Index: Lib/test/test_multiprocessing.py
===================================================================
--- Lib/test/test_multiprocessing.py	(révision 65132)
+++ Lib/test/test_multiprocessing.py	(copie de travail)
@@ -54,6 +54,9 @@
 HAVE_GETVALUE = not getattr(_multiprocessing,
                             'HAVE_BROKEN_SEM_GETVALUE', False)
 
+# Any existing and readable file name
+EXISTING_FILE = "/etc/issue"
+
 #
 # Creates a wrapper for a function which records the time it takes to finish
 #
@@ -1737,6 +1740,29 @@
 testcases_threads = create_test_cases(ThreadsMixin, type='threads')
 globals().update(testcases_threads)
 
+class TestClosedFile(unittest.TestCase):
+    def test_open(self):
+        # Create a file descriptor and directly close it
+        tmpfile = open(EXISTING_FILE)
+        fd = tmpfile.fileno()
+        tmpfile.close()
+        self.assertRaises(IOError, _multiprocessing.Connection, fd)
+
+    def test_operations(self):
+        # Create a dummy file descriptor
+        fd, unused_fd = os.pipe()
+        os.close(unused_fd)
+        try:
+            conn = _multiprocessing.Connection(fd)
+            conn.close()
+            fd = None
+            self.assertRaises(IOError, conn.send, "test")
+            self.assertRaises(IOError, conn.recv)
+            self.assertRaises(IOError, conn.poll)
+        finally:
+            if fd is not None:
+                os.close(fd)
+
 #
 #
 #
@@ -1765,7 +1791,8 @@
     testcases = (
         sorted(testcases_processes.values(), key=lambda tc:tc.__name__) +
         sorted(testcases_threads.values(), key=lambda tc:tc.__name__) +
-        sorted(testcases_manager.values(), key=lambda tc:tc.__name__)
+        sorted(testcases_manager.values(), key=lambda tc:tc.__name__) +
+        [TestClosedFile]
         )
 
     loadTestsFromTestCase = unittest.defaultTestLoader.loadTestsFromTestCase