Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [======================================================================
FAIL: test_simple_xml (test.test_xml_etree.XMLPullParserTest.test_simple_xml) (chunk_size=1)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/Python-3.12.2/Lib/test/test_xml_etree.py", line 1415, in test_simple_xml
    self.assert_event_tags(parser, [('end', 'element')])
  File "/builddir/build/BUILD/Python-3.12.2/Lib/test/test_xml_etree.py", line 1400, in assert_event_tags
    self.assertEqual([(action, elem.tag) for action, elem in events],
AssertionError: Lists differ: [] != [('end', 'element')]
Second list contains 1 additional elements.
First extra element 0:
('end', 'element')
- []
+ [('end', 'element')]
======================================================================
FAIL: test_simple_xml (test.test_xml_etree.XMLPullParserTest.test_simple_xml) (chunk_size=5)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/Python-3.12.2/Lib/test/test_xml_etree.py", line 1418, in test_simple_xml
    self.assert_event_tags(parser, [
  File "/builddir/build/BUILD/Python-3.12.2/Lib/test/test_xml_etree.py", line 1400, in assert_event_tags
    self.assertEqual([(action, elem.tag) for action, elem in events],
AssertionError: Lists differ: [('end', 'element')] != [('end', 'element'), ('end', 'empty-element')]
Second list contains 1 additional elements.
First extra element 1:
('end', 'empty-element')
- [('end', 'element')]
+ [('end', 'element'), ('end', 'empty-element')]
----------------------------------------------------------------------
Ran 1 test in 0.028s
FAILED (failures=2)
test test_xml_etree failed
0:02:42 load avg: 11.68 [2/2/2] test_xml_etree_c failed (2 failures)
Re-running test_xml_etree_c in verbose mode (matching: test_simple_xml, test_simple_xml)
test_simple_xml (test.test_xml_etree_c.XMLPullParserTest.test_simple_xml) ... 
  test_simple_xml (test.test_xml_etree_c.XMLPullParserTest.test_simple_xml) (chunk_size=1) ... FAIL
  test_simple_xml (test.test_xml_etree_c.XMLPullParserTest.test_simple_xml) (chunk_size=5) ... FAIL
======================================================================
FAIL: test_simple_xml (test.test_xml_etree_c.XMLPullParserTest.test_simple_xml) (chunk_size=1)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/Python-3.12.2/Lib/test/test_xml_etree.py", line 1415, in test_simple_xml
    self.assert_event_tags(parser, [('end', 'element')])
  File "/builddir/build/BUILD/Python-3.12.2/Lib/test/test_xml_etree.py", line 1400, in assert_event_tags
    self.assertEqual([(action, elem.tag) for action, elem in events],
AssertionError: Lists differ: [] != [('end', 'element')]
Second list contains 1 additional elements.
First extra element 0:
('end', 'element')
- []
+ [('end', 'element')]
======================================================================
FAIL: test_simple_xml (test.test_xml_etree_c.XMLPullParserTest.test_simple_xml) (chunk_size=5)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/Python-3.12.2/Lib/test/test_xml_etree.py", line 1418, in test_simple_xml
    self.assert_event_tags(parser, [
  File "/builddir/build/BUILD/Python-3.12.2/Lib/test/test_xml_etree.py", line 1400, in assert_event_tags
    self.assertEqual([(action, elem.tag) for action, elem in events],
AssertionError: Lists differ: [('end', 'element')] != [('end', 'element'), ('end', 'empty-element')]
Second list contains 1 additional elements.
First extra element 1:
('end', 'empty-element')
- [('end', 'element')]
+ [('end', 'element'), ('end', 'empty-element')]
----------------------------------------------------------------------
Ran 1 test in 0.018s
FAILED (failures=2]: [It shows a failing test.]


Answer: Issue: The expat library was updated and changed behavior.
Resolution: Backport commit from CPython upstream which fixes the issue.