[luatex] \vsplit issue

[luigi scarso]

On Sat, May 21, 2016 at 12:40 AM, luigi scarso <luigi.scarso at gmail.com>
wrote:

>
>
> 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
>


------------------------------------------------------------------------
r6018 | luigi | 2016-05-21 13:45:32 +0200 (Sat, 21 May 2016) | 1 line
Changed paths:
   M /branches/experimental/manual/luatex-callbacks.tex
   M /branches/experimental/manual/luatex-enhancements.tex
   M /branches/experimental/manual/luatex.pdf

updated manual (HH)
------------------------------------------------------------------------

-- 
luigi
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