error[E0608]: cannot index into a value of type `Foo`
  --> $DIR/slice-2.rs:17:6
   |
LL |     &x[..]; //~ ERROR cannot index into a value of type `Foo`
   |      ^^^^^

error[E0608]: cannot index into a value of type `Foo`
  --> $DIR/slice-2.rs:18:6
   |
LL |     &x[Foo..]; //~ ERROR cannot index into a value of type `Foo`
   |      ^^^^^^^^

error[E0608]: cannot index into a value of type `Foo`
  --> $DIR/slice-2.rs:19:6
   |
LL |     &x[..Foo]; //~ ERROR cannot index into a value of type `Foo`
   |      ^^^^^^^^

error[E0608]: cannot index into a value of type `Foo`
  --> $DIR/slice-2.rs:20:6
   |
LL |     &x[Foo..Foo]; //~ ERROR cannot index into a value of type `Foo`
   |      ^^^^^^^^^^^

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0608`.