[LaTeX] Re: beamer and inputenc (utf8x) issue

[Walter Cazzola]

On Thu, 30 Jun 2022, Ulrike Fischer wrote:

> Am Thu, 30 Jun 2022 15:09:51 +0200 (CEST) schrieb Walter Cazzola:
>
>> Dear TeX-perts,
>> I'm using TeX live 2022 with a full and up-to-date installation on a linux
>> box.
>>
>> Recently the combination between beamer and inputenc gives an error
>>
>>    ! Argument of � has an extra }.
>>    <inserted text>
>>                  \par
>>    l.5 \begin{document}
>>
>>    ?
>>    Runaway argument?
>>    ! Paragraph ended before � was complete.
>>    <to be read again>
>>                     \par
>>    l.5 \begin{document}
>>
>> and pdflatex gives up on generating  the output.
>>
>> This is a minimal example showing the issue:
>>
>> \documentclass[a4paper]{beamer}
>>
>> \usepackage[utf8x]{inputenc}
>>
>> \begin{document}
>>
>> \end{document}
>>
>> The example is so minimal than this sounds as a bug to me but maybe I'm still
>> doing something wrong. Attached you have the corresponding log file.
>>
>> I know that the usage of utf8x is discouraged but this seems a bug that to
>> some extends could impede its use also when is the only option.
>
> I wrote the maintainer of ucs some weeks ago and told them what they
> must do if they want to stay compatible with the changes in hyperref
> (which followed changes in the utf8 handling in latex).
>
> My advice is: don't to use utf8x/ucs anymore if it doesn't get
> updated. It doesn't support the various improvement which have be
> done in the utf8 handling in latex, for example you can't load files
> with umlauts or use umlauts in \label with it.
>
> See also https://github.com/latex3/hyperref/issues/248

Thank you very much to clarify the issue. I didn't dig enough to get that the
problem was with hyperref rathern than with beamer. I will stop using utf8x.

Walter

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