[Debian-astro-maintainers] Bug#902455: ccdproc: FTBFS in buster/sid (failing tests)

[Santiago Vila]

Package: src:ccdproc
Version: 1.3.0-2
Severity: serious
Tags: ftbfs

Dear maintainer:

I tried to build this package in buster with "dpkg-buildpackage -A"
but it failed:

--------------------------------------------------------------------------------
[...]
 debian/rules build-indep
dh build-indep --with python2,python3 --buildsystem=pybuild
   dh_update_autotools_config -i -O--buildsystem=pybuild
   dh_autoreconf -i -O--buildsystem=pybuild
   dh_auto_configure -i -O--buildsystem=pybuild
I: pybuild base:217: python2.7 setup.py config 
running config
I: pybuild base:217: python3.6 setup.py config 
running config
   dh_auto_build -i -O--buildsystem=pybuild
I: pybuild base:217: /usr/bin/python setup.py build 
running build
running build_py

[... snipped ...]

  ccdproc/core.py:1568: RuntimeWarning: invalid value encountered in greater
    crarr = (rarr > thresh)

ccdproc/tests/test_ccdproc.py::test_flat_correct_does_not_change_input
  /usr/lib/python2.7/dist-packages/astropy/units/quantity.py:641: RuntimeWarning: invalid value encountered in true_divide
    *arrays, **kwargs)

ccdproc/tests/test_ccdproc.py::test_transform_image_does_not_change_input
  ccdproc/core.py:841: RuntimeWarning: invalid value encountered in sqrt
    nccd.data = transform_func(nccd.data, **kwargs)

ccdproc/tests/test_ccdproc.py::test_wcs_project_onto_shifted_wcs
  ccdproc/core.py:921: RuntimeWarning: invalid value encountered in greater
    reprojected_mask = reprojected_mask > 1e-8

ccdproc/tests/test_ccdproc.py::test_wcs_project_onto_scale_wcs
  ccdproc/core.py:921: RuntimeWarning: invalid value encountered in greater
    reprojected_mask = reprojected_mask > 1e-8

docs/ccdproc/image_combination.rst
  -c:1: RuntimeWarning: divide by zero encountered in divide
  -c:1: RuntimeWarning: divide by zero encountered in divide
  -c:1: RuntimeWarning: divide by zero encountered in divide
  ccdproc/combiner.py:169: UserWarning: Warning: converting a masked element to nan.
    self._scaling = np.array(self._scaling)
  ccdproc/combiner.py:169: UserWarning: Warning: converting a masked element to nan.
    self._scaling = np.array(self._scaling)
  ccdproc/combiner.py:169: UserWarning: Warning: converting a masked element to nan.
    self._scaling = np.array(self._scaling)

docs/ccdproc/image_management.rst
  ccdproc/image_collection.py:117: AstropyUserWarning: no FITS files in the collection.
    AstropyUserWarning)
  ccdproc/image_collection.py:117: AstropyUserWarning: no FITS files in the collection.
    AstropyUserWarning)
  ccdproc/image_collection.py:117: AstropyUserWarning: no FITS files in the collection.
    AstropyUserWarning)

-- Docs: http://doc.pytest.org/en/latest/warnings.html
========= 4 failed, 370 passed, 3 skipped, 17 warnings in 6.83 seconds =========
debian/rules:16: recipe for target 'test-python2.7' failed
make[1]: *** [test-python2.7] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
debian/rules:12: recipe for target 'build-indep' failed
make: *** [build-indep] Error 2
dpkg-buildpackage: error: debian/rules build-indep subprocess returned exit status 2
--------------------------------------------------------------------------------

The above is how the build ends in my autobuilder and it's not
necessarily the relevant part.

The failure is not, however, related to using dpkg-buildpackage -A,
as it also fails in reproducible builds:

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/ccdproc.html

If this is really a bug in one of the build-depends, please use reassign and affects,
so that this is still visible in the page for this package.

Thanks.