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Test failure on Python 3.14 #88
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Thanks for pointing this out @gotmax23, this should be fixed before we have a stable python3.14 release as it's a blocker otherwise.
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on Oct 22, 2025 I've modified the test archive to remove the special '6-FIFOTYPE' file and also modified the test expectations for now. It does not seem like we are reducing any test coverage with this, but we can always reopen this later if so.
Thanks for the report @gotmax23, we also have a commoncode release with python 3.14 support, now that we have a stable python3.14 release out.
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on Jan 8, 2026 It is actually better to set the
filter='fully_trusted'inextractall()functions as this is used in a very specific context of extracting archives meant as testfiles (which we create ourselves), so these are trusted and safe.This was also needed for aboutcode-org/scancode-toolkit#4595 as we were failing some tests because of symlinks present in test archives for alpine package detection tests.
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on Jan 8, 2026 Strangely enough, this works on Python 3.14 now, but fails on the current Python 3.15 alpha:
____________________________ TypeTest.test_get_type ____________________________ [gw2] linux -- Python 3.15.0 /opt/hostedtoolcache/Python/3.15.0-alpha.5/x64/bin/python self = <test_filetype.TypeTest testMethod=test_get_type> def test_get_type(self): > test_dir = self.extract_test_tar( "filetype/types.tar", verbatim=True, filter="fully_trusted" ) tests/test_filetype.py:37: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ /opt/hostedtoolcache/Python/3.15.0-alpha.5/x64/lib/python3.15/site-packages/commoncode/testcase.py:219: in extract_test_tar return self.__extract(test_path, extract_tar, verbatim, filter) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ /opt/hostedtoolcache/Python/3.15.0-alpha.5/x64/lib/python3.15/site-packages/commoncode/testcase.py:209: in __extract extract_func(original_archive, target_dir, verbatim=verbatim, filter=filter) /opt/hostedtoolcache/Python/3.15.0-alpha.5/x64/lib/python3.15/site-packages/commoncode/archive.py:65: in extract_tar tar.extractall(target_dir, members=to_extract) /opt/hostedtoolcache/Python/3.15.0-alpha.5/x64/lib/python3.15/tarfile.py:2408: in extractall tarinfo, unfiltered = self._get_extract_tarinfo( /opt/hostedtoolcache/Python/3.15.0-alpha.5/x64/lib/python3.15/tarfile.py:2497: in _get_extract_tarinfo self._handle_fatal_error(e) /opt/hostedtoolcache/Python/3.15.0-alpha.5/x64/lib/python3.15/tarfile.py:2495: in _get_extract_tarinfo filtered = filter_function(unfiltered, path) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ /opt/hostedtoolcache/Python/3.15.0-alpha.5/x64/lib/python3.15/tarfile.py:858: in data_filter new_attrs = _get_filtered_attrs(member, dest_path, True) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ member = <TarInfo '6-FIFOTYPE' at 0x7f36b78dc7c0> dest_path = '/tmp/scancode-tk-tests -d7q2jp9v/cew9uh0b/types.tar' for_data = True def _get_filtered_attrs(member, dest_path, for_data=True): new_attrs = {} name = member.name dest_path = os.path.realpath(dest_path, strict=os.path.ALLOW_MISSING) # Strip leading / (tar's directory separator) from filenames. # Include os.sep (target OS directory separator) as well. if name.startswith(('/', os.sep)): name = new_attrs['name'] = member.path.lstrip('/' + os.sep) if os.path.isabs(name): # Path is absolute even after stripping. # For example, 'C:/foo' on Windows. raise AbsolutePathError(member) # Ensure we stay in the destination target_path = os.path.realpath(os.path.join(dest_path, name), strict=os.path.ALLOW_MISSING) if os.path.commonpath([target_path, dest_path]) != dest_path: raise OutsideDestinationError(member, target_path) # Limit permissions (no high bits, and go-w) mode = member.mode if mode is not None: # Strip high bits & group/other write bits mode = mode & 0o755 if for_data: # For data, handle permissions & file types if member.isreg() or member.islnk(): if not mode & 0o100: # Clear executable bits if not executable by user mode &= ~0o111 # Ensure owner can read & write mode |= 0o600 elif member.isdir() or member.issym(): # Ignore mode for directories & symlinks mode = None else: # Reject special files > raise SpecialFileError(member) E tarfile.SpecialFileError: '6-FIFOTYPE' is a special file /opt/hostedtoolcache/Python/3.15.0-alpha.5/x64/lib/python3.15/tarfile.py:815: SpecialFileError- added a commit that references this issue
on Jun 9, 2026
One of the tests is failing on Python 3.14 due to changes in the tarfile module. See https://peps.python.org/pep-0706/. Starting in Python 3.14,
tarfile.extractalldefaults todata_filter()when unpacking archives which does not allow special files.Downstream bug: https://bugzilla.redhat.com/show_bug.cgi?id=2325197