missing type in match arms have incompatible types diagnostic

[bjorn3]

fn main() {
    match Some(0u32) {
        Some(x) => {
            x
        },
        None => {}
    };
}

(Playground)

Errors:

   Compiling playground v0.0.1 (/playground)
error[E0308]: match arms have incompatible types
 --> src/main.rs:6:17
  |
2 | /     match Some(0u32) {
3 | |         Some(x) => {
4 | |             x
  | |             - this is found to be of type `_` <----------- this should be `u32`, removing the {} around x fixes it.
5 | |         },
6 | |         None => {}
  | |                 ^^ expected u32, found ()
7 | |     };
  | |_____- `match` arms have incompatible types
  |
  = note: expected type `u32`
             found type `()`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.
error: Could not compile `playground`.

To learn more, run the command again with --verbose.