Index: Lib/test/test_io.py
===================================================================
--- Lib/test/test_io.py	(revision 67680)
+++ Lib/test/test_io.py	(working copy)
@@ -964,6 +964,15 @@
             rlines.append((pos, line))
         self.assertEquals(rlines, wlines)
 
+    def testReadAfterClose(self):
+        f = io.open(support.TESTFN, "wb")
+        f.write(b"aaa\n" * 1000)
+        f.close()
+        f = io.open(support.TESTFN, "rb")
+        x = f.read(1000)
+        f.close()
+        self.assertRaises(ValueError, f.read, 1000)
+
     def testTelling(self):
         f = io.open(support.TESTFN, "w+", encoding="utf8")
         p0 = f.tell()