[New-bugs-announce] [issue18383] test_warnings modifies warnings.filters when running with "-W default"

[Florent Xicluna]

New submission from Florent Xicluna:

Running the test suite with -Wd, we got the warning:

[247/375] test_warnings
Warning -- warnings.filters was modified by test_warnings



This is how to reproduce:

./python -Wd

import warnings
from test import support

saved = warnings.filters.copy()

c_warnings = support.import_fresh_module('warnings', fresh=['_warnings'])

saved == warnings.filters
# --> False

----------
components: Tests
messages: 192441
nosy: flox
priority: low
severity: normal
stage: needs patch
status: open
title: test_warnings modifies warnings.filters when running with "-W default"
type: behavior
versions: Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18383>
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