Constants behave differently depending on the way they're initialized.

[tbu-]

I can't match using a constant that was initialized using a byte string literal:

const ARRAY1: [u8; 0] = [];
const ARRAY2: [u8; 0] = *b"";

fn main() {
    match [] {
        ARRAY1 => {}
        ARRAY2 => {}
    }
}

This gets an error:

a.rs:2:25: 2:29 error: constant evaluation error: unsupported constant expr
a.rs:2 const ARRAY2: [u8; 0] = *b"";
                               ^~~~
a.rs:7:9: 7:15 note: in pattern here
a.rs:7         ARRAY2 => {}
               ^~~~~~
a.rs:2:25: 2:29 error: unsupported constant expr
a.rs:2 const ARRAY2: [u8; 0] = *b"";
                               ^~~~

[tbu-]

It seems this is a duplicate of #25574.