Hi!

While rebuilding the python related packages against the Python 3.15
version we found that plaso fails to build from source:
https://debusine.debian.net/debian/r-python-python3.15/artifact/4856608/

 From the log, the error seems to be:
======================================================================
FAIL: testParse26
(parsers.winprefetch.WinPrefetchParserTest.testParse26)
Tests the Parse function on a version 26 Prefetch file.
----------------------------------------------------------------------
Traceback (most recent call last):
   File
"/build/reproducible-path/plaso-20260119/tests/parsers/winprefetch.py",
line 286, in testParse26
     self.CheckEventData(event_data, expected_event_values)
     ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File
"/build/reproducible-path/plaso-20260119/tests/parsers/test_lib.py",
line 178, in CheckEventData
     self.assertEqual(value, expected_value, error_message)
     ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: None != ['2013-10-04T15:28:09.0103565+00:00', '20[65
chars]:00'] : event value: "previous_run_times" does not match expected
value

======================================================================
FAIL: testParse30Compressed
(parsers.winprefetch.WinPrefetchParserTest.testParse30Compressed)
Tests the Parse function on a compressed version 30 Prefetch file.
----------------------------------------------------------------------
Traceback (most recent call last):
   File
"/build/reproducible-path/plaso-20260119/tests/parsers/winprefetch.py",
line 334, in testParse30Compressed
     self.CheckEventData(event_data, expected_event_values)
     ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File
"/build/reproducible-path/plaso-20260119/tests/parsers/test_lib.py",
line 178, in CheckEventData
     self.assertEqual(value, expected_value, error_message)
     ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: None != ['2015-05-14T22:11:55.3576520+00:00', '20[176
chars]:00'] : event value: "previous_run_times" does not match expected
value

======================================================================
FAIL: testParse30Variant1Compressed
(parsers.winprefetch.WinPrefetchParserTest.testParse30Variant1Compressed)
Tests the Parse function on a compressed version 30 variant 1 file.
----------------------------------------------------------------------
Traceback (most recent call last):
   File
"/build/reproducible-path/plaso-20260119/tests/parsers/winprefetch.py",
line 379, in testParse30Variant1Compressed
     self.CheckEventData(event_data, expected_event_values)
     ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File
"/build/reproducible-path/plaso-20260119/tests/parsers/test_lib.py",
line 178, in CheckEventData
     self.assertEqual(value, expected_value, error_message)
     ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: None != ['2015-05-14T22:10:28.6747101+00:00'] : event
value: "previous_run_times" does not match expected value

======================================================================
FAIL: testParse30Variant2Compressed
(parsers.winprefetch.WinPrefetchParserTest.testParse30Variant2Compressed)
Tests the Parse function on a compressed version 30 variant 2 file.
----------------------------------------------------------------------
Traceback (most recent call last):
   File
"/build/reproducible-path/plaso-20260119/tests/parsers/winprefetch.py",
line 424, in testParse30Variant2Compressed
     self.CheckEventData(event_data, expected_event_values)
     ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File
"/build/reproducible-path/plaso-20260119/tests/parsers/test_lib.py",
line 178, in CheckEventData
     self.assertEqual(value, expected_value, error_message)
     ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: None != ['2019-06-05T19:23:00.8157052+00:00'] : event
value: "previous_run_times" does not match expected value

Please note that while we ran into this error during the rebuild against
Python 3.15, that doesn't mean that the root cause for the failure is
necessarily the new Python version.

Setting the severity to important for now. Once Python 3.15 is released
and later added to python3-defaults, this bug will become release
critical.