Unable to create empty array

[robinhundt]

fn main() -> bool {
    let a: [(usize); 0] = [];
    let b: [(usize); 0] = [];
    for _ in join(a, b) {}
    true
}

fails with

Parse error on line 2:28.
Expected an expression:
       | fn main() -> bool {
   2 > |     let a: [(usize); 0] = [];
     > |                            ^
       |     let b: [(usize); 0] = [];

Expected

It should be possible to create an empty array, even if that is not useful for most programs.