Test failures in `ExDoc.Language.ErlangTest`

[Odaeus]

With the latest head (277c401) I get 6 test failures in the form:

Generated ex_doc app
......................................................................................................................................................................................warning: documentation references module "array" but it is limited
  nofile



  1) test autolink_doc/2 module with anchor (ExDoc.Language.ErlangTest)
     test/ex_doc/language/erlang_test.exs:44
     Assertion with == failed
     code:  assert do_autolink_doc(ast) ==
              ~s"<a href=\"https://www.erlang.org/doc/man/array.html#anchor\"><code>array</code></a>"
     left:  "<code>array</code>"
     right: "<a href=\"https://www.erlang.org/doc/man/array.html#anchor\"><code>array</code></a>"
     stacktrace:
       test/ex_doc/language/erlang_test.exs:49: (test)

  2) test autolink_doc/2 custom text (ExDoc.Language.ErlangTest)
     test/ex_doc/language/erlang_test.exs:60
     Assertion with == failed
     code:  assert autolink_doc("{@link array. The <code>array</code> module}", c) ==
              ~s"<a href=\"https://www.erlang.org/doc/man/array.html\">The <code>array</code> module</a>"
     left:  "The <code>array</code> module"
     right: "<a href=\"https://www.erlang.org/doc/man/array.html\">The <code>array</code> module</a>"
     stacktrace:
       test/ex_doc/language/erlang_test.exs:61: (test)

..warning: documentation references module "array" but it is limited
  nofile

This is with a clean repo and running mix setup.

$ elixir --version
Erlang/OTP 24 [erts-12.2.1] [source] [64-bit] [smp:5:5] [ds:5:5:10] [async-threads:1]

Elixir 1.13.3 (compiled with Erlang/OTP 24)

$ uname -a
Linux gordo 5.13.0-28-generic #31-Ubuntu SMP Thu Jan 13 17:44:32 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux

Obviously the tests pass on CI so it has something to do with my system, but wanted to report this in case anyone else hits this issue or someone has already solved it.

[josevalim]

It is most likely that your Erlang version was not compiled with docs. @wojtekmach perhaps we should change the :otp24 tag to not be about otp24, but rather if there are docs for the Erlang modules.

[wojtekmach]

@josevalim yup, good call