error[E0594]: cannot assign to `self.0`, which is behind a `&` reference
  --> $DIR/suggest-ref-mut.rs:7:9
   |
LL |     fn zap(&self) {
   |            ----- help: consider changing this to be a mutable reference: `&mut self`
...
LL |         self.0 = 32;
   |         ^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be written

error[E0594]: cannot assign to `*foo`, which is behind a `&` reference
  --> $DIR/suggest-ref-mut.rs:16:5
   |
LL |     let ref foo = 16;
   |         ------- help: consider changing this to be a mutable reference: `ref mut foo`
...
LL |     *foo = 32;
   |     ^^^^^^^^^ `foo` is a `&` reference, so the data it refers to cannot be written

error[E0594]: cannot assign to `*bar`, which is behind a `&` reference
  --> $DIR/suggest-ref-mut.rs:21:9
   |
LL |     if let Some(ref bar) = Some(16) {
   |                 ------- help: consider changing this to be a mutable reference: `ref mut bar`
...
LL |         *bar = 32;
   |         ^^^^^^^^^ `bar` is a `&` reference, so the data it refers to cannot be written

error[E0594]: cannot assign to `*quo`, which is behind a `&` reference
  --> $DIR/suggest-ref-mut.rs:25:22
   |
LL |         ref quo => { *quo = 32; },
   |         -------      ^^^^^^^^^ `quo` is a `&` reference, so the data it refers to cannot be written
   |         |
   |         help: consider changing this to be a mutable reference: `ref mut quo`

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0594`.