log error

src/main.rs

@@ -27,7 +27,14 @@ pub fn main() -> Result<(), Box<dyn std::error::Error>> {
         r.store(false, Ordering::SeqCst);
     }).expect("Error setting Ctrl-C handler");
     
-    let mut rs = RedisCtrl::new()?;
+    let mut rs = match RedisCtrl::new() {
+	Ok(rs) => rs,
+	Err(err) => {
+	    println!("Unable to connect to redis: {:?}", err);
+	    return Err(err)
+	}
+    };
+
     
     let controller = NativeHeliosDacController::new()?;
     let devices = controller.list_devices()?;