From 6b16ee5e674afc6a534cceefd79c9f4831384bf3 Mon Sep 17 00:00:00 2001
From: olveyra <none@none>
Date: Tue, 2 Sep 2008 17:39:22 +0000
Subject: [PATCH] - assure deferred_degenerate will take an iterable (bug
 raised when no spider middleware is enabled)

--HG--
extra : convert_revision : svn%3Ab85faa78-f9eb-468e-a121-7cced6da292c%40200
---
 scrapy/trunk/scrapy/utils/misc.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scrapy/trunk/scrapy/utils/misc.py b/scrapy/trunk/scrapy/utils/misc.py
index 0d1fe40cb..2b1514382 100644
--- a/scrapy/trunk/scrapy/utils/misc.py
+++ b/scrapy/trunk/scrapy/utils/misc.py
@@ -112,7 +112,7 @@ def memoize(cache, hash):
 
 
 def deferred_degenerate(generator, container=None, next_delay=0):
-    generator = iter(generator)
+    generator = iter(generator or [])
     deferred = defer.Deferred()
     container = container or []
     def _next():