diff -r 37671fc60f34 Lib/test/test_subprocess.py
--- a/Lib/test/test_subprocess.py	Thu Sep 16 17:04:49 2010 +0200
+++ b/Lib/test/test_subprocess.py	Thu Sep 16 13:48:21 2010 -0400
@@ -839,6 +839,58 @@
         self.assertStderrEqual(stderr, b'')
         self.assertEqual(p.wait(), -signal.SIGKILL)
 
+    def test_remapping_std_fds(self):
+        # open up some temporary files
+        temps = (mkstemp(), mkstemp(), mkstemp())
+        try:
+            temp_fds = [fd for fd, fname in temps]
+
+            # unlink the files -- we won't need to reopen them
+            for fd, fname in temps:
+                os.unlink(fname)
+
+            # write some data to what will become stdin, and rewind
+            os.write(temp_fds[1], b"STDIN")
+            os.lseek(temp_fds[1], 0, 0)
+
+            # move the standard file descriptors out of the way 
+            std_fds = (0,1,2)
+            saved_fds = [os.dup(fd) for fd in std_fds]
+            try:
+                # duplicate the file objects over the standard fd's
+                for fd in std_fds:
+                    os.dup2(temp_fds[fd], fd)
+
+                # and create corresponding file objects
+                new_std_files = [os.fdopen(fd, "rw") for fd in std_fds]
+
+                # now use those files in the "wrong" order, so that subprocess
+                # has to rearrange them in the child
+                p = subprocess.Popen([sys.executable, "-c",
+                    'import sys; got = sys.stdin.read(); sys.stdout.write("got %s"%got); sys.stderr.write("err")'],
+                    stdin=new_std_files[1],
+                    stdout=new_std_files[2],
+                    stderr=new_std_files[0])
+                p.wait()
+
+            finally:
+                del new_std_files # close file objects at std_fds
+
+                # restore the original fd's underneath sys.stdin, etc.
+                for saved, std in zip(saved_fds, std_fds):
+                    os.dup2(saved, std)
+                    os.close(saved)
+
+            for fd in temp_fds:
+                os.lseek(fd, 0, 0)
+
+            self.assertEqual(os.read(temp_fds[0], 1024), "err")
+            self.assertEqual(os.read(temp_fds[2], 1024), "got STDIN")
+
+        finally:
+            for fd in temp_fds:
+                os.close(fd)
+
     def test_terminate(self):
         p = self._kill_process('terminate')
         _, stderr = p.communicate()