diff options
Diffstat (limited to 'Lib/test/test_threading.py')
| -rw-r--r-- | Lib/test/test_threading.py | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py index f7c3680bda..6e1ae06f79 100644 --- a/Lib/test/test_threading.py +++ b/Lib/test/test_threading.py @@ -547,6 +547,35 @@ class ThreadTests(BaseTestCase): self.assertEqual(err, b"") self.assertEqual(data, "Thread-1\nTrue\nTrue\n") + def test_main_thread_during_shutdown(self): + # bpo-31516: current_thread() should still point to the main thread + # at shutdown + code = """if 1: + import gc, threading + + main_thread = threading.current_thread() + assert main_thread is threading.main_thread() # sanity check + + class RefCycle: + def __init__(self): + self.cycle = self + + def __del__(self): + print("GC:", + threading.current_thread() is main_thread, + threading.main_thread() is main_thread, + threading.enumerate() == [main_thread]) + + RefCycle() + gc.collect() # sanity check + x = RefCycle() + """ + _, out, err = assert_python_ok("-c", code) + data = out.decode() + self.assertEqual(err, b"") + self.assertEqual(data.splitlines(), + ["GC: True True True"] * 2) + def test_tstate_lock(self): # Test an implementation detail of Thread objects. started = _thread.allocate_lock() |