https://github.com/python/cpython/commit/dc00dcfe88f9d764e0ad41adc5ffeedd0e34a073 commit: dc00dcfe88f9d764e0ad41adc5ffeedd0e34a073 branch: 3.14 author: Miss Islington (bot) <[email protected]> committer: gpshead <[email protected]> date: 2025-11-11T19:53:31Z summary:
[3.14] gh-140193: Forward port test_exec_set_nomemory_hang from 3.13 (GH-140187) (#141420) gh-140193: Forward port test_exec_set_nomemory_hang from 3.13 (GH-140187) * chore: test_exec_set_nomemory_hang from 3.13 * fix: apply comments * Update Lib/test/test_exceptions.py * Update Lib/test/test_exceptions.py * fix: windows too long name 60 times is enough --------- (cherry picked from commit 0f09bda643d778fb20fb79fecdfd09f20f9d9717) Signed-off-by: yihong0618 <[email protected]> Co-authored-by: yihong <[email protected]> Co-authored-by: Peter Bierma <[email protected]> files: M Lib/test/test_exceptions.py diff --git a/Lib/test/test_exceptions.py b/Lib/test/test_exceptions.py index 273f73937183b8..4f5ffe66eaf585 100644 --- a/Lib/test/test_exceptions.py +++ b/Lib/test/test_exceptions.py @@ -1914,6 +1914,39 @@ def test_keyerror_context(self): exc2 = None + @cpython_only + # Python built with Py_TRACE_REFS fail with a fatal error in + # _PyRefchain_Trace() on memory allocation error. + @unittest.skipIf(support.Py_TRACE_REFS, 'cannot test Py_TRACE_REFS build') + def test_exec_set_nomemory_hang(self): + import_module("_testcapi") + # gh-134163: A MemoryError inside code that was wrapped by a try/except + # block would lead to an infinite loop. + + # The frame_lasti needs to be greater than 257 to prevent + # PyLong_FromLong() from returning cached integers, which + # don't require a memory allocation. Prepend some dummy code + # to artificially increase the instruction index. + warmup_code = "a = list(range(0, 1))\n" * 60 + user_input = warmup_code + dedent(""" + try: + import _testcapi + _testcapi.set_nomemory(0) + b = list(range(1000, 2000)) + except Exception as e: + import traceback + traceback.print_exc() + """) + with SuppressCrashReport(): + with script_helper.spawn_python('-c', user_input) as p: + p.wait() + output = p.stdout.read() + + self.assertIn(p.returncode, (0, 1)) + self.assertGreater(len(output), 0) # At minimum, should not hang + self.assertIn(b"MemoryError", output) + + class NameErrorTests(unittest.TestCase): def test_name_error_has_name(self): try: _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
