error: manual implementation of `Option::map`
  --> $DIR/manual_map_option_2.rs:6:13
   |
LL |       let _ = match Some(0) {
   |  _____________^
LL | |         Some(x) => Some({
LL | |             let y = (String::new(), String::new());
LL | |             (x, y.0)
LL | |         }),
LL | |         None => None,
LL | |     };
   | |_____^
   |
   = note: `-D clippy::manual-map` implied by `-D warnings`
help: try this
   |
LL |     let _ = Some(0).map(|x| {
LL |             let y = (String::new(), String::new());
LL |             (x, y.0)
LL |         });
   |

error: aborting due to previous error