Index: Python/sysmodule.c
===================================================================
--- Python/sysmodule.c	(revision 61467)
+++ Python/sysmodule.c	(working copy)
@@ -169,6 +169,11 @@
 static PyObject *
 sys_exc_clear(PyObject *self, PyObject *noargs)
 {
+	if(Py_Py3kWarningFlag &&
+	   PyErr_Warn(PyExc_DeprecationWarning,
+		      "sys.exc_clear() not supported in 3.x.  Use except statements.") < 0)
+	return NULL;
+
 	PyThreadState *tstate = PyThreadState_GET();
 	PyObject *tmp_type, *tmp_value, *tmp_tb;
 	tmp_type = tstate->exc_type;
Index: Misc/NEWS
===================================================================
--- Misc/NEWS	(revision 61467)
+++ Misc/NEWS	(working copy)
@@ -12,6 +12,8 @@
 Core and builtins
 -----------------
 
+- Issue #2358: Adding a Py3k warning on sys.exc_clear() usage.
+
 - Issue #2321: use pymalloc for unicode object string data to reduce
   memory usage in some circumstances.