error[E0009]: cannot bind by-move and by-ref in the same pattern
  --> $DIR/bind-by-move-neither-can-live-while-the-other-survives-3.rs:24:38
   |
LL |         double_option::some2(ref _y, _z) => { },
   |                              ------  ^^ by-move pattern here
   |                              |
   |                              both by-ref and by-move used

error: aborting due to previous error

For more information about this error, try `rustc --explain E0009`.