warning: attempt to subtract with overflow
  --> $DIR/conditional_array_execution.rs:16:19
   |
LL | const FOO: u32 = [X - Y, Y - X][(X < Y) as usize];
   |                   ^^^^^
   |
note: lint level defined here
  --> $DIR/conditional_array_execution.rs:12:9
   |
LL | #![warn(const_err)]
   |         ^^^^^^^^^

warning: this constant cannot be used
  --> $DIR/conditional_array_execution.rs:16:1
   |
LL | const FOO: u32 = [X - Y, Y - X][(X < Y) as usize];
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ attempt to subtract with overflow

warning: constant evaluation error
  --> $DIR/conditional_array_execution.rs:21:20
   |
LL |     println!("{}", FOO);
   |                    ^^^ referenced constant has errors