[Debian-med-packaging] Bug#902516: python-matplotlib-venn: FTBFS in buster/sid (failing tests)

[Santiago Vila]

Package: src:python-matplotlib-venn
Version: 0.11.5-4
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
	pybuild --configure --test-pytest -i python{version} -p 2.7
I: pybuild base:217: python2.7 setup.py config 
running config
	pybuild --configure --test-pytest -i python{version} -p 3.6
I: pybuild base:217: python3.6 setup.py config 
running config
   dh_auto_build -i -O--buildsystem=pybuild
	pybuild --build --test-pytest -i python{version} -p 2.7

[... snipped ...]

    File "/usr/lib/python2.7/dist-packages/_pytest/main.py", line 719, in _perform_collect
      self.items.extend(self.genitems(node))
    File "/usr/lib/python2.7/dist-packages/_pytest/main.py", line 860, in genitems
      rep = collect_one_node(node)
    File "/usr/lib/python2.7/dist-packages/_pytest/runner.py", line 502, in collect_one_node
      rep = ihook.pytest_make_collect_report(collector=collector)
    File "/usr/lib/python2.7/dist-packages/pluggy/__init__.py", line 617, in __call__
      return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
    File "/usr/lib/python2.7/dist-packages/pluggy/__init__.py", line 222, in _hookexec
      return self._inner_hookexec(hook, methods, kwargs)
    File "/usr/lib/python2.7/dist-packages/pluggy/__init__.py", line 216, in <lambda>
      firstresult=hook.spec_opts.get('firstresult'),
    File "/usr/lib/python2.7/dist-packages/pluggy/callers.py", line 180, in _multicall
      res = hook_impl.function(*args)
    File "/usr/lib/python2.7/dist-packages/_pytest/runner.py", line 369, in pytest_make_collect_report
      'collect')
    File "/usr/lib/python2.7/dist-packages/_pytest/runner.py", line 189, in __init__
      self.result = func()
    File "/usr/lib/python2.7/dist-packages/_pytest/runner.py", line 368, in <lambda>
      lambda: list(collector.collect()),
    File "/usr/lib/python2.7/dist-packages/_pytest/doctest.py", line 217, in collect
      module = self.fspath.pyimport()
    File "/usr/lib/python2.7/dist-packages/py/_path/local.py", line 668, in pyimport
      __import__(modname)
    File "/<<PKGBUILDDIR>>/.pybuild/cpython2_2.7_matplotlib-venn/build/matplotlib_venn/__init__.py", line 55, in <module>
      from matplotlib_venn._venn2 import venn2, venn2_circles
    File "/<<PKGBUILDDIR>>/.pybuild/cpython2_2.7_matplotlib-venn/build/matplotlib_venn/_venn2.py", line 22, in <module>
      from matplotlib.pyplot import gca
    File "/usr/lib/python2.7/dist-packages/matplotlib/pyplot.py", line 71, in <module>
      from matplotlib.backends import pylab_setup
    File "/usr/lib/python2.7/dist-packages/matplotlib/backends/__init__.py", line 16, in <module>
      line for line in traceback.format_stack()
  
  
    '''

-- Docs: http://doc.pytest.org/en/latest/warnings.html
=============== 15 failed, 34 passed, 3 warnings in 0.60 seconds ===============
E: pybuild pybuild:336: test: plugin distutils failed with: exit code=1: cd /<<PKGBUILDDIR>>/.pybuild/cpython2_2.7_matplotlib-venn/build; python2.7 -m pytest 
dh_auto_test: pybuild --test --test-pytest -i python{version} -p 2.7 returned exit code 13
debian/rules:10: recipe for target 'override_dh_auto_test' failed
make[1]: *** [override_dh_auto_test] Error 25
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
debian/rules:7: 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/python-matplotlib-venn.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.