From bc4111ba68e5eede1f68882a16d68441a845e30b Mon Sep 17 00:00:00 2001
From: konarkmodi <modi.konark@gmail.com>
Date: Tue, 19 Mar 2013 10:34:59 +0530
Subject: Fixed #18003 -- Preserved tracebacks when re-raising errors.

Thanks jrothenbuhler for draft patch, Konark Modi for updates.
---
 django/utils/http.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'django/utils')

diff --git a/django/utils/http.py b/django/utils/http.py
index 0ab5198804..73b6396286 100644
--- a/django/utils/http.py
+++ b/django/utils/http.py
@@ -144,7 +144,7 @@ def parse_http_date(date):
         result = datetime.datetime(year, month, day, hour, min, sec)
         return calendar.timegm(result.utctimetuple())
     except Exception:
-        raise ValueError("%r is not a valid date" % date)
+        six.reraise(ValueError, ValueError("%r is not a valid date" % date), sys.exc_info()[2])
 
 def parse_http_date_safe(date):
     """
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