Package: texlive-latex-base Version: 2023.20231007-1 Severity: normal X-Debbugs-Cc: stuart@debian.org Dear Maintainer, The unittests of the 'plastex' package run pdflatex to generate some figures, and then extract the text from the figures to verify that various implementation details of the package are working. These tests pass on all release architectures except s390x. They also fail on ppc64. The common feature of the failures is that the architecture is big-endian. The failures are all similar to: AssertionError: 'hi' != '\x00\x00' i.e. the text that is found in the PDF (either by gs or pdftotext) is the same number of bytes as the original text, but is all \0. The extraction is platform-independent — the attached s390x.pdf yields \0\0 for its text no matter what arch pdftotext or gs is run on. The PDFs all _look_ OK in any PDF viewer, it's just the text extraction that fails. If the pdf is generated via latex followed by dvipdf then the extracted text is correct (up to whitespace); if the pdf is generated by lualatex then he extracted text is correct. It seems that pdflatex is mishandling embedding the text on big endian systems. Speculating wildly... it looks a bit like pdflatex is taking the wrong byte out of a multibyte character representation, and ending up with \0 rather than the byte of interest, but I don't know how pdflatex is representing the characters internally or how it is encoding them into the PDF. While I don't expect that there are many direct users of pdflatex on s390x, testing migration within Debian now requires successful completion of unittests on s390x, and so arch-specific bugs on s390x become relevant. Attached: test.tex (one of the little .tex files plastex generates in its tests) amd64.pdf (output of "pdflatex test.tex" on amd64) s390x.pdf (output of "pdflatex test.tex" on s390x) (access to s390x and ppc64 courtesy of Debian's porter boxes zelenka.debian.org and perotto.debian.net) regards Stuart
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amd64.pdf
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s390x.pdf
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\nonstopmode\AtBeginDocument{\thispagestyle{empty}}\documentclass{article}\usepackage{microtype}\DisableLigatures{encoding = *, family = *}\begin{document}\newif\iffoo\footrue\iffoo hi\else bye\fi\end{document}