Font problem with TL'20

[David Carlisle]

On Thu, 10 Dec 2020 at 16:22, Paulo Ney de Souza <pauloney at gmail.com> wrote:

> Many thanks, and I have one last question:
>
>     Do you know a way one can automatically check a PDF file for this kind
> of overprinting?
>

Not really (there was a font substitution warning in the latex run although
they are not always things to worry about.

Note we have improved the default substitution here so mc will substitute
(with a warning) to c and produce the condensed font without needing to
change the package after the next latex release (next week, probably)

https://github.com/latex3/latex2e/issues/453







> This one was caught by an operator at the start of a 5 thousand run...
> because it worked fine for some 20 years and no one even checked it before
> sending it to the big press.
>
> Paulo Ney
>
> On Wed, Dec 9, 2020 at 11:48 PM David Carlisle <d.p.carlisle at gmail.com>
> wrote:
>
>>
>>
>> On Thu, 10 Dec 2020 at 03:29, Paulo Ney de Souza <pauloney at gmail.com>
>> wrote:
>>
>>> Awesome, thanks! David. That does solve the problem.
>>>
>>> Is it possible/feasible to trace what other packages are in the same
>>> situation?
>>>
>>
>> yes I'll look, in  fact any packages using problematic \fontseries or
>> \DeclareFontShape were flagged with the package maintainers months before
>> the release (and I think by now most got changed) I think this slipped
>> through as it is using \usefont which we may have not searched for.
>>
>> there are three instances in my texlive tree
>>
>> $ pwd
>>
>> /usr/local/texlive/2020/texmf-dist/tex
>>
>> $ grep -r '\\usefont.*{m.}'
>>
>> latex/ean13isbn/ean13isbn.sty:  \def\zw at isbnfont
>> {\usefont{OT1}{phv}{mc}{n}\fontsize{\zw at isbnfsize}{\zw at isbnfsize
>> }\selectfont}}
>>
>> latex/recipecard/recipecard.cls:    \noindent\fontsize{14.4}{17}
>> \usefont{T1}{pzc}{mb}{it}%
>>
>> latex/songs/songs.sty:  \usefont{OT1}{pzc}{mb}{it}%
>>
>>
>> we will check if the other two cases are problematic.
>>
>>
>>
>>
>> David
>>
>>
>>> Paulo Ney
>>>
>>> On Wed, Dec 9, 2020 at 2:11 PM David Carlisle <d.p.carlisle at gmail.com>
>>> wrote:
>>>
>>>>
>>>> In a local copy change line 91 from
>>>>
>>>>   \def\zw at isbnfont{\usefont{OT1}{phv}{mc}{n}\fontsize{\zw at isbnfsize
>>>> }{\zw at isbnfsize}\selectfont}}
>>>>
>>>> to
>>>>
>>>>   \def\zw at isbnfont{\usefont{OT1}{phv}{c}{n}\fontsize{\zw at isbnfsize
>>>> }{\zw at isbnfsize}\selectfont}}
>>>>
>>>> deleting the `m`  the interpretation of mc has changed, normally it
>>>> will manage to default to the right thing with a warning but here the
>>>> condensed form needs c explicitly otherwise it falls back on the  medium m
>>>> and the letters are too wide.
>>>>
>>>> David
>>>>
>>>>
>>>>
>>>> On Wed, 9 Dec 2020 at 19:36, Paulo Ney de Souza <pauloney at gmail.com>
>>>> wrote:
>>>>
>>>>> The small file below, used to work fine
>>>>>
>>>>> ----
>>>>> \documentclass{report}
>>>>>
>>>>> \usepackage{ean13isbn}
>>>>>
>>>>> \begin{document}
>>>>> \EANisbn[ISBN=978-80-7340-097-2]
>>>>> \end{document}
>>>>> ----
>>>>>
>>>>> used to produce a fine bar-code (and numbers on top fine) in TL-18 and
>>>>> TL-19.... but in TL'20 one gets:
>>>>>
>>>>> [image: image.png]
>>>>>
>>>>> with a strange error message:
>>>>>
>>>>> (/usr/local/texlive/2020/texmf-dist/tex/latex/psnfss/ot1phv.fd)
>>>>> LaTeX Font Warning: Font shape `OT1/phv/mc/n' undefined
>>>>> (Font)              using `OT1/phv/m/n' instead on input line 6.
>>>>> LaTeX Font Warning: Some font shapes were not available, defaults
>>>>> substituted.
>>>>>
>>>>> which is different from TL-18 and TL-19:
>>>>>
>>>>> (/usr/local/texlive/2018/texmf-dist/tex/latex/psnfss/ot1phv.fd
>>>>> File: ot1phv.fd 2001/06/04 scalable font definitions for OT1/phv.) [1]
>>>>>
>>>>> Can anyone shed some light on what is going on?
>>>>>
>>>>> Paulo Ney
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
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