pub fn main(world: World) -> Void raises {
    var backing: [4]u8 = [0, 0, 0, 0]
    let alloc: FixedBufAlloc = std.mem.fixedBufAlloc(backing)
    let bytes: i32 = std.mem.allocBytes(alloc, 1)
    if bytes.has {
        check world.out.write("allocated")
    }
}