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    <pre class="message flowed">Package: sagemath
Version: 8.9-1
Severity: high

Tests are failing due to programation errors 
</pre>
    <ul>
      <li>may be GCC 9 is less permissive</li>
      <li>may be default library don't include objects with expected
        definition <br>
      </li>
    </ul>
    <p>but result is a strange message</p>
                    Success: 38 tests failed, up to 65 failures are
    tolerated<br>
    <p>                dpkg-buildpackage: error: debian/rules binary
      subprocess returned exit status 2</p>
    <p><br>
    </p>
    <pre class="message flowed">**********************************************************************
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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