adds handle_error(self):raise to test modules using asyncore to provide a clearer error message in case something goes wrong
diff --git a/Lib/test/test_smtplib.py b/Lib/test/test_smtplib.py
index b74fa40..42a10be 100644
--- a/Lib/test/test_smtplib.py
+++ b/Lib/test/test_smtplib.py
@@ -366,6 +366,9 @@
         else:
             self.push('550 No access for you!')
 
+    def handle_error(self):
+        raise
+
 
 class SimSMTPServer(smtpd.SMTPServer):
 
@@ -384,6 +387,9 @@
     def add_feature(self, feature):
         self._extra_features.append(feature)
 
+    def handle_error(self):
+        raise
+
 
 # Test various SMTP & ESMTP commands/behaviors that require a simulated server
 # (i.e., something with more features than DebuggingServer)