possible bug (race condition) in injector's __import__ handling about duecredit HOT 4 CLOSED

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ERROR: duecredit.tests.test_injections.test_no_double_activation
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Traceback (most recent call last):
  File "/home/travis/virtualenv/python2.7.9/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/home/travis/build/duecredit/duecredit/duecredit/tests/test_injections.py", line 142, in test_no_double_activation
    injector.activate()
  File "/home/travis/build/duecredit/duecredit/duecredit/injections/injector.py", line 219, in activate
    raise RuntimeError("__import__ is already duecredited")
RuntimeError: __import__ is already duecredited
-------------------- >> begin captured logging << --------------------
duecredit: WARNING: _orig_import is not yet known, so we haven't decorated default importer yet. Nothing TODO
--------------------- >> end captured logging << ---------------------

    print("Assigned4: %s" % DueCreditInjector._orig_import)
    globs = glob(ptrn)
    print("Assigned5: %s" % DueCreditInjector._orig_import)

Assigned4: <built-in function __import__>
Assigned5: None

2 11919.....................................:Wed 12 Aug 2015 06:48:30 PM EDT:.
(git)hopa:~/proj/duecredit[pr-41]git
$> find -iname *pyc -delete
2 11920.....................................:Wed 12 Aug 2015 06:48:46 PM EDT:.
(git)hopa:~/proj/duecredit[pr-41]git
$> .tox/py27/bin/nosetests -s duecredit
.......2015-08-12 18:48:49,620 [ERROR  ] Just use nosetests duecredit for now (NotImplementedError) (main.py:178)
.....................SS.......2015-08-12 18:48:49,633 [WARNING] Seems that we are calling duecredit_importer twice. No harm is done but shouldn't happen (injector.py:280)
...2015-08-12 18:48:49,635 [WARNING] _orig_import is not yet known, so we haven't decorated default importer yet. Nothing TODO (injector.py:330)
.........SSSSSSSS
----------------------------------------------------------------------
Ran 57 tests in 0.088s

OK (SKIP=10)
2 11921.....................................:Wed 12 Aug 2015 06:48:49 PM EDT:.
(git)hopa:~/proj/duecredit[pr-41]git
$> .tox/py27/bin/nosetests -s duecredit
.......2015-08-12 18:48:51,144 [ERROR  ] Just use nosetests duecredit for now (NotImplementedError) (main.py:178)
.....................SS..2015-08-12 18:48:51,156 [ERROR  ] For some reason self._orig_import is None. Importing using stock importer to mitigate (injector.py:253)
2015-08-12 18:48:51,156 [ERROR  ] For some reason self._orig_import is None. Importing using stock importer to mitigate (injector.py:253)
Traceback (most recent call last):
  File ".tox/py27/bin/nosetests", line 11, in <module>
    sys.exit(run_exit())
  File "/home/yoh/proj/duecredit/.tox/py27/local/lib/python2.7/site-packages/nose/core.py", line 121, in __init__
    **extra_args)
  File "/usr/lib/python2.7/unittest/main.py", line 95, in __init__
    self.runTests()
  File "/home/yoh/proj/duecredit/.tox/py27/local/lib/python2.7/site-packages/nose/core.py", line 207, in runTests
    result = self.testRunner.run(self.test)
  File "/home/yoh/proj/duecredit/.tox/py27/local/lib/python2.7/site-packages/nose/core.py", line 62, in run
    test(result)
  File "/home/yoh/proj/duecredit/.tox/py27/local/lib/python2.7/site-packages/nose/suite.py", line 177, in __call__