error: use `as_ref()` instead
  --> $DIR/match_as_ref.rs:6:33
   |
LL |       let borrowed: Option<&()> = match owned {
   |  _________________________________^
LL | |         None => None,
LL | |         Some(ref v) => Some(v),
LL | |     };
   | |_____^ help: try: `owned.as_ref()`
   |
   = note: `-D clippy::match-as-ref` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::match_as_ref)]`

error: use `as_mut()` instead
  --> $DIR/match_as_ref.rs:12:39
   |
LL |       let borrow_mut: Option<&mut ()> = match mut_owned {
   |  _______________________________________^
LL | |         None => None,
LL | |         Some(ref mut v) => Some(v),
LL | |     };
   | |_____^ help: try: `mut_owned.as_mut()`

error: use `as_ref()` instead
  --> $DIR/match_as_ref.rs:30:13
   |
LL | /             match self.source {
LL | |                 Some(ref s) => Some(s),
LL | |                 None => None,
LL | |             }
   | |_____________^ help: try: `self.source.as_ref().map(|x| x as _)`

error: aborting due to 3 previous errors