error[E0435]: attempt to use a non-constant value in a constant
  --> $DIR/non-const-value-in-const.rs:3:20
   |
LL |     const Y: i32 = x;
   |     -------        ^ non-constant value
   |     |
   |     help: consider using `let` instead of `const`: `let Y`

error[E0435]: attempt to use a non-constant value in a constant
  --> $DIR/non-const-value-in-const.rs:6:17
   |
LL |     let x = 5;
   |     ----- help: consider using `const` instead of `let`: `const x`
...
LL |     let _ = [0; x];
   |                 ^ non-constant value

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0435`.