Bug#942432: sagemath FTBFS on ppc64el

[Thierry Fauck@linux.ibm.com]

Package: sagemath
Version: 8.9-1
Severity: high

Tests are failing due to programation errors

  * may be GCC 9 is less permissive
  * may be default library don't include objects with expected definition

but result is a strange message

                 Success: 38 tests failed, up to 65 failures are tolerated

                 dpkg-buildpackage: error: debian/rules binary 
subprocess returned exit status 2


**********************************************************************
File "src/sage/cpython/dict_del_by_value.pyx", line 414, in sage.cpython.dict_del_by_value.test_del_dictitem_by_exact_value
Failed example:
     test_del_dictitem_by_exact_value(D, ZZ, 2)
Exception raised:
     Traceback (most recent call last):
       File "/<<PKGBUILDDIR>>/debian/build/usr/lib/python3/dist-packages/sage/doctest/forker.py", line 681, in _run
         self.compile_and_execute(example, compiler, test.globs)
       File "/<<PKGBUILDDIR>>/debian/build/usr/lib/python3/dist-packages/sage/doctest/forker.py", line 1123, in compile_and_execute
         exec(compiled, globs)
       File "<doctest sage.cpython.dict_del_by_value.test_del_dictitem_by_exact_value[7]>", line 1, in <module>
         test_del_dictitem_by_exact_value(D, ZZ, Integer(2))
       File "sage/cpython/dict_del_by_value.pyx", line 421, in sage.cpython.dict_del_by_value.test_del_dictitem_by_exact_value (build/cythonized/sage/cpython/dict_del_by_value.c:2387)
         del_dictitem_by_exact_value(<PyDictObject *>D, <PyObject *>value, h)
     TypeError: an integer is required
**********************************************************************
File "src/sage/cpython/dict_del_by_value.pyx", line 417, in sage.cpython.dict_del_by_value.test_del_dictitem_by_exact_value
Failed example:
     test_del_dictitem_by_exact_value(D, QQ, 1)
Exception raised:
     Traceback (most recent call last):
       File "/<<PKGBUILDDIR>>/debian/build/usr/lib/python3/dist-packages/sage/doctest/forker.py", line 681, in _run
         self.compile_and_execute(example, compiler, test.globs)
       File "/<<PKGBUILDDIR>>/debian/build/usr/lib/python3/dist-packages/sage/doctest/forker.py", line 1123, in compile_and_execute
         exec(compiled, globs)
       File "<doctest sage.cpython.dict_del_by_value.test_del_dictitem_by_exact_value[9]>", line 1, in <module>
         test_del_dictitem_by_exact_value(D, QQ, Integer(1))
       File "sage/cpython/dict_del_by_value.pyx", line 421, in sage.cpython.dict_del_by_value.test_del_dictitem_by_exact_value (build/cythonized/sage/cpython/dict_del_by_value.c:2387)
         del_dictitem_by_exact_value(<PyDictObject *>D, <PyObject *>value, h)
     TypeError: an integer is required
**********************************************************************
1 item had failures:
    2 of  12 in sage.cpython.dict_del_by_value.test_del_dictitem_by_exact_value
     [33 tests, 2 failures, 4.30 s]
**********************************************************************
File "src/sage/env.py", line 221, in sage.env._get_shared_lib_filename
Failed example:
Failed example:
     fnmatch(lib_filename, pattern)
Exception raised:
     Traceback (most recent call last):
       File "/<<PKGBUILDDIR>>/debian/build/usr/lib/python3/dist-packages/sage/doctest/forker.py", line 681, in _run
         self.compile_and_execute(example, compiler, test.globs)
       File "/<<PKGBUILDDIR>>/debian/build/usr/lib/python3/dist-packages/sage/doctest/forker.py", line 1123, in compile_and_execute
         exec(compiled, globs)
       File "<doctest sage.env._get_shared_lib_filename[5]>", line 1, in <module>
         fnmatch(lib_filename, pattern)
       File "/usr/lib/python3.7/fnmatch.py", line 34, in fnmatch
         name = os.path.normcase(name)
       File "/usr/lib/python3.7/posixpath.py", line 54, in normcase
         s = os.fspath(s)
     TypeError: expected str, bytes or os.PathLike object, not NoneType
**********************************************************************
1 item had failures:
    1 of   8 in sage.env._get_shared_lib_filename
**********************************************************************
File "src/sage/graphs/digraph_generators.py", line 597, in sage.graphs.digraph_generators.DiGraphGenerators.nauty_directg
Failed example:
     len(dgs)
Expected:
     13
Got:
     0
**********************************************************************
File "src/sage/graphs/digraph_generators.py", line 599, in sage.graphs.digraph_generators.DiGraphGenerators.nauty_directg
Failed example:
     dgs[0]
Exception raised:
     Traceback (most recent call last):
       File "/<<PKGBUILDDIR>>/debian/build/usr/lib/python3/dist-packages/sage/doctest/forker.py", line 681, in _run
         self.compile_and_execute(example, compiler, test.globs)
       File "/<<PKGBUILDDIR>>/debian/build/usr/lib/python3/dist-packages/sage/doctest/forker.py", line 1123, in compile_and_execute
         exec(compiled, globs)
       File "<doctest sage.graphs.digraph_generators.DiGraphGenerators.nauty_directg[3]>", line 1, in <module>
         dgs[Integer(0)]
     IndexError: list index out of range
*******************************************************************

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