_raas_msg(&mut connector.stream).await?;
+            let ret = recv_raas_msg(&mut connector.stream).await;
+
+            let resp = match ret {
+                Ok(r) => r,
+                Err(err) => {
+                    error!(
+                        "Got '{}' receiving message to Robot Connector id={}, closing connection",
+                        err, id
+                    );
+
+                    return Err(Error::ConnectionClosed(*id));
+                }
+            };
+
             info!("Got response from id={}", id);
             self.send_resp(resp).await?;
         } else {