gh-136438: Make sure test_compile pass with all optimization levels

[donBarbos]

output before:

======================================================================
ERROR: test_compile_ast (test.test_compile.TestSpecifics.test_compile_ast)
----------------------------------------------------------------------
Traceback (most recent call last):
  File ".../cpython/Lib/test/test_compile.py", line 597, in test_compile_ast
    co2 = compile(ast, '%s3' % fname, 'exec')
ValueError: empty body on FunctionDef

======================================================================
FAIL: test_remove_unused_consts (test.test_compile.TestSpecifics.test_remove_unused_consts)
----------------------------------------------------------------------
Traceback (most recent call last):
  File ".../cpython/Lib/test/test_compile.py", line 826, in test_remove_unused_consts
    self.assertEqual(f.__code__.co_consts,
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
                     (f.__doc__, "used"))
                     ^^^^^^^^^^^^^^^^^^^^
AssertionError: Tuples differ: (True, 'used') != (None, 'used')

First differing element 0:
True
None

- (True, 'used')
?  ^^^

+ (None, 'used')
?  ^^^


======================================================================
FAIL: test_strip_unused_None (test.test_compile.TestSpecifics.test_strip_unused_None)
----------------------------------------------------------------------
Traceback (most recent call last):
  File ".../cpython/Lib/test/test_compile.py", line 872, in test_strip_unused_None
    self.assertEqual(f1.__code__.co_consts, (f1.__doc__,))
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Tuples differ: (42,) != (None,)

First differing element 0:
42
None

- (42,)
+ (None,)

----------------------------------------------------------------------

• Issue: Multiple tests fail with -OO #136438

[aisk]

Hi, I found that the failed test test_compile_ast is caused when try to compile this function:

cpython/Lib/test/test_compile.py

Lines 1200 to 1201 in b78e9c0

	def no_code1():
	"doc string"

It will failed because the doc string in function body is omitted by the -OO flag. But this is more like a bug, and have been fixed in current main branch (I didn't found which commit but I think it don't matters). So I think we can merge current main branch (click the 'Update branch' button in this page bellow), and revert the changes in test_compile_ast function.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Stable Refleaks 3.x (tier-3) has failed when building commit f914e0a.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1641/builds/822) and take a look at the build logs.
4. Check if the failure is related to this commit (f914e0a) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1641/builds/822

Failed tests:

• test_external_inspection
• test_os

Failed subtests:

• test_only_active_thread - test.test_external_inspection.TestGetStackTrace.test_only_active_thread
• test_timerfd_select - test.test_os.TimerfdTests.test_timerfd_select

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x.refleak/build/Lib/test/test_external_inspection.py", line 1246, in test_only_active_thread
    self.assertEqual(
    ~~~~~~~~~~~~~~~~^
        len(gil_traces), 1, "Should have exactly one GIL holder"
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: 0 != 1 : Should have exactly one GIL holder


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x.refleak/build/Lib/test/test_os.py", line 4465, in test_timerfd_select
    self.assertEqual(self.read_count_signaled(fd), 1)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 5 != 1