================================== FAILURES ===================================
_________ test_cached_function_race_condition_when_persisting_output __________
tmpdir = local('C:\\Users\\appveyor\\AppData\\Local\\Temp\\1\\pytest-of-appveyor\\pytest-0\\test_cached_function_race_cond0')
capfd = <_pytest.capture.CaptureFixture object at 0x0000001640A62240>
    @with_multiprocessing
    def test_cached_function_race_condition_when_persisting_output(tmpdir, capfd):
        # Test race condition where multiple processes are writing into
        # the same output.pkl. See
        # https://github.com/joblib/joblib/issues/490 for more details.
        memory = Memory(cachedir=tmpdir.strpath)
        func_cached = memory.cache(fast_func_with_complex_output)
    
        Parallel(n_jobs=2)(delayed(func_cached)() for i in range(3))
    
        stdout, stderr = capfd.readouterr()
    
        # Checking both stdout and stderr (ongoing PR #434 may change
        # logging destination) to make sure there is no exception while
        # loading the results
        exception_msg = 'Exception while loading results'
        assert exception_msg not in stdout
>       assert exception_msg not in stderr
E       assert 'Exception w...ding results' not in "WARNING:root...pkl'\r\n\r\n"
E         'Exception while loading results' is contained here:
E           oblib')]: Exception while loading results for fast_func_with_complex_output()
E         ?           +++++++++++++++++++++++++++++++
E            Traceback (most recent call last):
E             File "c:\python35-x64\lib\site-packages\joblib\memory.py", line 524, in _cached_call
E               verbose=self._verbose)
E             File "c:\python35-x64\lib\site-packages\joblib\memory.py", line 137, in _load_output
E               result = numpy_pickle.load(filename, mmap_mode=mmap_mode)
E             File "c:\python35-x64\lib\site-packages\joblib\numpy_pickle.py", line 570, in load
E               with open(filename, 'rb') as f:
E           PermissionError: [Errno 13] Permission denied: 'C:\\Users\\appveyor\\AppData\\Local\\Temp\\1\\pytest-of-appveyor\\pytest-0\\test_cached_function_race_cond0\\joblib\\joblib\\test\\test_memory\\fast_func_with_complex_output\\72a755383fba437e4dead6ff3e3d81e3\\output.pkl'
capfd      = <_pytest.capture.CaptureFixture object at 0x0000001640A62240>
exception_msg = 'Exception while loading results'
func_cached = MemorizedFunc(func=<function fast_func_with_complex_output at 0x000000163FA5A598>, cachedir='C:\\Users\\appveyor\\AppData\\Local\\Temp\\1\\pytest-of-appveyor\\pytest-0\\test_cached_function_race_cond0\\joblib')
memory     = Memory(cachedir='C:\\Users\\appveyor\\AppData\\Local\\Temp\\1\\pytest-of-appveyor\\pytest-0\\test_cached_function_race_cond0\\joblib')
stderr     = "WARNING:root:[MemorizedFunc(func=<function fast_func_with_complex_output at 0x000000CDFC7BF510>, cachedir='C:\\\\User...lib\\\\test\\\\test_memory\\\\fast_func_with_complex_output\\\\72a755383fba437e4dead6ff3e3d81e3\\\\output.pkl'\r\n\r\n"
stdout     = ''
tmpdir     = local('C:\\Users\\appveyor\\AppData\\Local\\Temp\\1\\pytest-of-appveyor\\pytest-0\\test_cached_function_race_cond0')
c:\python35-x64\lib\site-packages\joblib\test\test_memory.py:765: AssertionError
============== 1 failed, 1021 passed, 4 skipped in 85.09 seconds ==============