error[E0308]: mismatched types
  --> $DIR/feature-gate-ref_pat_everywhere.rs:2:22
   |
LL |     if let Some(Some(&x)) = &Some(&Some(0)) {
   |                      ^^     --------------- this expression has type `&Option<&Option<{integer}>>`
   |                      |
   |                      expected integer, found `&_`
   |
   = note:   expected type `{integer}`
           found reference `&_`
help: consider removing `&` from the pattern
   |
LL |     if let Some(Some(x)) = &Some(&Some(0)) {
   |                      ~

error[E0308]: mismatched types
  --> $DIR/feature-gate-ref_pat_everywhere.rs:6:17
   |
LL |     if let Some(&Some(x)) = &Some(Some(0)) {
   |                 ^^^^^^^^    -------------- this expression has type `&Option<Option<{integer}>>`
   |                 |
   |                 expected `Option<{integer}>`, found `&_`
   |
   = note:   expected enum `Option<{integer}>`
           found reference `&_`

error[E0308]: mismatched types
  --> $DIR/feature-gate-ref_pat_everywhere.rs:10:22
   |
LL |     if let Some(Some(&mut x)) = &mut Some(&mut Some(0)) {
   |                      ^^^^^^     ----------------------- this expression has type `&mut Option<&mut Option<{integer}>>`
   |                      |
   |                      expected integer, found `&mut _`
   |
   = note:           expected type `{integer}`
           found mutable reference `&mut _`
note: to declare a mutable binding use: `mut x`
  --> $DIR/feature-gate-ref_pat_everywhere.rs:10:22
   |
LL |     if let Some(Some(&mut x)) = &mut Some(&mut Some(0)) {
   |                      ^^^^^^
help: consider removing `&mut` from the pattern
   |
LL |     if let Some(Some(x)) = &mut Some(&mut Some(0)) {
   |                      ~

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0308`.