[Debian-astro-maintainers] Bug#875471: fitspng segfaults with glibc-2.26, undefined strtok behaviour

[Matthias Klose]

Package: src:fitspng
Version: 0.3.5-1
Severity: serious
Tags: sid buster

the autopkg test segfaults when run with glibc-2.26, in fitspng.c line 683

  fw = strtok(fval[3])

exposed by
https://sourceware.org/bugzilla/show_bug.cgi?id=16640

the first call to strtok with a NULL pointer is undefined.