ices/68130.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#68130

#![feature(const_generics)]

pub type MatrixArray<T, const N : usize, const M : usize> = [T; N * M];

pub struct Matrix<T, const N : usize, const M : usize>
    where T : Copy + Sized
{
    store : MatrixArray<T, N, M>,
}

impl<T, const N : usize, const M : usize> Default for Matrix<T, N, M>
    where T : Copy + Sized + Default
{
    fn default() -> Self {
        let zero_comps = unsafe {
            let mut comps = std::mem::MaybeUninit::< MatrixArray<T, N, M> >::uninit().assume_init();
            for comp in comps.iter_mut() {
                *comp = T::default();
            }
            comps
        };
        Self {
            store : zero_comps
        }
    }
}

fn main() {}

=== stdout ===
=== stderr ===
warning: the feature `const_generics` is incomplete and may cause the compiler to crash
 --> /home/runner/work/glacier/glacier/ices/68130.rs:1:12
  |
1 | #![feature(const_generics)]
  |            ^^^^^^^^^^^^^^
  |
  = note: `#[warn(incomplete_features)]` on by default

error: constant expression depends on a generic parameter
 --> /home/runner/work/glacier/glacier/ices/68130.rs:8:5
  |
8 |     store : MatrixArray<T, N, M>,
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this may fail depending on what value the parameter takes

error: aborting due to previous error

==============