From: Ben Darnell <ben@bendarnell.com>
Date: Fri, 17 May 2013 04:07:25 +0000 (-0400)
Subject: Dereference the current YieldPoint as soon as it resolves.
X-Git-Tag: v3.0.2~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6fce4f80a8a6090ce3976ec722832b08c3b649c8;p=thirdparty%2Ftornado.git

Dereference the current YieldPoint as soon as it resolves.

These references could otherwise keep a chain of old references alive
(test code: https://groups.google.com/group/python-tornado/browse_thread/thread/37d3928817e4924d)
---

diff --git a/tornado/gen.py b/tornado/gen.py
index 885b604d3..c2b895875 100644
--- a/tornado/gen.py
+++ b/tornado/gen.py
@@ -498,6 +498,7 @@ class Runner(object):
                         if not self.yield_point.is_ready():
                             return
                         next = self.yield_point.get_result()
+                        self.yield_point = None
                     except Exception:
                         self.exc_info = sys.exc_info()
                 try: