AMD64 Windows11 Bigmem 3.x: test_bigmem failed with !_Py_IsImmortal(FROM_GC(gc)) assertion error

build: https://buildbot.python.org/all/#/builders/1079/builds/3327

Error after tests complete, when running gc_collect() C function:

Assertion failed: !_Py_IsImmortal(FROM_GC(gc)), file R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Python\gc.c, line 476

Logs:

R:\buildarea\3.x.ambv-bb-win11.bigmem\build>"R:\buildarea\3.x.ambv-bb-win11.bigmem\build\PCbuild\amd64\python_d.exe"  -m test --fast-ci --slow-ci -M24g -uall --junit-xml test-results.xml -j4 --timeout 4800 
+ 'R:\buildarea\3.x.ambv-bb-win11.bigmem\build\PCbuild\amd64\python_d.exe' -u -W default -bb -E -m test --fast-ci --slow-ci -M24g -uall --junit-xml test-results.xml -j4 --timeout 4800 --dont-add-python-opts
== CPython 3.13.0a3+ (heads/main:bcccf1fb63, Feb 5 2024, 19:52:36) [MSC v.1936 64 bit (AMD64)]
== Windows-11-10.0.22631-SP0 little-endian
== Python build: debug
== cwd: R:\buildarea\3.x.ambv-bb-win11.bigmem\build\build\test_python_worker_3608�
== CPU count: 6
== encodings: locale=cp1252 FS=utf-8
== resources: all

(...)

