[luatex] Logging \discretionary in words containing non-letters

[luigi scarso]

On Mon, Jun 22, 2015 at 8:44 AM, Joseph Wright <
joseph.wright at morningstar2.co.uk> wrote:

> Hello all,
>
> A little while ago I raised an issue about \discretionary in the log and
> non-letters in 'words' (
> http://tug.org/mailman/htdig/luatex/2015-April/005169.html). With LuaTeX
> 0.80 something like
>
>     \tracingoutput=1 %
>     \showboxdepth=\maxdimen
>     \showboxbreadth=\maxdimen
>     1-world
>     \bye
>
> gives the same log output as pdfTeX, i.e.
>
>     ...\tenrm 1
>     ...\tenrm -
>     ...\discretionary
>     ...\tenrm w
>     ...\kern-0.27779
>     ...\tenrm o
>     ...\tenrm r
>     ...\tenrm l
>     ...\tenrm d
>
> However, I now notice that things get a bit weird if there is more than
> one "-" in a 'word'
>
>     \tracingoutput=1 %
>     \showboxdepth\maxdimen
>     \showboxbreadth\maxdimen
>     1-b-c 1-b-c 1a-b-c a-b-1-d-e
>     \bye
>
> gives
>
>     ...\tenrm 1
>     ...\tenrm -
>     ...\discretionary
>     ...\tenrm b
>     ...\tenrm -
>     ...\tenrm c
>     ...\glue 3.33333 plus 1.66666 minus 1.11111
>     ...\tenrm 1
>     ...\tenrm -
>     ...\discretionary
>     ...\tenrm b
>     ...\tenrm -
>     ...\tenrm c
>     ...\glue 3.33333 plus 1.66666 minus 1.11111
>     ...\tenrm 1
>     ...\tenrm a
>     ...\tenrm -
>     ...\discretionary
>     ...\tenrm b
>     ...\tenrm -
>     ...\discretionary
>     ...\tenrm c
>     ...\glue 3.33333 plus 1.66666 minus 1.11111
>     ...\tenrm a
>     ...\tenrm -
>     ...\tenrm b
>     ...\tenrm -
>     ...\tenrm 1
>     ...\tenrm -
>     ...\discretionary
>     ...\tenrm d
>     ...\tenrm -
>     ...\tenrm e
>
> with LuaTeX 0.80.0 whereas pdfTeX marks every "-" as a \discretionary.
> Presumably this is not a deliberate change?
> --
> Joseph Wright
>

it more looks like some state gets lost or so in inserting - related disc
nodes.
We will investigate next week, thank you for the report and sorry for delay.
-- 
luigi
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