diff -r 18a311479e8b Lib/distutils/file_util.py
--- a/Lib/distutils/file_util.py	Mon Aug 11 01:11:27 2014 +0200
+++ b/Lib/distutils/file_util.py	Mon Aug 11 15:35:10 2014 +0300
@@ -194,7 +194,7 @@
     try:
         os.rename(src, dst)
     except OSError as e:
-        (num, msg) = e
+        (num, msg) = e.args
         if num == errno.EXDEV:
             copy_it = True
         else:
diff -r 18a311479e8b Lib/distutils/tests/test_file_util.py
--- a/Lib/distutils/tests/test_file_util.py	Mon Aug 11 01:11:27 2014 +0200
+++ b/Lib/distutils/tests/test_file_util.py	Mon Aug 11 15:35:10 2014 +0300
@@ -2,10 +2,12 @@
 import unittest
 import os
 import shutil
+from unittest.mock import patch
 
 from distutils.file_util import move_file
 from distutils import log
 from distutils.tests import support
+from distutils.errors import DistutilsFileError
 from test.support import run_unittest
 
 class FileUtilTestCase(support.TempdirManager, unittest.TestCase):
@@ -58,6 +60,15 @@
         wanted = ['moving %s -> %s' % (self.source, self.target_dir)]
         self.assertEqual(self._logs, wanted)
 
+    @patch('os.rename', side_effect=OSError('wrong', 1))
+    def test_exception_unpacking(self, _):
+        # When an OSError was raised inside the function,
+        # the exception was unpacked using ``(num, msg) = e``,
+        # which is wrong.
+        with self.assertRaises(DistutilsFileError):
+            with open(self.source, 'w') as stream:
+                pass
+            move_file(self.source, self.target, verbose=1)
 
 def test_suite():
     return unittest.makeSuite(FileUtilTestCase)