问Dialyzer说函数永远不会被调用，即使它是

EN

my_module.ex:3: The specification for 'Elixir.MyModule':f/0 states that the function might also return 'ok' | {'error',_} but the inferred return is none()
my_module.ex:4: Function f/0 has no local return
my_module.ex:14: Function g/1 will never be called

defmodule MyModule do
  @spec f() :: :ok | {:error, term}
  def f() do
    case ElixirTalk.connect('127.0.0.1', 11300) do
      {:ok, conn} ->
        g(conn)
      {:error, err} ->
        {:error, err}
    end
  end

  @spec g(pid) :: :ok
  defp g(pid) do
    :ok
  end
end

defmodule MyModule do
  @spec f() :: :ok
  def f() do
    x = spawn fn -> :done end
    g(x)
  end

  @spec g(pid) :: :ok
  defp g(pid) do
    :ok
  end
end