[luatex] Hyphen char vs discretionary (bug?)

[Javier Bezos]

I answer myself -- a new feature, of course:

\automatichyphenmode

Sorry for the noise.

Javier


> With the following document:
>
> -------------------------
> \directlua{
>
> function test (head)
>    texio.write_nl('====')
>    texio.write_nl('')
>    for item in node.traverse(head) do
>      if item.id == node.id'glyph' then
>        texio.write(unicode.utf8.char(item.char))
>      else
>        texio.write('[' .. item.id  .. ']')
>      end
>    end
>    return head
> end
>
> callback.register("pre_linebreak_filter", test)
> }
>
> 12-34
>
> \bye
> -------------------------
>
> TexLive 2017 (1.0.4) showed:
>
> [9][0]12-34[14]
>
> But with 2018 (1.07) I get:
>
> [9][0]12[7]34[14][12]
>
> In other words, the hyphen char has been replaced
> by a dicretrionary.
>
> Cheers
> Javier