From: Jason Kirtland <jek@discorporate.us>
Date: Thu, 16 Jul 2009 23:24:30 +0000 (+0000)
Subject: Guard against a gc hitting during the sweep for dirty objects.
X-Git-Tag: rel_0_5_6~41
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=f843442d97b801e1f57dc21aa0e25a30f4986018;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

Guard against a gc hitting during the sweep for dirty objects.
---

diff --git a/lib/sqlalchemy/orm/identity.py b/lib/sqlalchemy/orm/identity.py
index dc219e1eb8..50301a13c3 100644
--- a/lib/sqlalchemy/orm/identity.py
+++ b/lib/sqlalchemy/orm/identity.py
@@ -43,17 +43,18 @@ class IdentityMap(dict):
         del state._instance_dict
         self._mutable_attrs.discard(state)
         self._modified.discard(state)
-    
+
     def _dirty_states(self):
-        return self._modified.union(s for s in self._mutable_attrs if s.modified)
-        
+        return self._modified.union(s for s in list(self._mutable_attrs)
+                                    if s.modified)
+
     def check_modified(self):
         """return True if any InstanceStates present have been marked as 'modified'."""
         
         if self._modified:
             return True
         else:
-            for state in self._mutable_attrs:
+            for state in list(self._mutable_attrs):
                 if state.modified:
                     return True
         return False