Hi On Mon, 11 May 2026, Aaron M. Ucko wrote: > As I recall, my pre-filing investigation found that libpng leaves any > trailing portion of the row's final byte unspecified. It would of > course be possible to tighten that policy up, but there's normally no > need to, even from a reproducibility perspective, because such bits are > typically of no interest to consumers anyway. As such, it falls on > pdfTeX and anything else that takes a similar approach to clear those
Let me disagree strongly. If it is not "in the interest to consumers", why should pdftex clean up after a mess that libpng made. If you (== Debian) want reproducibility, then it is **your** job to clean up libpng artifacts, not downstream. So this is a libpng problem, not pdftex problem. Best regards Norbert -- DI Dr Norbert Preining https://www.preining.info arXiv / Cornell University + IFMGA Guide + TU Wien + TeX Live GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13
