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a7427f2db9
The call to `PySequence_List()` could temporarily unlock and relock the
set, allowing the items to be cleared and return the incorrect
notation `{}` for a empty set (it should be `set()`).
Co-authored-by: T. Wouters <thomas@python.org>
41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
import unittest
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from threading import Thread, Barrier
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from unittest import TestCase
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from test.support import threading_helper
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@threading_helper.requires_working_threading()
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class TestSet(TestCase):
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def test_repr_clear(self):
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"""Test repr() of a set while another thread is calling clear()"""
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NUM_ITERS = 10
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NUM_REPR_THREADS = 10
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barrier = Barrier(NUM_REPR_THREADS + 1)
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s = {1, 2, 3, 4, 5, 6, 7, 8}
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def clear_set():
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barrier.wait()
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s.clear()
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def repr_set():
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barrier.wait()
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set_reprs.append(repr(s))
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for _ in range(NUM_ITERS):
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set_reprs = []
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threads = [Thread(target=clear_set)]
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for _ in range(NUM_REPR_THREADS):
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threads.append(Thread(target=repr_set))
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for t in threads:
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t.start()
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for t in threads:
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t.join()
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for set_repr in set_reprs:
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self.assertIn(set_repr, ("set()", "{1, 2, 3, 4, 5, 6, 7, 8}"))
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if __name__ == "__main__":
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unittest.main()
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