error[E0004]: non-exhaustive patterns: `Err(_)` not covered
  --> $DIR/uninhabited-matches-feature-gated.rs:6:19
   |
LL |     let _ = match x {
   |                   ^ pattern `Err(_)` not covered
   |
note: `Result<u32, &Void>` defined here
  --> $SRC_DIR/core/src/result.rs:LL:COL
  ::: $SRC_DIR/core/src/result.rs:LL:COL
   |
   = note: not covered
   = note: the matched value is of type `Result<u32, &Void>`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
   |
LL ~         Ok(n) => n,
LL ~         Err(_) => todo!(),
   |

error[E0004]: non-exhaustive patterns: type `&Void` is non-empty
  --> $DIR/uninhabited-matches-feature-gated.rs:15:19
   |
LL |     let _ = match x {};
   |                   ^
   |
note: `Void` defined here
  --> $DIR/uninhabited-matches-feature-gated.rs:2:6
   |
LL | enum Void {}
   |      ^^^^
   = note: the matched value is of type `&Void`
   = note: references are always considered inhabited
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown
   |
LL ~     let _ = match x {
LL +         _ => todo!(),
LL ~     };
   |

error[E0004]: non-exhaustive patterns: `&[_, ..]` not covered
  --> $DIR/uninhabited-matches-feature-gated.rs:24:19
   |
LL |     let _ = match x {
   |                   ^ pattern `&[_, ..]` not covered
   |
   = note: the matched value is of type `&[Void]`
   = note: `Void` is uninhabited but is not being matched by value, so a wildcard `_` is required
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
   |
LL ~         &[] => (),
LL ~         &[_, ..] => todo!(),
   |

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0004`.