test_io logs Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0> warnings

@vstinner

BPO	37223
Nosy	@vstinner
PRs	bpo-37223: test_io: silence destructor errors #13954 bpo-37223: io.BufferedWrite.close() don't call flush() if already closed #13999 bpo-37223: Second call to BufferedWrite.close() does nothing #14028 bpo-37223, test_io: silence last 'Exception ignored in:' #14029 [3.8] bpo-37223: test_io: silence destructor errors #14031

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2019-06-12.22:24:34.107>
created_at = <Date 2019-06-10.23:45:19.834>
labels = ['3.8', 'tests', '3.9']
title = 'test_io logs Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0> warnings'
updated_at = <Date 2019-06-12.22:24:34.107>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2019-06-12.22:24:34.107>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2019-06-12.22:24:34.107>
closer = 'vstinner'
components = ['Tests']
creation = <Date 2019-06-10.23:45:19.834>
creator = 'vstinner'
dependencies = []
files = []
hgrepos = []
issue_num = 37223
keywords = ['patch']
message_count = 10.0
messages = ['345156', '345158', '345159', '345161', '345165', '345166', '345298', '345416', '345421', '345423']
nosy_count = 1.0
nosy_names = ['vstinner']
pr_nums = ['13954', '13999', '14028', '14029', '14031']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue37223'
versions = ['Python 3.8', 'Python 3.9']

bpo-18748 modified io.IOBase finalizer to no longer silence close() exception in develoment and in debug mode.

The commit 472f794 fixed a few destructor errors in test_io, but there are still a few:

test_uninitialized (test.test_io.PyBufferedReaderTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 814, in close
    if self.raw is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 836, in raw
    return self._raw
AttributeError: 'BufferedReader' object has no attribute '_raw'
ok

test_max_buffer_size_removal (test.test_io.PyBufferedWriterTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1299, in close
    with self._write_lock:
AttributeError: 'BufferedWriter' object has no attribute '_write_lock'
ok

test_misbehaved_io (test.test_io.PyBufferedWriterTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1308, in close
    self.flush()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1269, in flush
    self._flush_unlocked()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1285, in _flush_unlocked
    raise OSError("write() returned incorrect number of bytes")
OSError: write() returned incorrect number of bytes
ok

test_uninitialized (test.test_io.PyBufferedWriterTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1299, in close
    with self._write_lock:
AttributeError: 'BufferedWriter' object has no attribute '_write_lock'
ok

test_writer_close_error_on_close (test.test_io.CBufferedRWPairTest) ...
Exception ignored in: <_io.BufferedWriter>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/unittest/case.py", line 611, in _callTestMethod
    method()
ValueError: flush of closed file
ok

test_constructor_max_buffer_size_removal (test.test_io.PyBufferedRWPairTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1377, in close
    self.reader.close()
AttributeError: 'BufferedRWPair' object has no attribute 'reader'
ok

test_constructor_with_not_readable (test.test_io.PyBufferedRWPairTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1377, in close
    self.reader.close()
AttributeError: 'BufferedRWPair' object has no attribute 'reader'
ok

test_constructor_with_not_writeable (test.test_io.PyBufferedRWPairTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1377, in close
    self.reader.close()
AttributeError: 'BufferedRWPair' object has no attribute 'reader'
ok

test_isatty (test.test_io.PyBufferedRWPairTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1377, in close
    self.reader.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 814, in close
    if self.raw is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 814, in close
    if self.raw is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1300, in close
    if self.raw is None or self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1377, in close
    self.reader.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 814, in close
    if self.raw is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 814, in close
    if self.raw is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1300, in close
    if self.raw is None or self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1377, in close
    self.reader.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 814, in close
    if self.raw is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 814, in close
    if self.raw is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1300, in close
    if self.raw is None or self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1377, in close
    self.reader.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 814, in close
    if self.raw is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 814, in close
    if self.raw is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1300, in close
    if self.raw is None or self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'SelectableIsAtty' object has no attribute 'closed'
ok

test_uninitialized (test.test_io.PyBufferedRWPairTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1377, in close
    self.reader.close()
AttributeError: 'BufferedRWPair' object has no attribute 'reader'
ok

test_destructor (test.test_io.CBufferedRandomTest) ...
Exception ignored in: <_io.BufferedRWPair object at 0x7f2f3c5842f0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/test/support/__init__.py", line 1627, in gc_collect
    gc.collect()
ValueError: flush of closed file

