Roundup Robot devn...@psf.upfronthosting.co.za added the comment:
New changeset 5330af45f777 by Antoine Pitrou in branch '3.2':
Issue #12213: Fix a buffering bug with interleaved reads and writes that
http://hg.python.org/cpython/rev/5330af45f777
New changeset d7f6391954cf by Antoine Pitrou in
STINNER Victor victor.stin...@haypocalc.com added the comment:
You should not use BufferedRWPair with the same underlying stream (that's the
whole point of BufferedRWPair).
It might be documented. Something like Warning: don't use the same
stream as reader and writer, or the BufferedRWPair
Roundup Robot devn...@psf.upfronthosting.co.za added the comment:
New changeset cf2010e9f941 by Antoine Pitrou in branch '2.7':
Issue #12213: Fix a buffering bug with interleaved reads and writes that
http://hg.python.org/cpython/rev/cf2010e9f941
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Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com:
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title: BufferedRandom, BufferedRWPair: issues with interlaced read-write -
BufferedRandom, BufferedRWPair: issues with interlaced read-write
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Python tracker
Antoine Pitrou pit...@free.fr added the comment:
I think your expectations for BufferedRWPair are wrong. You should not use
BufferedRWPair with the same underlying stream (that's the whole point of
BufferedRWPair).
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Python tracker
Antoine Pitrou pit...@free.fr added the comment:
Here is a patch.
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stage: - patch review
Added file: http://bugs.python.org/file22950/bufrandom.patch
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Python tracker rep...@bugs.python.org
http://bugs.python.org/issue12213
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com:
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nosy: +Arfrever
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Python tracker rep...@bugs.python.org
http://bugs.python.org/issue12213
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Changes by Antoine Pitrou pit...@free.fr:
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priority: normal - critical
type: - behavior
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Python tracker rep...@bugs.python.org
http://bugs.python.org/issue12213
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STINNER Victor victor.stin...@haypocalc.com added the comment:
My patch tries to fix interlaced read-write by always calling flush(),
Why do you need to call flush()? Can't you read from the buffer?
Hum, my patch does not always call flush of the reader and the writer. On read,
it flushs
Changes by Santoso Wijaya santoso.wij...@gmail.com:
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nosy: +santa4nt
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Python tracker rep...@bugs.python.org
http://bugs.python.org/issue12213
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Antoine Pitrou pit...@free.fr added the comment:
My patch tries to fix interlaced read-write by always calling flush(),
Why do you need to call flush()? Can't you read from the buffer?
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Python tracker rep...@bugs.python.org
Changes by STINNER Victor victor.stin...@haypocalc.com:
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title: BufferedRandom: write(); read() gives different result using io and
_pyio - BufferedRandom, BufferedRWPair: issues with interlaced read-write
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Python tracker rep...@bugs.python.org
STINNER Victor victor.stin...@haypocalc.com added the comment:
io_interlaced_read_write.patch:
- add interlaced read/write tests for BufferedRandom and BufferedRWPair
- _pyio: move undo readahead code into BufferedReader.flush()
- io: BufferedRandom.flush() doesn't undo readahead if the write
STINNER Victor victor.stin...@haypocalc.com added the comment:
See also issue #12215: TextIOWrapper has also issues on interlaced read-write.
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Python tracker rep...@bugs.python.org
http://bugs.python.org/issue12213
Changes by STINNER Victor victor.stin...@haypocalc.com:
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versions: +Python 2.7, Python 3.2
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Python tracker rep...@bugs.python.org
http://bugs.python.org/issue12213
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