platex-dev: Class bxjsbook Error: The value of hyperref 'unicode' key is not suitable

[scottkosty]

On an updated TeX Live 2023 system, I get an error with platex-dev but not with platex. I am not sure but I wonder if the difference is due to a change in behavior of hyperref. Below is an example and the error:

\documentclass[12pt,oneside,fleqn,japanese,autodetect-engine, dvi=dvipdfmx, ja=standard]{bxjsbook}
\usepackage{lmodern}
\usepackage[T1]{fontenc}
\UseRawInputEncoding
\usepackage{babel}

\usepackage{hyperref}
% need to change?
%\usepackage[unicode=false]{hyperref}

\begin{document}
この文書は
\end{document}

Here's the error:

! Class bxjsbook Error: The value of hyperref 'unicode' key is not suitable
(bxjsbook)              for the present engine (must be false).

I attach the example.log file just in case.

If I indeed set unicode to false, it then compiles. I just wanted to make sure: is this change intended?

[u-fischer]

well it is not a hyperref change. For some reason platex-def uses e-uptex:

C:\Users\micro\Documents\Tests>platex-dev test-utf8
This is e-upTeX, Version 3.141592653-p4.1.0-u1.29-230214-2.6 (utf8.sjis) (TeX Live 202

C:\Users\micro\Documents\Tests>platex test-utf8
This is e-pTeX, Version 3.141592653-p4.1.0-230214-2.6 (utf8.sjis) (TeX Live 2023) 

and in e-uptex \forcecjktoken is defined and this changes a test in hyperref.

[scottkosty]

Thanks for taking a look! Should I report at https://github.com/latex3/latex2e/ or at https://github.com/texjporg/platex?

[aminophen]

For some reason platex-dev uses e-uptex:

That’is intended: see https://tug.org/pipermail/tex-live/2023-May/049250.html

[scottkosty]

@aminophen Thank you! Can you confirm that indeed specifying unicode=false is the correct approach? I don't know much about this stuff. I'm just trying to add a fix/workaround so that LyX's Japanese documents continue to compile.

@u-fischer sorry for the misdiagnosed report, and thank you for very much for starting that ML thread!

[u-fischer]

I leave that open for now. It is possible that hyperref should adapt to the new platex but I will wait for some feedback from @aminophen

[scottkosty]

I think the issue might be fixed. In any case, after a tlmgr update, tests seem to pass on my side.