New submission from Oleg Oshmyan <chor...@inbox.lv>:
If a truncated input stream is given to the zlib.decompress function, it raises
a zlib.error. However, if the same stream is fed to a zlib.Decompress object,
no exception is raised during the entire lifetime of the object. Attached is an
example demonstrating the discrepancy.
zlib.decompress raises this exception when it gets a Z_BUF_ERROR from zlib,
while the implementation of zlib.Decompress.decompress just skips every
Z_BUF_ERROR it gets as described in this (apparently inaccurate) comment:
/* We will only get Z_BUF_ERROR if the output buffer was full
but there wasn't more output when we tried again, so it is
not an error condition.
*/
----------
components: Extension Modules
files: zlib-fail.py
messages: 141257
nosy: chortos
priority: normal
severity: normal
status: open
title: zlib.Decompress.decompress/flush do not raise any exceptions when given
truncated input streams
type: behavior
versions: Python 2.7, Python 3.2, Python 3.3
Added file: http://bugs.python.org/file22777/zlib-fail.py
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue12646>
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