error[E0308]: mismatched types
  --> $DIR/issue-62504.rs:18:21
   |
LL |         ArrayHolder([0; Self::SIZE])
   |                     ^^^^^^^^^^^^^^^ expected `X`, found `Self::SIZE`
   |
   = note: expected constant `X`
              found constant `Self::SIZE`

error: unconstrained generic constant
  --> $DIR/issue-62504.rs:18:25
   |
LL |         ArrayHolder([0; Self::SIZE])
   |                         ^^^^^^^^^^
   |
help: try adding a `where` bound
   |
LL |     pub const fn new() -> Self where [(); Self::SIZE]: {
   |                                +++++++++++++++++++++++

error[E0284]: type annotations needed for `ArrayHolder<_>`
  --> $DIR/issue-62504.rs:26:9
   |
LL |     let mut array = ArrayHolder::new();
   |         ^^^^^^^^^   ------------------ type must be known at this point
   |
note: required by a const generic parameter in `ArrayHolder::<X>::new`
  --> $DIR/issue-62504.rs:16:6
   |
LL | impl<const X: usize> ArrayHolder<X> {
   |      ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder::<X>::new`
LL |     pub const fn new() -> Self {
   |                  --- required by a bound in this associated function
help: consider giving `array` an explicit type, where the value of const parameter `X` is specified
   |
LL |     let mut array: ArrayHolder<X> = ArrayHolder::new();
   |                  ++++++++++++++++

error[E0284]: type annotations needed for `ArrayHolder<_>`
  --> $DIR/issue-62504.rs:26:9
   |
LL |     let mut array = ArrayHolder::new();
   |         ^^^^^^^^^   ----------- type must be known at this point
   |
note: required by a const generic parameter in `ArrayHolder`
  --> $DIR/issue-62504.rs:14:20
   |
LL | struct ArrayHolder<const X: usize>([u32; X]);
   |                    ^^^^^^^^^^^^^^ required by this const generic parameter in `ArrayHolder`
help: consider giving `array` an explicit type, where the value of const parameter `X` is specified
   |
LL |     let mut array: ArrayHolder<X> = ArrayHolder::new();
   |                  ++++++++++++++++

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0284, E0308.
For more information about an error, try `rustc --explain E0284`.