test_threading.test_6_daemon_threads(): Assertion failed: PyUnicode_Check(*filename), file ..\Python\_warnings.c, line 501

[vstinner]

BPO	12467
Nosy	@pitrou, @vstinner
Files	warn_unicode.patch test_warn_assert.py

^{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 2011-07-04.09:21:09.951>
created_at = <Date 2011-07-01.13:21:22.884>
labels = ['tests', 'library', 'OS-windows', 'type-crash']
title = 'test_threading.test_6_daemon_threads(): Assertion failed: PyUnicode_Check(*filename), file ..\\Python\\_warnings.c, line 501'
updated_at = <Date 2011-07-04.17:54:51.882>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2011-07-04.17:54:51.882>
actor = 'python-dev'
assignee = 'none'
closed = True
closed_date = <Date 2011-07-04.09:21:09.951>
closer = 'vstinner'
components = ['Library (Lib)', 'Tests', 'Windows']
creation = <Date 2011-07-01.13:21:22.884>
creator = 'vstinner'
dependencies = []
files = ['22557', '22558']
hgrepos = []
issue_num = 12467
keywords = ['patch']
message_count = 7.0
messages = ['139577', '139711', '139712', '139713', '139725', '139726', '139795']
nosy_count = 3.0
nosy_names = ['pitrou', 'vstinner', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'commit review'
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue12467'
versions = ['Python 2.7', 'Python 3.2', 'Python 3.3']

[vstinner]

======================================================================
FAIL: test_6_daemon_threads (test.test_threading.ThreadJoinOnShutdown)
----------------------------------------------------------------------

Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\test_threading.py", line 677, in test_6_daemon_threads
    rc, out, err = assert_python_ok('-c', script)
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\script_helper.py", line 50, in assert_python_ok
    return _assert_python(True, *args, **env_vars)
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\script_helper.py", line 42, in _assert_python
    "stderr follows:\n%s" % (rc, err.decode('ascii', 'ignore')))
AssertionError: Process return code is 3, stderr follows:

Assertion failed: PyUnicode_Check(*filename), file ..\Python\_warnings.c, line 501

http://www.python.org/dev/buildbot/all/builders/x86%20XP-4%203.x/builds/4881/steps/test/logs/stdio

[vstinner]

The assertion occurs in setup_context() of Python/_warnings.c, called by fileio_dealloc_warn(). The problem is that globals()['__file__'] is None.

Attached patch should fix this issue.

[vstinner]

Test script to reproduce the assertion.

[pitrou]

Nice diagnosis!

[python-dev]

New changeset ac18e70cbe7e by Victor Stinner in branch '3.2':
Issue bpo-12467: warnings: fix a race condition if a warning is emitted at
http://hg.python.org/cpython/rev/ac18e70cbe7e

New changeset 5133fee2433e by Victor Stinner in branch 'default':
(merge 3.2) Issue bpo-12467: warnings: fix a race condition if a warning is
http://hg.python.org/cpython/rev/5133fee2433e

[python-dev]

New changeset fc46acf7a645 by Victor Stinner in branch '2.7':
Issue bpo-12467: warnings: fix a race condition if a warning is emitted at
http://hg.python.org/cpython/rev/fc46acf7a645

[python-dev]

New changeset 861b483e88d9 by Victor Stinner in branch '3.2':
Issue bpo-12467: warnings: fix a race condition if a warning is emitted at
http://hg.python.org/cpython/rev/861b483e88d9