error[E0507]: cannot move out of borrowed content
  --> $DIR/borrowck-issue-2657-2.rs:17:18
   |
LL |         let _b = *y; //~ ERROR cannot move out
   |                  ^^
   |                  |
   |                  cannot move out of borrowed content
   |                  help: consider removing the `*`: `y`

error[E0507]: cannot move out of `*y` which is behind a `&` reference
  --> $DIR/borrowck-issue-2657-2.rs:17:18
   |
LL |       Some(ref y) => {
   |            ----- help: consider changing this to be a mutable reference: `ref mut y`
LL |         let _b = *y; //~ ERROR cannot move out
   |                  ^^
   |                  |
   |                  cannot move out of `*y` which is behind a `&` reference
   |                  `y` is a `&` reference, so the data it refers to cannot be moved

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0507`.