gh-107901: add the HAS_EVAL_BREAK instruction flag

[iritkatriel]

This is motivated by #107901, which implies we need to make sure that all instructions the have an eval breaker check also have a line number.

I'm not adding that assertion here because it will fail, so that's going to require more work.

• Issue: Traceback says line -1 when KeyboardInterrupt during minimal for-if-loop  #107901

[gvanrossum]

I like how the flags framework is so easily extensible.

[gvanrossum]

Using a mutable default sets alarm bells off in my head, even though you're safe in this case. Maybe make it an abstract set?

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Debian root 3.x has failed when building commit 5f41376.

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/all/#builders/345/builds/5629) and take a look at the build logs.
4. Check if the failure is related to this commit (5f41376) 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/all/#builders/345/builds/5629

Failed tests:

• worker>
• <regrtest

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

== Tests result: FAILURE then FAILURE ==

188 tests omitted:
test.test_asyncio.test_base_events test.test_asyncio.test_events
test.test_asyncio.test_futures2 test.test_asyncio.test_pep492
test.test_asyncio.test_proactor_events
test.test_asyncio.test_sendfile test.test_asyncio.test_ssl
test.test_asyncio.test_sslproto test.test_asyncio.test_tasks
test.test_asyncio.test_timeouts test.test_asyncio.test_transports
test.test_asyncio.test_windows_events
test.test_asyncio.test_windows_utils
test.test_concurrent_futures.test_deadlock
test.test_concurrent_futures.test_shutdown
test.test_concurrent_futures.test_wait
test.test_multiprocessing_fork.test_misc
test.test_multiprocessing_forkserver.test_processes
test.test_multiprocessing_spawn.test_manager
test.test_multiprocessing_spawn.test_processes test___all__
test___future__ test__xxinterpchannels test__xxsubinterpreters
test_abc test_asdl_parser test_ast test_asyncgen test_atexit
test_audit test_baseexception test_bdb test_bigmem test_binascii
test_binop test_bufio test_builtin test_bytes test_capi
test_charmapcodec test_clinic test_code test_codecencodings_cn
test_codecencodings_iso2022 test_codecencodings_jp
test_codecmaps_cn test_codecmaps_hk test_codecmaps_kr
test_collections test_compile test_compiler_assemble test_complex
test_context test_contextlib test_contextlib_async test_coroutines
test_crashers test_curses test_dbm test_dbm_dumb test_dbm_gnu
test_dis test_doctest test_docxmlrpc test_email test_embed
test_enum test_enumerate test_errno test_except_star
test_exception_variations test_exceptions test_file_eintr
test_filecmp test_fileutils test_fnmatch test_format
test_funcattrs test_functools test_future3 test_gc test_gdb
test_generated_cases test_generator_stop test_genericclass
test_genericpath test_global test_grammar test_httplib
test_imaplib test_importlib test_inspect test_int_literal
test_interpreters test_io test_isinstance test_iter test_itertools
test_json test_keywordonlyarg test_kqueue test_launcher
test_lltrace test_locale test_longexp test_memoryio
test_memoryview test_metaclass test_mimetypes test_monitoring
test_multibytecodec test_multiprocessing_main_handling test_ntpath
test_numeric_tower test_openpty test_operator test_os test_patma
test_perf_profiler test_pickletools test_pkg test_poll test_poplib
test_positional_only_arg test_posixpath test_print test_profile
test_pstats test_pwd test_py_compile test_pydoc test_raise
test_range test_repl test_resource test_rlcompleter test_runpy
test_sax test_secrets test_set test_shlex test_shutil test_signal
test_smtplib test_sqlite3 test_stat test_stringprep test_structseq
test_sundry test_support test_sys_settrace test_syslog
test_tarfile test_tempfile test_textwrap test_thread test_timeit
test_tkinter test_tokenize test_tomllib test_tools test_ttk
test_ttk_textonly test_tuple test_turtle test_type_annotations
test_type_comments test_type_params test_typing test_ucn
test_unary test_unicode_identifiers test_unicodedata test_unittest
test_unpack test_unparse test_urllib2_localnet
test_urllib_response test_userstring test_venv test_warnings
test_weakset test_with test_wsgiref test_xxtestfuzz test_zipfile
test_zipfile64 test_zoneinfo

265 tests OK.

10 slowest tests:

• test_mailbox: 4 min
• test_largefile: 3 min 13 sec
• test_shelve: 2 min 40 sec
• test_math: 2 min 27 sec
• test_cppext: 1 min 3 sec
• test.test_multiprocessing_spawn.test_misc: 58.5 sec
• test_peg_generator: 54.4 sec
• test_hashlib: 51.1 sec
• test_compileall: 48.6 sec
• test_regrtest: 44.5 sec

1 test failed:

10 tests skipped:
test_dbm_ndbm test_devpoll test_idle test_ioctl test_startfile
test_tcl test_winconsoleio test_winreg test_winsound test_wmi

1 re-run test:

Total duration: 26 min 41 sec

Click to see traceback logs

Traceback (most recent call last):
  File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/libregrtest/runtest.py", line 375, in _runtest_inner
    refleak = _runtest_inner2(ns, test_name)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/libregrtest/runtest.py", line 315, in _runtest_inner2
    the_module = importlib.import_module(abstest)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1293, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1266, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1230, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'test.<regrtest worker>'


