From 93fe1d54bd44b190aa0f58990bc397bf22324452 Mon Sep 17 00:00:00 2001
From: Christian Becker <christian@dabecka.de>
Date: Thu, 16 Jul 2015 02:45:56 +0200
Subject: [PATCH] make external_url_handler example py3 compliant

- a raises statement with multiple values is no longer allowed in python 3
---
 flask/helpers.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/flask/helpers.py b/flask/helpers.py
index 861b21ab..ad7b1507 100644
--- a/flask/helpers.py
+++ b/flask/helpers.py
@@ -219,7 +219,7 @@ def url_for(endpoint, **values):
                 # Re-raise the BuildError, in context of original traceback.
                 exc_type, exc_value, tb = sys.exc_info()
                 if exc_value is error:
-                    raise exc_type, exc_value, tb
+                    raise exc_type(exc_value, endpoint, values).with_traceback(tb)
                 else:
                     raise error
             # url_for will use this result, instead of raising BuildError.