error: this constant cannot be used
  --> $DIR/array_const_index-1.rs:12:1
   |
LL | const B: i32 = A[1];
   | ^^^^^^^^^^^^^^^----^
   |                |
   |                index out of bounds: the len is 0 but the index is 1
   |
   = note: #[deny(const_err)] on by default

error: aborting due to previous error