Index: Modules/cPickle.c
===================================================================
--- Modules/cPickle.c	(revision 47136)
+++ Modules/cPickle.c	(working copy)
@@ -3631,6 +3631,9 @@
 		PyObject *tp, *v, *tb;
 
 		PyErr_Fetch(&tp, &v, &tb);
+		/* v can be NULL if there was a KeyboardInterrupt */
+		if (v == NULL)
+			v = Py_None;
 		if ((r=PyTuple_Pack(3,v,cls,args))) {
 			Py_XDECREF(v);
 			v=r;