From 5ded8251d21e77d259da5548333138a358f8114e Mon Sep 17 00:00:00 2001
From: Pablo Hoffman <pablo@pablohoffman.com>
Date: Tue, 16 Nov 2010 02:36:18 -0200
Subject: [PATCH] Fixed bug with deferred spider queues. Closes #288

---
 scrapy/queue.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scrapy/queue.py b/scrapy/queue.py
index 577555ece..2f2a17de5 100644
--- a/scrapy/queue.py
+++ b/scrapy/queue.py
@@ -16,12 +16,13 @@ class ExecutionQueue(object):
         self._queue = queue
         self._keepalive = keep_alive
 
+    @defer.inlineCallbacks
     def _append_next(self):
         """Called when there are no more items left in self.spider_requests.
         This method is meant to be overriden in subclasses to add new (spider,
         requests) tuples to self.spider_requests. It can return a Deferred.
         """
-        msg = self._queue.pop()
+        msg = yield self._queue.pop()
         if msg:
             name = msg.pop('name')
             msg = stringify_dict(msg) # see #250