--- Python-2.5.4/Modules/pyexpat.c.orig	2009-01-07 20:20:46.000000000 -0800
+++ Python-2.5.4/Modules/pyexpat.c	2009-01-07 20:41:27.000000000 -0800
@@ -1005,6 +1005,12 @@
 
     if (PyFile_Check(f)) {
         fp = PyFile_AsFile(f);
+        if (!fp) {
+            PyErr_Clear();
+            PyErr_SetString(PyExc_ValueError,
+                            "attempting to parse closed file");
+            return NULL;
+        }
     }
     else {
         fp = NULL;