Traceback (most recent call last):
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/support/__init__.py", line 203, in _force_run
Warning --     return func(*args)
Warning --            ^^^^^^^^^^^
Warning -- OSError: [Errno 39] Directory not empty: '/tmp/test_python_982lzjpi/tmp30gys4fb/python-installation/lib/python3.13/test'
Warning -- 
Warning -- During handling of the above exception, another exception occurred:
Warning -- 
Warning -- Traceback (most recent call last):
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/libregrtest/runtest_mp.py", line 350, in run
Warning --     mp_result = self._runtest(test_name)
Warning --                 ^^^^^^^^^^^^^^^^^^^^^^^^
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/libregrtest/runtest_mp.py", line 297, in _runtest
Warning --     os_helper.rmtree(tmp_dir)
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/support/os_helper.py", line 442, in rmtree
Warning --     _rmtree(path)
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/support/os_helper.py", line 426, in _rmtree
Warning --     _rmtree_inner(path)
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/support/os_helper.py", line 422, in _rmtree_inner
Warning --     _rmtree_inner(fullname)
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/support/os_helper.py", line 422, in _rmtree_inner
Warning --     _rmtree_inner(fullname)
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/support/os_helper.py", line 422, in _rmtree_inner
Warning --     _rmtree_inner(fullname)
Warning --   [Previous line repeated 1 more time]
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/support/os_helper.py", line 423, in _rmtree_inner
Warning --     _force_run(path, os.rmdir, fullname)
Warning --   File "/root/buildarea/3.x.angelico-debian-amd64/build/Lib/test/support/__init__.py", line 214, in _force_run
Warning --     return func(*args)
Warning --            ^^^^^^^^^^^
Warning -- OSError: [Errno 39] Directory not empty: '/tmp/test_python_982lzjpi/tmp30gys4fb/python-installation/lib/python3.13/test'
Kill <TestWorkerProcess #2 running test=test_tokenize pid=1750047 time=19.9 sec> process group

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot ARM Raspbian 3.x has failed when building commit 5f41376.

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/all/#builders/424/builds/4731) and take a look at the build logs.
4. Check if the failure is related to this commit (5f41376) 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/all/#builders/424/builds/4731

Failed tests:

• test.test_concurrent_futures.test_shutdown

Failed subtests:

• test_interpreter_shutdown - test.test_concurrent_futures.test_shutdown.ProcessPoolForkserverProcessPoolShutdownTest.test_interpreter_shutdown

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

== Tests result: FAILURE then FAILURE ==

443 tests OK.

10 slowest tests:

• test_venv: 10 min 28 sec
• test_largefile: 8 min 7 sec
• test.test_multiprocessing_spawn.test_processes: 4 min 40 sec
• test_math: 4 min 35 sec
• test_cppext: 2 min 57 sec
• test_embed: 2 min 55 sec
• test_hashlib: 2 min 14 sec
• test_lzma: 1 min 53 sec
• test_peg_generator: 1 min 49 sec
• test_tarfile: 1 min 47 sec

1 test failed:
test.test_concurrent_futures.test_shutdown

19 tests skipped:
test.test_asyncio.test_windows_events
test.test_asyncio.test_windows_utils test_devpoll test_idle
test_ioctl test_kqueue test_launcher test_perf_profiler
test_startfile test_tcl test_tkinter test_ttk test_ttk_textonly
test_turtle test_winconsoleio test_winreg test_winsound test_wmi
test_zipfile64

1 re-run test:
test.test_concurrent_futures.test_shutdown

Total duration: 41 min 28 sec

Click to see traceback logs

Traceback (most recent call last):
  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/test/test_concurrent_futures/test_shutdown.py", line 49, in test_interpreter_shutdown
    self.assertFalse(err)
AssertionError: b'Exception in thread Thread-1:\nTraceback (most recent call last):\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/threading.py", line 1059, in _bootstrap_inner\n    self.run()\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/concurrent/futures/process.py", line 339, in run\n    self.add_call_item_to_queue()\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/concurrent/futures/process.py", line 394, in add_call_item_to_queue\n    self.call_queue.put(_CallItem(work_id,\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/multiprocessing/queues.py", line 94, in put\n    self._start_thread()\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/multiprocessing/queues.py", line 177, in _start_thread\n    self._thread.start()\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/threading.py", line 978, in start\n    _start_new_thread(self._bootstrap, ())\nRuntimeError: can\'t create new thread at interpreter shutdown\nTraceback (most recent call last):\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/multiprocessing/forkserver.py", line 274, in main\n    code = _serve_one(child_r, fds,\n           ^^^^^^^^^^^^^^^^^^^^^^^^\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/multiprocessing/forkserver.py", line 313, in _serve_one\n    code = spawn._main(child_r, parent_sentinel)\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/multiprocessing/spawn.py", line 132, in _main\n    self = reduction.pickle.load(from_parent)\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File "/var/lib/buildbot/workers/3.x.gps-raspbian.nondebug/build/Lib/multiprocessing/synchronize.py", line 115, in __setstate__\n    self._semlock = _multiprocessing.SemLock._rebuild(*state)\n                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nFileNotFoundError: [Errno 2] No such file or directory\n' is not false