Exception ignored in: <_io.BufferedWriter>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/test/support/__init__.py", line 1627, in gc_collect
    gc.collect()
ValueError: flush of closed file
ok

test_misbehaved_io (test.test_io.CBufferedRandomTest) ...
Exception ignored in: <_io.BufferedRandom>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/test/test_io.py", line 2306, in test_misbehaved_io
    BufferedReaderTest.test_misbehaved_io(self)
OSError: Raw stream returned invalid position -123

Exception ignored in: <_io.BufferedRandom>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/test/test_io.py", line 2307, in test_misbehaved_io
    BufferedWriterTest.test_misbehaved_io(self)
OSError: Raw stream returned invalid position -123
ok

test_write_non_blocking (test.test_io.CBufferedRandomTest) ...
Exception ignored in: <_io.BufferedRandom>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/unittest/case.py", line 611, in _callTestMethod
    method()
io.UnsupportedOperation: seek
ok

test_max_buffer_size_removal (test.test_io.PyBufferedRandomTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1299, in close
    with self._write_lock:
AttributeError: 'BufferedRandom' object has no attribute '_write_lock'
ok

test_misbehaved_io (test.test_io.PyBufferedRandomTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1308, in close
    self.flush()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1269, in flush
    self._flush_unlocked()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1285, in _flush_unlocked
    raise OSError("write() returned incorrect number of bytes")
OSError: write() returned incorrect number of bytes
ok

test_uninitialized (test.test_io.PyBufferedRandomTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1299, in close
    with self._write_lock:
AttributeError: 'BufferedRandom' object has no attribute '_write_lock'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 1299, in close
    with self._write_lock:
AttributeError: 'BufferedRandom' object has no attribute '_write_lock'
ok

test_destructor (test.test_io.PyTextIOWrapperTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/test/test_io.py", line 2817, in close
    l.append(self.getvalue())
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 896, in getvalue
    raise ValueError("getvalue on closed file")
ValueError: getvalue on closed file
ok

test_issue22849 (test.test_io.PyTextIOWrapperTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'

Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
AttributeError: 'F' object has no attribute 'closed'
ok

test_repr (test.test_io.PyTextIOWrapperTest) ...
Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 409, in __del__
    self.close()
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2161, in close
    if self.buffer is not None and not self.closed:
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 2169, in closed
    return self.buffer.closed
  File "/home/vstinner/prog/python/master/Lib/_pyio.py", line 840, in closed
    return self.raw.closed
AttributeError: 'NoneType' object has no attribute 'closed'
ok

List of failing tests:

test.test_io.CBufferedRWPairTest.test_writer_close_error_on_close
test.test_io.CBufferedRandomTest.test_destructor
test.test_io.CBufferedRandomTest.test_misbehaved_io
test.test_io.CBufferedRandomTest.test_write_non_blocking
test.test_io.PyBufferedRWPairTest.test_constructor_max_buffer_size_removal
test.test_io.PyBufferedRWPairTest.test_constructor_with_not_readable
test.test_io.PyBufferedRWPairTest.test_constructor_with_not_writeable
test.test_io.PyBufferedRWPairTest.test_isatty
test.test_io.PyBufferedRWPairTest.test_uninitialized
test.test_io.PyBufferedRandomTest.test_max_buffer_size_removal
test.test_io.PyBufferedRandomTest.test_misbehaved_io
test.test_io.PyBufferedRandomTest.test_uninitialized
test.test_io.PyBufferedReaderTest.test_uninitialized
test.test_io.PyBufferedWriterTest.test_max_buffer_size_removal
test.test_io.PyBufferedWriterTest.test_misbehaved_io
test.test_io.PyBufferedWriterTest.test_uninitialized
test.test_io.PyTextIOWrapperTest.test_destructor
test.test_io.PyTextIOWrapperTest.test_issue22849
test.test_io.PyTextIOWrapperTest.test_repr

See also bpo-36918 (test_urllib) and bpo-37069 (regrtest: log unraisable exceptions and uncaught thread exceptions).

