error[E0508]: cannot move out of type `[D; 4]`, a non-copy array
  --> $DIR/move-out-of-array-1.rs:17:5
   |
LL |     a[i] //~ ERROR cannot move out of type `[D; 4]`, a non-copy array
   |     ^^^^ cannot move out of here

error: aborting due to previous error

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