[issue23027] test_warnings fails with -Werror

[Serhiy Storchaka]

New submission from Serhiy Storchaka:

$ ./python -Werror -m test.regrtest -v test_warnings
...
======================================================================
ERROR: test_warning_classes (test.test_warnings.CWarnTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/serhiy/py/cpython/Lib/test/test_warnings.py", line 460, in test_warning_classes
    self.module.warn('good warning category', MyWarningClass)
test.test_warnings.WarnTests.test_warning_classes.<locals>.MyWarningClass: good warning category

======================================================================
ERROR: test_warning_classes (test.test_warnings.PyWarnTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/serhiy/py/cpython/Lib/test/test_warnings.py", line 460, in test_warning_classes
    self.module.warn('good warning category', MyWarningClass)
  File "/home/serhiy/py/cpython/Lib/warnings.py", line 204, in warn
    globals)
  File "/home/serhiy/py/cpython/Lib/warnings.py", line 249, in warn_explicit
    raise message
test.test_warnings.WarnTests.test_warning_classes.<locals>.MyWarningClass: good warning category

----------------------------------------------------------------------

This is 3.x only issue.

----------
components: Tests
messages: 232446
nosy: serhiy.storchaka
priority: normal
severity: normal
status: open
title: test_warnings fails with -Werror
type: behavior
versions: Python 3.4, Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23027>
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