Cloning a fixed-size array loses size info.

[canndrew]

The following code doesn't compile. It would be nice if it did.

fn main() {
  let x: [u8, ..1] = [0];
  let y: [u8, ..1] = x.clone();
}

This is because x.clone() returns a &[u8] instead of a [u8, ..1].

[thestinger]

There isn't a Clone implementation for fixed-size arrays, and providing one is not possible.

[thestinger]

This is covered by #7622.