#15035 file_test.exs test fails on macOS

[pertsevds]

Elixir and Erlang/OTP versions

erlang 28.3.1
asdf 0.18

Operating system

macOS 26.2

Current behavior

To reproduce:

brew install asdf
asdf plugin add erlang https://github.com/asdf-vm/asdf-erlang.git
asdf install erlang 28.3.1
asdf plugin-add elixir https://github.com/asdf-vm/asdf-elixir.git
asdf install elixir ref:88cbabfd841f515cf1802c2cc827557a80a0f634

fails with error:

  1) test cp cp_r skips sockets and other special files (FileTest)
     test/elixir/file_test.exs:820
     ** (MatchError) no match of right hand side value:

         {:error, :einval}

     code: {:ok, socket} = :gen_tcp.listen(0, [:local, {:ifaddr, {:local, socket_path}}])
     stacktrace:
       test/elixir/file_test.exs:829: (test)

but previous ref

asdf install elixir ref:0f67706cf9ff4e0f933f788ebaaed065fc798338

builds just fine.

Expected behavior

asdf successfully builds ref 88cbabf

[pertsevds]

426a429 (main) and 3bb5f92 (v1.20.0-rc.1) fails with the same error.

[josevalim]

@pertsevds can you please try with Erlang 28.1 as a reference? I develop on a macOS (and the test works for me, but I haven't tried 28.3.1 yet).

[pertsevds]

Yes. Will do. A couple of minutes.

[pertsevds]

@josevalim same error on 28.1

[josevalim]

Ok, so I need more information to reproduce the issue, as that's literally the same versions I have locally. Can you please debug the test? Is it an access to a certain path on your machine? Does it work if you pick something else?

[pertsevds]

I'll try.

[pertsevds]

@josevalim
Without asdf all tests runs without errors.
It might be something with asdf + tmp path.

[pertsevds]

@josevalim I made it spew full path to the temp socket:

  1) test cp cp_r skips sockets and other special files (FileTest)
     test/elixir/file_test.exs:820
     ** (MatchError) no match of right hand side value:

         "/Users/pertsevds/.asdf/installs/elixir/ref-4972fff555743d2a5dc68425589d84331d4c4aa1/lib/elixir/tmp/src_with_socket/test.sock"

     code: :ok = socket_path
     stacktrace:
       test/elixir/file_test.exs:829: (test)

Path length is 125 chars. Google tells me that macOS unix socket path must be no more than 104 characters. That's the issue here.

[josevalim]

@pertsevds very helpful, thank you!