Test failures with -OO

[voidspace]

BPO	9964
Nosy	@birkenfeld, @bitdancer, @voidspace
Files	pdb.diff

^{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 2010-10-14.08:13:47.355>
created_at = <Date 2010-09-27.22:26:59.341>
labels = ['tests']
title = 'Test failures with -OO'
updated_at = <Date 2010-10-14.08:13:47.354>
user = 'https://github.com/voidspace'

bugs.python.org fields:

activity = <Date 2010-10-14.08:13:47.354>
actor = 'georg.brandl'
assignee = 'none'
closed = True
closed_date = <Date 2010-10-14.08:13:47.355>
closer = 'georg.brandl'
components = ['Tests']
creation = <Date 2010-09-27.22:26:59.341>
creator = 'michael.foord'
dependencies = []
files = ['19036']
hgrepos = []
issue_num = 9964
keywords = ['patch']
message_count = 4.0
messages = ['117485', '117489', '118629', '118632']
nosy_count = 3.0
nosy_names = ['georg.brandl', 'r.david.murray', 'michael.foord']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue9964'
versions = ['Python 3.2']

[voidspace]

When I run the test suite (py3k branch) with -OO I get 42 failures. Most of these look like they are caused by the same (or a similar) problem (attempting to run doctests from now-non-existent docstrings).

The tests that fail are:

When I run with -OO I get 42 test failures. Most of them look like they are due to missing docstrings but some are likely to be due to missing asserts.

42 tests failed:
test_bisect test_cmd test_code test_collections test_compileall
test_ctypes test_decimal test_deque test_descrtut test_dictcomps
test_difflib test_dis test_distutils test_doctest test_extcall
test_generators test_genexps test_getopt test_http_cookies
test_import test_itertools test_json test_lib2to3 test_listcomps
test_math test_metaclass test_pdb test_pickle test_pickletools
test_pyclbr test_setcomps test_syntax test_threading_local
test_tokenize test_unpack test_unpack_ex test_urllib2 test_weakref
test_xml_etree test_xml_etree_c test_zipimport
test_zipimport_support

Typical tracebacks (one explicitly calling doctest code, the other through test.support):

Traceback (most recent call last):
  File "Lib/test/test_collections.py", line 3, in <module>
    import unittest, doctest, operator
  File "/compile/py3k/Lib/doctest.py", line 97, in <module>
    import unittest, difflib, pdb, tempfile
  File "/compile/py3k/Lib/pdb.py", line 1348, in <module>
    __doc__ += getattr(Pdb, 'do_' + _command).__doc__.strip() + '\n\n'
AttributeError: 'NoneType' object has no attribute 'strip'

Traceback (most recent call last):
  File "Lib/test/test_code.py", line 169, in <module>
    test_main()
  File "Lib/test/test_code.py", line 164, in test_main
    run_doctest(test_code, verbose)
  File "/compile/py3k/Lib/test/support.py", line 1142, in run_doctest
    import doctest
  File "/compile/py3k/Lib/doctest.py", line 97, in <module>
    import unittest, difflib, pdb, tempfile
  File "/compile/py3k/Lib/pdb.py", line 1348, in <module>
    __doc__ += getattr(Pdb, 'do_' + _command).__doc__.strip() + '\n\n'
AttributeError: 'NoneType' object has no attribute 'strip'

bpo-6292 was previously closed when all tests ran successfully with -OO, so this is a more recent regression.

[voidspace]

Most of the failures are caused by a problem in pdb.

In fact, if you run Python with -OO you can't even *import* pdb.

The attached patch fixes that problem (a hasty and untested patch though), and that reduces the number of failures to 5:

5 tests failed:
test_compileall test_dis test_import test_lib2to3 test_xml_etre

[birkenfeld]

Fixed pdb issue in r85457.

[birkenfeld]

r85459 - test_dis
r85460 - test_import
r85461 - test_lib2to3 (bug was in fix_operator)
r85462 - test_xml_etree
r85464 - test_compileall
r85465 - test_cmd_line_script

That should be all of them.