Hey OGs,
I have a function that loads csv files into my app. When my user used special characters, it failed
they used name like: Zoë
Here is my function:

defp read(csv) do
    csv.path
    |> Path.expand()
    |> File.stream!()
    |> CSV.decode(headers: true)
    |> Stream.map(fn {:ok, data} -> data end)
    |> Stream.reject(&is_nil/1)
    |> break_point()
    |> Enum.to_list() # It fails here
    |> Enum.uniq()
  end

Error:

The following arguments were given to CSV.Decoding.Preprocessing.Lines.starts_sequence?/5:
    
        # 1
        <<145, 32, 72, 111, 97, 100, 44, 105, 110, 115, 116, 97, 103, 114, 97, 109>>
    
        # 2
        "o"
    
        # 3
        false
    
        # 4
        44
    
        # 5
        ""
Attempted function clauses (showing 5 out of 5):
    
        defp starts_sequence?(<<34::utf8(), tail::binary()>>, last_token, false, separator, _) when last_token == <<separator::utf8()>>
        defp starts_sequence?(<<34::utf8(), tail::binary()>>, "", false, separator, _)
        defp starts_sequence?(<<34::utf8(), tail::binary()>>, _, quoted, separator, sequence_start)
        defp starts_sequence?(<<head::utf8(), tail::binary()>>, _, quoted, separator, sequence_start)
        defp starts_sequence?("", _, quoted, _, sequence_start)

Apparently, it couldn’t recognise this character ë
I wished I could like make a callback for starts_sequence? to return a meaningful error or something like that…
How can I prevent this from happening ?