From bb167743f32f6b1d84a25295505d255aea331d5c Mon Sep 17 00:00:00 2001
From: Brad Warren <bradmw@umich.edu>
Date: Wed, 30 Sep 2015 13:00:10 -0700
Subject: [PATCH] Don't call_registered() on SystemExit

---
 letsencrypt/error_handler.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/letsencrypt/error_handler.py b/letsencrypt/error_handler.py
index 1f979a6de..1292f2bc5 100644
--- a/letsencrypt/error_handler.py
+++ b/letsencrypt/error_handler.py
@@ -50,7 +50,7 @@ class ErrorHandler(object):
         self.set_signal_handlers()
 
     def __exit__(self, exec_type, exec_value, trace):
-        if exec_value is not None:
+        if exec_type not in (None, SystemExit):
             logger.debug("Encountered exception:\n%s", "".join(
                 traceback.format_exception(exec_type, exec_value, trace)))
             self.call_registered()