warning: this operation will panic at runtime
  --> $DIR/array-literal-index-oob.rs:7:8
   |
LL |     &{ [1, 2, 3][4] };
   |        ^^^^^^^^^^^^ index out of bounds: the length is 3 but the index is 4
   |
note: the lint level is defined here
  --> $DIR/array-literal-index-oob.rs:4:20
   |
LL | #![warn(const_err, unconditional_panic)]
   |                    ^^^^^^^^^^^^^^^^^^^

warning: 1 warning emitted