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bpo-37261: Document sys.unraisablehook corner cases (GH-14059)

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Document reference cycle and resurrected objects issues in
sys.unraisablehook() and threading.excepthook() documentation.

Fix test.support.catch_unraisable_exception(): __exit__() no longer
ignores unraisable exceptions.

Fix test_io test_writer_close_error_on_close(): use a second
catch_unraisable_exception() to catch the BufferedWriter unraisable
exception.
This commit is contained in:
Victor Stinner 2019-06-14 18:03:22 +02:00 • committed by GitHub
parent 9765efcb39
commit 212646cae6
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5 changed files with 30 additions and 23 deletions
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6
Lib/test/test_io.py
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@ -2072,8 +2072,12 @@ class BufferedRWPairTest(unittest.TestCase):
writer.close = lambda: None
writer = None
# Ignore BufferedWriter (of the BufferedRWPair) unraisable exception
with support.catch_unraisable_exception():
pair = None
# Ignore BufferedRWPair unraisable exception
with support.catch_unraisable_exception():
pair = None
support.gc_collect()
support.gc_collect()
def test_reader_writer_close_error_on_close(self):