Bug#855078: giac: FTBFS: [algo.pdf] Error 139 (Segmentation fault)

[Aaron M. Ucko]

Source: giac
Version: 1.2.3.25+dfsg1-1
Severity: important
Justification: fails to build from source

On several architectures, icas failed with a segmentation fault while
attempting to produce doc/fr/algo.pdf -- e.g., on arm64,

  xvfb-run ../../src/icas "algo.tex"
  ./algo.tex:4: Warning: Command not found: \textheight
  /usr/share/hevea/hyperref.hva:65: Warning: Ignoring option: 'pdftex'
  /usr/share/hevea/hyperref.hva:65: Warning: Ignoring option: 'colorlinks'
  ./algo.tex:33: Warning: Application of '\~' on 'p' failed
  Exclude comment 'comment'
  // Using locale /usr/share/locale/
  // C
  // /usr/share/locale/
  // giac
  // UTF-8
  // Maximum number of parallel threads 3
  // Unable to find keyword file doc/en/keywords
  Help file doc/en/aide_cas not found
  Added 0 synonyms
  Giac pdflatex and HTML5 output
  Partly inspired from pgiac by Jean-Michel Sarlat
  Segmentation fault
  Makefile:648: recipe for target 'algo.pdf' failed
  make[4]: *** [algo.pdf] Error 139
  make[4]: *** Waiting for unfinished jobs....

I see this (general) failure mode on arm64, mips, mips64el, ppc64el,
s390x, and the non-release architectures alpha, hppa, m68k, powerpc,
ppc64, sparc64, and x32.

Could you please take a look?

Thanks!

NB: some of the above output may be from hevea, which ran in parallel
with icas.

-- 
Aaron M. Ucko, KB1CJC (amu at alum.mit.edu, ucko at debian.org)
http://www.mit.edu/~amu/ | http://stuff.mit.edu/cgi/finger/?amu@monk.mit.edu