[luatex] A possible bug

[luigi scarso]

On Thu, Apr 4, 2019 at 5:29 PM Javier Bezos <listas at tex-tipografia.com>
wrote:

> Maybe it has been already fixed, but I can't install 1.10
> right now, so first a little favour. What do you get with
> the following document (plain luatex):
>
> --------------------------------
> \directlua{
>
> function test (head, g)
>    texio.write_nl('==== ' .. g)
>    texio.write_nl('')
>    for item in node.traverse(head) do
>      if item.id == node.id'glyph' then
>        texio.write('{' .. item.char .. '}')
>      elseif item.id == node.id'dir' then
>        texio.write('<' .. item.dir .. '>')
>      elseif item.id == node.id'glue' then
>        texio.write(' ')
>      else
>        texio.write('[' .. item.id .. ':' .. (item.subtype or '?') .. ']')
>      end
>    end
>    return head
> end
>
> % callback.register("pre_linebreak_filter", test)
> callback.register("hpack_filter", test)
> }
>
> ABC \hbox{abc \textdir TRT fgh} DEF
>
> \textdir TLT
>
> ABC \hbox{abc \textdir TRT fgh} DEF
>
> \bye
> -----------------------------------
>
> With 1.07 the log shows:
>
> ==== hbox
> {97}{98}[13:0]{99} <+TRT>{102}{103}{104}
> ==== hbox
> {97}{98}[13:0]{99} <-TLT><+TRT>{102}{103}{104}
>
> Note the extra node with a closing dir after setting
> explicitly the global \textdir to TLT (which is the
> default dir). The stuff after this node is discarded.
>
> Does 1.10 give the same result?
>
> Javier
>
>
>

==== hbox
{97}{98}{99} <+TRT>{102}{103}{104}
==== hbox
{97}{98}{99} <+TRT>{102}{103}{104}
==== adjusted_hbox
[1:0]
==== adjusted_hbox


-- 
luigi
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