1:43:02 load avg: 0.04 [2/2/2] test_bigmem worker non-zero exit code (Exit code 3)
Re-running test_bigmem in verbose mode
test_capitalize (test.test_bigmem.BytearrayTest.test_capitalize) ... ok
test_center (test.test_bigmem.BytearrayTest.test_center) ... ok
test_compare (test.test_bigmem.BytearrayTest.test_compare) ... ok
test_concat (test.test_bigmem.BytearrayTest.test_concat) ... ok
test_contains (test.test_bigmem.BytearrayTest.test_contains) ... ok
test_count (test.test_bigmem.BytearrayTest.test_count) ... ok
test_decode (test.test_bigmem.BytearrayTest.test_decode) ... ok
test_endswith (test.test_bigmem.BytearrayTest.test_endswith) ... ok
test_expandtabs (test.test_bigmem.BytearrayTest.test_expandtabs) ... ok
test_find (test.test_bigmem.BytearrayTest.test_find) ... ok
test_index (test.test_bigmem.BytearrayTest.test_index) ... ok
test_isalnum (test.test_bigmem.BytearrayTest.test_isalnum) ... ok
test_isalpha (test.test_bigmem.BytearrayTest.test_isalpha) ... ok
test_isdigit (test.test_bigmem.BytearrayTest.test_isdigit) ... ok
test_islower (test.test_bigmem.BytearrayTest.test_islower) ... ok
test_isspace (test.test_bigmem.BytearrayTest.test_isspace) ... ok
test_istitle (test.test_bigmem.BytearrayTest.test_istitle) ... ok
test_isupper (test.test_bigmem.BytearrayTest.test_isupper) ... ok
test_join (test.test_bigmem.BytearrayTest.test_join) ... ok
test_ljust (test.test_bigmem.BytearrayTest.test_ljust) ... ok
test_lower (test.test_bigmem.BytearrayTest.test_lower) ... ok
test_lstrip (test.test_bigmem.BytearrayTest.test_lstrip) ... ok
test_repeat (test.test_bigmem.BytearrayTest.test_repeat) ... ok
test_replace (test.test_bigmem.BytearrayTest.test_replace) ... ok
test_rfind (test.test_bigmem.BytearrayTest.test_rfind) ... ok
test_rindex (test.test_bigmem.BytearrayTest.test_rindex) ... ok
test_rjust (test.test_bigmem.BytearrayTest.test_rjust) ... ok
test_rstrip (test.test_bigmem.BytearrayTest.test_rstrip) ... ok
test_slice_and_getitem (test.test_bigmem.BytearrayTest.test_slice_and_getitem) ... ok
test_split_small (test.test_bigmem.BytearrayTest.test_split_small) ... ok
test_splitlines (test.test_bigmem.BytearrayTest.test_splitlines) ... ok
test_startswith (test.test_bigmem.BytearrayTest.test_startswith) ... ok
test_strip (test.test_bigmem.BytearrayTest.test_strip) ... ok
test_swapcase (test.test_bigmem.BytearrayTest.test_swapcase) ... ok
test_title (test.test_bigmem.BytearrayTest.test_title) ... ok
test_translate (test.test_bigmem.BytearrayTest.test_translate) ... ok
test_upper (test.test_bigmem.BytearrayTest.test_upper) ... ok
test_zfill (test.test_bigmem.BytearrayTest.test_zfill) ... ok
test_capitalize (test.test_bigmem.BytesTest.test_capitalize) ... ok
test_center (test.test_bigmem.BytesTest.test_center) ... ok
test_compare (test.test_bigmem.BytesTest.test_compare) ... ok
test_concat (test.test_bigmem.BytesTest.test_concat) ... ok
test_contains (test.test_bigmem.BytesTest.test_contains) ... ok
test_count (test.test_bigmem.BytesTest.test_count) ... ok
test_decode (test.test_bigmem.BytesTest.test_decode) ... ok
test_endswith (test.test_bigmem.BytesTest.test_endswith) ... ok
test_expandtabs (test.test_bigmem.BytesTest.test_expandtabs) ... ok
test_find (test.test_bigmem.BytesTest.test_find) ... ok
test_hash (test.test_bigmem.BytesTest.test_hash) ... ok
test_index (test.test_bigmem.BytesTest.test_index) ... ok
test_isalnum (test.test_bigmem.BytesTest.test_isalnum) ... ok
test_isalpha (test.test_bigmem.BytesTest.test_isalpha) ... ok
test_isdigit (test.test_bigmem.BytesTest.test_isdigit) ... ok
test_islower (test.test_bigmem.BytesTest.test_islower) ... ok
test_isspace (test.test_bigmem.BytesTest.test_isspace) ... ok
test_istitle (test.test_bigmem.BytesTest.test_istitle) ... ok
test_isupper (test.test_bigmem.BytesTest.test_isupper) ... ok
test_join (test.test_bigmem.BytesTest.test_join) ... ok
test_ljust (test.test_bigmem.BytesTest.test_ljust) ... ok
test_lower (test.test_bigmem.BytesTest.test_lower) ... ok
test_lstrip (test.test_bigmem.BytesTest.test_lstrip) ... ok
test_repeat (test.test_bigmem.BytesTest.test_repeat) ... ok
test_replace (test.test_bigmem.BytesTest.test_replace) ... ok
test_rfind (test.test_bigmem.BytesTest.test_rfind) ... ok
test_rindex (test.test_bigmem.BytesTest.test_rindex) ... ok
test_rjust (test.test_bigmem.BytesTest.test_rjust) ... ok
test_rstrip (test.test_bigmem.BytesTest.test_rstrip) ... ok
test_slice_and_getitem (test.test_bigmem.BytesTest.test_slice_and_getitem) ... ok
test_split_large (test.test_bigmem.BytesTest.test_split_large) ... ok
test_split_small (test.test_bigmem.BytesTest.test_split_small) ... ok
test_splitlines (test.test_bigmem.BytesTest.test_splitlines) ... ok
test_startswith (test.test_bigmem.BytesTest.test_startswith) ... ok
test_strip (test.test_bigmem.BytesTest.test_strip) ... ok
test_swapcase (test.test_bigmem.BytesTest.test_swapcase) ... ok
test_title (test.test_bigmem.BytesTest.test_title) ... ok
test_translate (test.test_bigmem.BytesTest.test_translate) ... ok
test_upper (test.test_bigmem.BytesTest.test_upper) ... ok
test_zfill (test.test_bigmem.BytesTest.test_zfill) ... ok
test_dict (test.test_bigmem.DictTest.test_dict) ... skipped 'not enough memory: 53.3G minimum needed'
test_append (test.test_bigmem.ListTest.test_append) ... ok
test_compare (test.test_bigmem.ListTest.test_compare) ... skipped 'not enough memory: 32.0G minimum needed'
test_concat_large (test.test_bigmem.ListTest.test_concat_large) ... skipped 'not enough memory: 48.0G minimum needed'
test_concat_small (test.test_bigmem.ListTest.test_concat_small) ... skipped 'not enough memory: 24.0G minimum needed'
test_contains (test.test_bigmem.ListTest.test_contains) ... ok
test_count (test.test_bigmem.ListTest.test_count) ... ok
test_extend_large (test.test_bigmem.ListTest.test_extend_large) ... skipped 'not enough memory: 36.0G minimum needed'
