[luatex] \vsplit issue

[luigi scarso]

On Sat, May 21, 2016 at 12:19 AM, luigi scarso <luigi.scarso at gmail.com>
wrote:

>
>
> On Fri, May 20, 2016 at 11:58 PM, luigi scarso <luigi.scarso at gmail.com>
> wrote:
>
>>
>>
>> On Fri, May 20, 2016 at 10:58 PM, Joseph Wright <
>> joseph.wright at morningstar2.co.uk> wrote:
>>
>>> Hello all,
>>>
>>> The example
>>>
>>>     \setbox0=\vbox{a\par b\par c\par d}
>>>     \setbox2=\vsplit0 to 2cm %
>>>     %\showboxbreadth\maxdimen
>>>     %\showboxdepth\maxdimen
>>>     %\showbox2 %
>>>     \bye
>>>
>>> gives an underful vbox with pdfTeX, leading to a warning and box trace
>>> in the log. The same isn't the case for LuaTeX (v0.95 from TL'16), which
>>> comes from the fact the box is no longer the same size:
>>>
>>>     > \box2=
>>>     \vbox(40.30554+0.0)x469.75499, direction TLT
>>>
>>> from LuaTeX, wherease pdfTeX gives
>>>
>>>     > \box2=
>>>     \vbox(56.9055+0.0)x469.75499, glue set 5.53333
>>>
>>> An error?
>>>
>>> Joseph
>>>
>>
>> thank you for the report, we are seeing it.
>>
>> --
>> luigi
>>
> It's a bug:
> we have a patch, but we also want to implement upto
>
> \vsplit to 2cm
> \vsplit upto 2cm
>
> so this keyword saves a \setbox2\vbox{\unvbox2}
>
> We will commit it to experimental (which is already 0.96.0,
>
>
 ------------------------------------------------------------------------
r6017 | luigi | 2016-05-21 00:40:03 +0200 (Sat, 21 May 2016) | 1 line
Changed paths:
   M /branches/experimental/source/texk/web2c/luatexdir/tex/packaging.w

fix for vsplit and new upto (HH)
------------------------------------------------------------------------


-- 
luigi
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