[Python-Dev] SystemErrors in generator (just happened in 2.5)

[Neal Norwitz]

There were some SystemErrors on one of the Windows build slaves.  Does
anyone have any ideas what might be the cause?  I looked through about
5 previous logs on the same slave and didn't see the same problem.  I
haven't seen this myself and I don't know if it's WIndows specific.  I
don't know if this has happened on the trunk or just 2.5.

For the full log see:
  http://python.org/dev/buildbot/2.5/x86%20XP%202.5/builds/197/step-test/0

n
--

*** Previous context (I don't think this really matters):

Re-running test 'test_profilehooks' in verbose mode
test_caught_exception (test.test_profilehooks.ProfileHookTestCase) ... ok
test_caught_nested_exception (test.test_profilehooks.ProfileHookTestCase) ... ok
test_distant_exception (test.test_profilehooks.ProfileHookTestCase) ... ok
test_exception (test.test_profilehooks.ProfileHookTestCase) ... ok
test_exception_in_except_clause
(test.test_profilehooks.ProfileHookTestCase) ... ok
test_exception_propogation (test.test_profilehooks.ProfileHookTestCase) ... ok
test_generator (test.test_profilehooks.ProfileHookTestCase) ... ok
test_nested_exception (test.test_profilehooks.ProfileHookTestCase) ... ok
test_raise (test.test_profilehooks.ProfileHookTestCase) ... ok
test_raise_reraise (test.test_profilehooks.ProfileHookTestCase) ... ok
test_raise_twice (test.test_profilehooks.ProfileHookTestCase) ... ok
test_simple (test.test_profilehooks.ProfileHookTestCase) ... ok
test_stop_iteration (test.test_profilehooks.ProfileHookTestCase) ... ok
test_basic_exception (test.test_profilehooks.ProfileSimulatorTestCase) ... ok
test_caught_exception (test.test_profilehooks.ProfileSimulatorTestCase) ... ok
test_distant_exception (test.test_profilehooks.ProfileSimulatorTestCase) ... ok
test_simple (test.test_profilehooks.ProfileSimulatorTestCase) ... ok

----------------------------------------------------------------------
Ran 17 tests in 0.016s

OK

*** Here is the problem:

Exception exceptions.SystemError: 'error return without exception set'
in <generator object at 0x00CCCDF8> ignored
Exception exceptions.SystemError: 'error return without exception set'
in <generator object at 0x010891F8> ignored
Exception exceptions.SystemError: 'error return without exception set'
in <generator object at 0x01089578> ignored
Exception exceptions.SystemError: 'error return without exception set'
in <generator object at 0x01089838> ignored
Exception exceptions.SystemError: 'error return without exception set'
in <generator object at 0x00D3BFB8> ignored

*** The following messages occur in other successful tests too:
    a DOS box should flash briefly ...
	find_library('c') ->  None
	find_library('m') ->  None
C:\buildbot_py25\2.5.mcintyre-windows\build\lib\test\test_unicode_file.py:103:
UnicodeWarning: Unicode equal comparison failed to convert both
arguments to Unicode - interpreting them as being unequal
  filename1==filename2
C:\buildbot_py25\2.5.mcintyre-windows\build\lib\shutil.py:36:
UnicodeWarning: Unicode equal comparison failed to convert both
arguments to Unicode - interpreting them as being unequal
  os.path.normcase(os.path.abspath(dst)))
warning: DBTxn aborted in destructor.  No prior commit() or abort().