anchor.diff:  -ifdef(have_crypto_randuniform_support).
   test_have_crypto_randuniform_support(_Config) ->
       ?assert(lists:member(erlang:system_info(otp_release), ["R14B04", "R15B",
  -                                                           "R16B", "18", "19",
  +                                                           "R16B", "17", "18", "19",
                                                              "20", "21", "22"])),
       ok.
   -else.
  
positive.code:     ok.
  -else.
  test_have_new_stacktrace(_Config) ->
      ?assert(lists:member(erlang:system_info(otp_release), ["R14B04", "R15B",
                                                             "R16B", "18", "19"])),
      ok.
  -endif.
  
  
negative.code: -else.
  test_with_rand(_Config) ->
      ?assert(lists:member(erlang:system_info(otp_release), ["R14B04", "R15B",
                                                             "R16B", "17"])),
      ok.
  -endif.
  
  