diff -r 8962d1c442a6 Python/traceback.c
--- a/Python/traceback.c	Mon Oct 28 08:08:09 2013 +0100
+++ b/Python/traceback.c	Mon Oct 28 17:47:38 2013 +0100
@@ -240,9 +240,21 @@ int
     if (filename == NULL)
         return 0;
 
-    io = PyImport_ImportModuleNoBlock("io");
-    if (io == NULL)
-        return -1;
+    if (_Py_Finalizing) {
+        PyInterpreterState *interp = PyThreadState_GET()->interp;
+        io = PyDict_GetItemString(interp->modules, "io");
+        if (io == NULL) {
+            /* Don't reload the io module during Python finalization */
+            return 0;
+        }
+        Py_INCREF(io);
+    }
+    else {
+        io = PyImport_ImportModuleNoBlock("io");
+        if (io == NULL)
+            return -1;
+    }
+
     binary = _PyObject_CallMethodId(io, &PyId_open, "Os", filename, "rb");
 
     if (binary == NULL) {