[XeTeX] Discretionary hyphens don't work in paragraphed footnotes

[Bruno Le Floch]

Here's a shorter example which hyphenates with cmr12 (in pdfTeX/XeTeX)
but not with the font copied from David's example: hyphenation is lost
when closing the hbox, as can be seen by adding the appropriate
\tracingonline=1\showboxbreadth=99 and \showlists just before the
closing brace.

I have no idea why hyphenation is lost, though.  As far as I can tell,
in David's example hyphenation is lost once the text is broken into
line a first time when put into a \vbox, while with cmr12 hyphenation
is kept through further unboxings.

--


\ifx\XeTeXversion\undefined
\font\x=cmr12
\else
\font\x="[lmroman12-regular]:mapping=tex-text"
\fi

\x

\setbox0\hbox{XXXXXXXXXXXXX just a few normal words to fill up the line
  up to my x x x zzzzzz\-zzzzz}

\unhbox0

\bye

On 10/8/15, Arthur Reutenauer <arthur.reutenauer at normalesup.org> wrote:
> On Thu, Oct 08, 2015 at 01:01:37PM +0100, David Carlisle wrote:
>> Here is a plain tex example, not quite as minimal as I'd like but out
>> of time for now.
>>
>> This hyphenates with pdftex but not xetex
>
>   Many thanks David, that's really helpful.
>
> 	Best,
>
> 		Arthur
>
>
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