pub fn main(world: World) -> Void raises {
    let bytes: [11]u8 = [122, 101, 114, 111, 45, 98, 117, 102, 102, 101, 114]
    var scratch: [11]u8 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
    let span: Span<u8> = std.mem.span("zero-buffer")
    let copied: usize = std.mem.copy(scratch, span)
    var i: i32 = 0
    var hits: i32 = 0
    while i < 10000 {
        if std.mem.eqlBytes(span, std.mem.span("zero-buffer")) {
            hits = hits + 1
        }
        i = i + 1
    }
    if hits == 10000 && copied == 11 && scratch[0] == 122 as u8 && std.mem.len(span) == 11 {
        check world.out.write("buffer\n")
    }
}