error[E0508]: cannot move out of type `[Foo]`, a non-copy slice
  --> $DIR/borrowck-move-out-of-vec-tail.rs:29:19
   |
LL |             match tail {
   |                   ^^^^ cannot move out of here
LL |                 &[Foo { string: a },
   |                                 - data moved here
...
LL |                   Foo { string: b }] => {
   |                                 - ... and here
help: to prevent move, use ref or ref mut
   |
LL |                 &[Foo { string: ref a },
LL |                 //~^ ERROR cannot move out of type `[Foo]`
LL |                 //~| cannot move out
LL |                 //~| to prevent move
LL |                   Foo { string: ref b }] => {
   |

error: aborting due to previous error

For more information about this error, try `rustc --explain E0508`.