test_extend_small (test.test_bigmem.ListTest.test_extend_small) ... ok
test_hash (test.test_bigmem.ListTest.test_hash) ... ok
test_index (test.test_bigmem.ListTest.test_index) ... ok
test_index_and_slice (test.test_bigmem.ListTest.test_index_and_slice) ... ok
test_inplace_concat_large (test.test_bigmem.ListTest.test_inplace_concat_large) ... skipped 'not enough memory: 36.0G minimum needed'
test_inplace_concat_small (test.test_bigmem.ListTest.test_inplace_concat_small) ... ok
test_inplace_repeat_large (test.test_bigmem.ListTest.test_inplace_repeat_large) ... skipped 'not enough memory: 36.0G minimum needed'
test_inplace_repeat_small (test.test_bigmem.ListTest.test_inplace_repeat_small) ... ok
test_insert (test.test_bigmem.ListTest.test_insert) ... ok
test_pop (test.test_bigmem.ListTest.test_pop) ... ok
test_remove (test.test_bigmem.ListTest.test_remove) ... ok
test_repeat_large (test.test_bigmem.ListTest.test_repeat_large) ... skipped 'not enough memory: 48.0G minimum needed'
test_repeat_small (test.test_bigmem.ListTest.test_repeat_small) ... skipped 'not enough memory: 24.0G minimum needed'
test_repr_large (test.test_bigmem.ListTest.test_repr_large) ... skipped 'not enough memory: 30.0G minimum needed'
test_repr_small (test.test_bigmem.ListTest.test_repr_small) ... ok
test_reverse (test.test_bigmem.ListTest.test_reverse) ... ok
test_sort (test.test_bigmem.ListTest.test_sort) ... skipped 'not enough memory: 24.0G minimum needed'
test_capitalize (test.test_bigmem.StrTest.test_capitalize) ... skipped 'not enough memory: 28.0G minimum needed'
test_center (test.test_bigmem.StrTest.test_center) ... ok
test_compare (test.test_bigmem.StrTest.test_compare) ... ok
test_concat (test.test_bigmem.StrTest.test_concat) ... ok
test_contains (test.test_bigmem.StrTest.test_contains) ... ok
test_count (test.test_bigmem.StrTest.test_count) ... ok
test_encode (test.test_bigmem.StrTest.test_encode) ... ok
test_encode_ascii (test.test_bigmem.StrTest.test_encode_ascii) ... ok
test_encode_raw_unicode_escape (test.test_bigmem.StrTest.test_encode_raw_unicode_escape) ... ok
test_encode_utf32 (test.test_bigmem.StrTest.test_encode_utf32) ... ok
test_encode_utf7 (test.test_bigmem.StrTest.test_encode_utf7) ... ok
test_endswith (test.test_bigmem.StrTest.test_endswith) ... ok
test_expandtabs (test.test_bigmem.StrTest.test_expandtabs) ... ok
test_find (test.test_bigmem.StrTest.test_find) ... ok
test_format (test.test_bigmem.StrTest.test_format) ... ok
test_hash (test.test_bigmem.StrTest.test_hash) ... ok
test_index (test.test_bigmem.StrTest.test_index) ... ok
test_isalnum (test.test_bigmem.StrTest.test_isalnum) ... ok
test_isalpha (test.test_bigmem.StrTest.test_isalpha) ... ok
test_isdigit (test.test_bigmem.StrTest.test_isdigit) ... ok
test_islower (test.test_bigmem.StrTest.test_islower) ... ok
test_isspace (test.test_bigmem.StrTest.test_isspace) ... ok
test_istitle (test.test_bigmem.StrTest.test_istitle) ... ok
test_isupper (test.test_bigmem.StrTest.test_isupper) ... ok
test_join (test.test_bigmem.StrTest.test_join) ... ok
test_ljust (test.test_bigmem.StrTest.test_ljust) ... ok
test_lower (test.test_bigmem.StrTest.test_lower) ... ok
test_lstrip (test.test_bigmem.StrTest.test_lstrip) ... ok
test_repeat (test.test_bigmem.StrTest.test_repeat) ... ok
test_replace (test.test_bigmem.StrTest.test_replace) ... ok
test_repr_large (test.test_bigmem.StrTest.test_repr_large) ... ok
test_repr_small (test.test_bigmem.StrTest.test_repr_small) ... ok
test_rfind (test.test_bigmem.StrTest.test_rfind) ... ok
test_rindex (test.test_bigmem.StrTest.test_rindex) ... ok
test_rjust (test.test_bigmem.StrTest.test_rjust) ... ok
test_rstrip (test.test_bigmem.StrTest.test_rstrip) ... ok
test_slice_and_getitem (test.test_bigmem.StrTest.test_slice_and_getitem) ... ok
test_split_large (test.test_bigmem.StrTest.test_split_large) ... ok
test_split_small (test.test_bigmem.StrTest.test_split_small) ... ok
test_splitlines (test.test_bigmem.StrTest.test_splitlines) ... ok
test_startswith (test.test_bigmem.StrTest.test_startswith) ... ok
test_strip (test.test_bigmem.StrTest.test_strip) ... ok
test_swapcase (test.test_bigmem.StrTest.test_swapcase) ... skipped 'not enough memory: 28.0G minimum needed'
test_title (test.test_bigmem.StrTest.test_title) ... skipped 'not enough memory: 28.0G minimum needed'
test_translate (test.test_bigmem.StrTest.test_translate) ... ok
test_unicode_repr (test.test_bigmem.StrTest.test_unicode_repr) ... ok
test_unicode_repr_wide (test.test_bigmem.StrTest.test_unicode_repr_wide) ... ok
test_upper (test.test_bigmem.StrTest.test_upper) ... ok
test_zfill (test.test_bigmem.StrTest.test_zfill) ... ok
test_compare (test.test_bigmem.TupleTest.test_compare) ... skipped 'not enough memory: 32.0G minimum needed'
test_concat_large (test.test_bigmem.TupleTest.test_concat_large) ... skipped 'not enough memory: 48.0G minimum needed'
test_concat_small (test.test_bigmem.TupleTest.test_concat_small) ... skipped 'not enough memory: 24.0G minimum needed'
test_contains (test.test_bigmem.TupleTest.test_contains) ... ok
test_from_2G_generator (test.test_bigmem.TupleTest.test_from_2G_generator) ... ok
test_from_almost_2G_generator (test.test_bigmem.TupleTest.test_from_almost_2G_generator) ... ok
test_hash (test.test_bigmem.TupleTest.test_hash) ... ok
test_index_and_slice (test.test_bigmem.TupleTest.test_index_and_slice) ... ok
test_repeat_large (test.test_bigmem.TupleTest.test_repeat_large) ... skipped 'not enough memory: 48.0G minimum needed'
test_repeat_large_2 (test.test_bigmem.TupleTest.test_repeat_large_2) ... ok
test_repeat_small (test.test_bigmem.TupleTest.test_repeat_small) ... skipped 'not enough memory: 24.0G minimum needed'
test_repr_large (test.test_bigmem.TupleTest.test_repr_large) ... skipped 'not enough memory: 30.0G minimum needed'
test_repr_small (test.test_bigmem.TupleTest.test_repr_small) ... ok

