Bug#951365: autopkgtest: blocks TL due to warnings of unknown specials

[Norbert Preining <norbert@preining.info>]

Package: pyxplot
Version: 0.9.2-10
Severity: important

Dear all,

pyxplot defines autopkgtest and currently blocks new TeX Live packages,
the sole reason being that pyxplot is unable to interpret new dvi
specials:
	file 'examples/ex_linestyles.ppl':103: Warning: ignoring unhandled DVI special string header=l3backend-dvips.pro
This is a new special introduced with recent LaTeX, see
	https://tug.org/pipermail/tex-live/2020-February/044737.html
and the whole thread.

The whole point of this bug report is that the warning shipped out is
innocent, but blocks TeX Live packages, and thus are to be honest a
PITA.

Please either disable these broken autopkgtests, or fix the package to
not emit warnings on these specials.

Thanks

Norbert


-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.5.3 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages pyxplot depends on:
ii  libc6                2.29-10
ii  libcfitsio8          3.470-3
ii  libfftw3-double3     3.3.8-2
ii  libgsl23             2.5+dfsg-6+b1
ii  libkpathsea6         2019.20190605.51237-3
ii  libpng16-16          1.6.37-2
ii  libreadline8         8.0-3
ii  libxml2              2.9.4+dfsg1-8
ii  texlive-latex-base   2019.20200210-1
ii  texlive-latex-extra  2019.202000210-1
ii  zlib1g               1:1.2.11.dfsg-1.2

Versions of packages pyxplot recommends:
ii  atril [postscript-viewer]               1.24.0-1
ii  evince [postscript-viewer]              3.34.1-1+b1
ii  ghostscript [postscript-viewer]         9.50~dfsg-5
ii  gv [postscript-viewer]                  1:3.7.4-2+b1
ii  imagemagick                             8:6.9.10.23+dfsg-2.1+b2
ii  imagemagick-6.q16 [imagemagick]         8:6.9.10.23+dfsg-2.1+b2
ii  okular [postscript-viewer]              4:17.12.2-2.2+b2
ii  pyxplot-doc                             0.9.2-10
ii  qpdfview-ps-plugin [postscript-viewer]  0.4.18-1.3
ii  sensible-utils                          0.0.12+nmu1

Versions of packages pyxplot suggests:
ii  unzip  6.0-25
ii  wget   1.20.3-1+b2

-- no debconf information