[Zodb-checkins] CVS: Zope3/src/persistence - cache.py:1.7

[Tim Peters]

Update of /cvs-repository/Zope3/src/persistence
In directory cvs.zope.org:/tmp/cvs-serv21713/src/persistence

Modified Files:
	cache.py 
Log Message:
Cache.incrgc():  Another glitch when Python's garbage collector is also
running.  If the thing a weakref refers to gets collected, then calling
the weakref returns None, and None doesn't have a _p_atime (or any
other) attribute.


=== Zope3/src/persistence/cache.py 1.6 => 1.7 ===
--- Zope3/src/persistence/cache.py:1.6	Mon Mar 17 14:44:01 2003
+++ Zope3/src/persistence/cache.py	Mon Mar 17 15:06:27 2003
@@ -100,6 +100,8 @@
         for oid, ob in self.__active.items():
             if ob is not None:
                 ob = ob()
+            if ob is None:
+                continue
             # The _p_atime field is seconds since the start of the day.
             # When we start a new day, we'll expect to see most of the
             # _p_atime values be greater than now.