----------------------------------------------------------------------
Ran 165 tests in 2954.633s

OK (skipped=20)

Assertion failed: !_Py_IsImmortal(FROM_GC(gc)), file R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Python\gc.c, line 476
Fatal Python error: Aborted

Current thread 0x00000c1c (most recent call first):
  Garbage-collecting
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\test\support\__init__.py", line 776 in gc_collect
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\test\libregrtest\single.py", line 141 in _load_run_test
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\test\libregrtest\single.py", line 178 in _runtest_env_changed_exc
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\test\libregrtest\single.py", line 278 in _runtest
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\test\libregrtest\single.py", line 306 in run_single_test
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\test\libregrtest\worker.py", line 91 in worker_process
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\test\libregrtest\worker.py", line 126 in main
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\test\libregrtest\worker.py", line 130 in <module>
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\runpy.py", line 88 in _run_code
  File "R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Lib\runpy.py", line 198 in _run_module_as_main

Extension modules: _testcapi, _wmi (total: 2)

(...)

2 tests failed:
    test.test_multiprocessing_spawn.test_processes test_bigmem

426 tests OK.

EDIT: I created issue gh-115127 for the test_multiprocessing_spawn error.

Linked PRs

gh-115124: Use _PyObject_ASSERT() in gc.c #115125

pythongh-115124: Use _PyObject_ASSERT() in gc.c

See also issue gh-115122: "regrtest: add --bisect option to run test.bisect_cmd on failed tests".

@ambv

@ambv message on Discord:

Note: the bigmem buildbot caught an assertion failure in GC

Started with https://buildbot.python.org/all/#/builders/1079/builds/3327
Latest failure: https://buildbot.python.org/all/#/builders/1079/builds/3333

Assertion failed: !_Py_IsImmortal(FROM_GC(gc)), file R:\buildarea\3.x.ambv-bb-win11.bigmem\build\Python\gc.c, line 476

I'll be disabling bigmem on 3.12 as at this point it's unlikely to catch anything new in 3.12. So we'll have less waiting for the buildbot on main.

Started with https://buildbot.python.org/all/#/builders/1079/builds/3327

This build contains two changes:

See also issue gh-115127: multiprocessing test_thread_safety() fails with "gc_list_is_empty(to) || gc_old_space(to_tail) == gc_old_space(from_tail)" assert error.

This was #108362

pythongh-115124: Use _PyObject_ASSERT() in gc.c

gh-115124: Use _PyObject_ASSERT() in gc.c (#115125)

pythongh-115124: Use _PyObject_ASSERT() in gc.c (python#115125)

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AMD64 Windows11 Bigmem 3.x: test_bigmem failed with !_Py_IsImmortal(FROM_GC(gc)) assertion error #115124

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AMD64 Windows11 Bigmem 3.x: test_bigmem failed with !_Py_IsImmortal(FROM_GC(gc)) assertion error #115124

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vstinner commented on Feb 7, 2024

vstinner commented on Feb 7, 2024

vstinner commented on Feb 7, 2024

vstinner commented on Feb 7, 2024

encukou commented on Feb 7, 2024

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