message: OS X is "macos", not "darwin"
diff: @@ -30,7 +30,7 @@ fn main() {
  let _map : HashMap<i32, i32, BuildHasherDefault<collections::hash_map::DefaultHasher>> = Default::default();
  // TODO: Implement random number generation on OS X
  - if cfg!(not(target_os = "darwin")) {
  + if cfg!(not(target_os = "macos")) {
  let map_normal: HashMap<i32, i32> = HashMap::new();
  test_map(map_normal);
  } else {
  