[Bug 2060434] Re: [noble] FTBFS on failure in test vlog - Python3, change of behavior in Python 3.13, backported to 3.12 and 3.11

[Frode Nordahl]

The relevant upstream Python changes are [0][1].

0: https://github.com/python/cpython/pull/105935
1: https://github.com/python/cpython/issues/116034

** Bug watch added: github.com/python/cpython/issues #116034
   https://github.com/python/cpython/issues/116034

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https://bugs.launchpad.net/bugs/2060434

Title:
  [noble] FTBFS on failure in test vlog - Python3, change of behavior in
  Python 3.13, backported to 3.12 and 3.11

Status in openvswitch package in Ubuntu:
  In Progress

Bug description:
  Full log: https://launchpadlibrarian.net/723457197/buildlog_ubuntu-
  noble-arm64.openvswitch_3.3.0-1build2_BUILDING.txt.gz

  
  ERROR: 1 test was run,
  1 failed unexpectedly.

  ## ------------------------ ##
  ## Summary of the failures. ##
  ## ------------------------ ##
  Failed tests:
  openvswitch 3.3.0 test suite test groups:

   NUM: FILE-NAME:LINE     TEST-GROUP-NAME
        KEYWORDS

   2531: vlog.at:3          vlog - Python3

  ## ---------------------- ##
  ## Detailed failed tests. ##
  ## ---------------------- ##

  #                             -*- compilation -*-
  2531. vlog.at:3: testing vlog - Python3 ...
  ../../tests/vlog.at:6: $PYTHON3 $srcdir/test-vlog.py --log-file log_file \
  -v dbg module_1:info module_2:warn syslog:off 2>stderr_log
  ../../tests/vlog.at:9: sed -e 's/.*-.*-.*T..:..:..Z |//' \
  -e 's/File ".*", line [0-9][0-9]*,/File <name>, line <number>,/' \
  stderr_log
  --- -	2024-04-06 13:05:02.236874405 +0000
  +++ /<<PKGBUILDDIR>>/_debian/tests/testsuite.dir/at-groups/2531/stdout	2024-04-06 13:05:02.210940554 +0000
  @@ -7,31 +7,37 @@
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     6  | module_0 | ERR | error exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     7  | module_0 | WARN | warn exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     8  | module_0 | INFO | information exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     9  | module_0 | DBG | debug exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     10 | module_0 | ERR | exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     11 | module_1 | EMER | emergency
     12 | module_1 | ERR | error
  @@ -41,26 +47,31 @@
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     17 | module_1 | ERR | error exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     18 | module_1 | WARN | warn exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     19 | module_1 | INFO | information exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     21 | module_1 | ERR | exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     22 | module_2 | EMER | emergency
     23 | module_2 | ERR | error
  @@ -69,20 +80,24 @@
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     28 | module_2 | ERR | error exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     29 | module_2 | WARN | warn exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError
     32 | module_2 | ERR | exception
   Traceback (most recent call last):
     File <name>, line <number>, in main
       assert fail
  +           ^^^^
   AssertionError

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