Example: https://buildbot.python.org/#/builders/1636/builds/305/steps/6/logs/stdio ``` test_var_counts (test.test_code.CodeTest.test_var_counts) ... Fatal Python error: Segmentation fault Current thread 0x000003ffb3d77740 [python] (most recent call first): File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/test_code.py", line 974 in test_var_counts File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/unittest/case.py", line 615 in _callTestMethod File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/unittest/case.py", line 669 in run File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/unittest/case.py", line 725 in __call__ File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/unittest/suite.py", line 122 in run File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/unittest/suite.py", line 84 in __call__ File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/unittest/suite.py", line 122 in run File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/unittest/suite.py", line 84 in __call__ File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/unittest/runner.py", line 259 in run File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/single.py", line 84 in _run_suite File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/single.py", line 42 in run_unittest File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/single.py", line 162 in test_func File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/single.py", line 118 in regrtest_runner File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/single.py", line 165 in _load_run_test File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/single.py", line 210 in _runtest_env_changed_exc File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/single.py", line 319 in _runtest File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/single.py", line 348 in run_single_test File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/worker.py", line 92 in worker_process File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/worker.py", line 127 in main File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/test/libregrtest/worker.py", line 131 in <module> File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/runpy.py", line 88 in _run_code File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/Lib/runpy.py", line 198 in _run_module_as_main Current thread's C stack trace (most recent call first): Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python", at _Py_DumpStack+0x2e [0x12be1e6] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x12d237e] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x12d2698] Binary file "linux-vdso64.so.1", at __kernel_sigreturn+0x0 [0x3ffdc4fe4d8] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x127e454] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10bb114] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python", at _PyCode_SetUnboundVarCounts+0xbe [0x10be136] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/build/lib.linux-s390x-3.14/_testinternalcapi.cpython-314d-s390x-linux-gnu.so", at +0x9826 [0x3ffa5109826] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x1113148] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python", at _PyObject_MakeTpCall+0xb4 [0x10b4a1c] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b4c44] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python", at PyObject_Vectorcall+0x42 [0x10b4cda] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python", at _PyEval_EvalFrameDefault+0x4862 [0x1202372] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x1222c84] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x1222e96] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b4876] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b7d18] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b7e86] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b60aa] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b639a] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python", at PyObject_Call+0x3e [0x10b63f6] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python", at _PyEval_EvalFrameDefault+0x763a [0x120514a] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x1222c84] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x1222e96] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b4876] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b5dba] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b5fb6] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x1159664] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x1159768] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python", at _PyObject_MakeTpCall+0xb4 [0x10b4a1c] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python" [0x10b4c44] Binary file "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-s390x/build/python", at PyObject_Vectorcall+0x42 [0x10b4cda] <truncated rest of calls> Extension modules: _testinternalcapi, _testcapi (total: 2) ``` Refs https://github.com/python/cpython/pull/133128 CC @ericsnowcurrently