27f9c26fdd8b broke test_shutil on the Windows buildbots:


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FAIL: test_basic (test.test_shutil.TestWhich)
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Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\test_shutil.py", line 1146, in test_basic
    self.assertEqual(rv, self.temp_file.name)
AssertionError: None != 'c:\\users\\db3l\\appdata\\local\\temp\\tmpxqw4gu\\tmp7ugfmm.exe'

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FAIL: test_full_path_short_circuit (test.test_shutil.TestWhich)
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Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\test_shutil.py", line 1152, in test_full_path_short_circuit
    self.assertEqual(self.temp_file.name, rv)
AssertionError: 'c:\\users\\db3l\\appdata\\local\\temp\\tmpmwer14\\tmpeacfbz.exe' != None

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FAIL: test_non_matching_mode (test.test_shutil.TestWhich)
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Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\test_shutil.py", line 1158, in test_non_matching_mode
    self.assertIsNone(rv)
AssertionError: 'c:\\users\\db3l\\appdata\\local\\temp\\tmp7n6ojp\\tmp5tt9pa.exe' is not None

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FAIL: test_pathext_checking (test.test_shutil.TestWhich)
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Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\test_shutil.py", line 1181, in test_pathext_checking
    self.assertEqual(self.temp_file.name, rv)
AssertionError: 'c:\\users\\db3l\\appdata\\local\\temp\\tmpipmbe3\\tmpx43hex.exe' != None

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FAIL: test_relative (test.test_shutil.TestWhich)
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Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\test_shutil.py", line 1166, in test_relative
    self.assertEqual(rv, os.path.join(tail_dir, self.file))
AssertionError: None != 'tmpcluw7l\\tmp6sy_py.exe'