PR 13952 fix many errors, but not of all them.

test_io.PyBufferedWriterTest.test_misbehaved_io() logs a warning, whereas test_io.CBufferedWriterTest.test_misbehaved_io() doesn't. It seems like _pyio.BufferedWriter lacks bpo-32228 fix.

Extract of the C implementation:

static PyObject *
_bufferedwriter_flush_unlocked(buffered *self)
{
...

if (!VALID_WRITE_BUFFER(self) || self->write_pos == self->write_end)
    goto end;

    /* First, rewind */
    rewind = RAW_OFFSET(self) + (self->pos - self->write_pos);
    if (rewind != 0) {
        n = _buffered_raw_seek(self, -rewind, 1);
        if (n < 0) {
            goto error;
        }
        self->raw_pos -= rewind;
    }
    ...

end:
/* This ensures that after return from this function,
VALID_WRITE_BUFFER(self) returns false.

   This is a required condition because when a tell() is called
   after flushing and if VALID_READ_BUFFER(self) is false, we need
   VALID_WRITE_BUFFER(self) to be false to have
   RAW_OFFSET(self) == 0.

       Issue: https://bugs.python.org/issue32228 */
    _bufferedwriter_reset_buf(self);
    Py_RETURN_NONE;

error:
    return NULL;
}

New changeset 4f6f7c5 by Victor Stinner in branch 'master':
bpo-18748: Fix _pyio.IOBase destructor (closed case) (GH-13952)
4f6f7c5

New changeset b589cef by Victor Stinner in branch 'master':
bpo-37223: test_io: silence destructor errors (GH-13954)
b589cef

Once bpo-36918 will be fixed, I will backport changes to Python 3.8.

Oh. There are still 3 errors in 2 tests:

test_writer_close_error_on_close (test.test_io.CBufferedRWPairTest) ... Exception ignored in: <_io.BufferedWriter>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/unittest/case.py", line 611, in _callTestMethod
    method()
ValueError: flush of closed file
ok

test_destructor (test.test_io.CBufferedRandomTest) ... Exception ignored in: <_io.BufferedRWPair object at 0x7fc9d1c230b0>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/test/support/__init__.py", line 1627, in gc_collect
    gc.collect()
ValueError: flush of closed file
Exception ignored in: <_io.BufferedWriter>
Traceback (most recent call last):
  File "/home/vstinner/prog/python/master/Lib/test/support/__init__.py", line 1627, in gc_collect
    gc.collect()
ValueError: flush of closed file
ok

New changeset 913fa1c by Victor Stinner in branch 'master':
bpo-37223, test_io: silence last 'Exception ignored in:' (GH-14029)
913fa1c

New changeset c15a682 by Victor Stinner in branch '3.8':
bpo-37223: test_io: silence destructor errors (GH-14031)
c15a682

Ok, all errors have been fixed in 3.8 and master. I close the issue.

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test_io logs Exception ignored in: <function IOBase.del at 0x7f2f3c73e4b0> warnings #81404

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test_io logs Exception ignored in: <function IOBase.__del__ at 0x7f2f3c73e4b0> warnings #81404

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vstinner commented on Jun 10, 2019

vstinner commented on Jun 10, 2019

vstinner commented on Jun 11, 2019

vstinner commented on Jun 11, 2019

vstinner commented on Jun 11, 2019

vstinner commented on Jun 11, 2019

vstinner commented on Jun 12, 2019

vstinner commented on Jun 12, 2019

vstinner commented on Jun 12, 2019

vstinner commented on Jun 12, 2019

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test_io logs Exception ignored in: <function IOBase.del at 0x7f2f3c73e4b0> warnings #81404