Merged revisions 86244 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r86244 | eric.araujo | 2010-11-06 05:48:05 +0100 (sam., 06 nov. 2010) | 3 lines

  Prevent race condition with mkdir in distutils.  Patch by Arfrever on #9281.
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dir_util.py

@@ -69,10 +69,11 @@ def mkpath(name, mode=0o777, verbose=1, dry_run=0):
         if not dry_run:
             try:
                 os.mkdir(head, mode)
-                created_dirs.append(head)
             except OSError as exc:
+                if not (exc.errno == errno.EEXIST and os.path.isdir(head)):
                     raise DistutilsFileError(
                           "could not create '%s': %s" % (head, exc.args[-1]))
+            created_dirs.append(head)
 
         _path_created[abs_head] = 1
     return created_dirs