From 1258d1ed9e8064e08fd77d2dc3938fcebc130800 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Wed, 31 Mar 2010 13:52:57 -0400
Subject: - 'cycle' is a stack here - needs to be a list.

---
 lib/sqlalchemy/topological.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'lib/sqlalchemy/topological.py')

diff --git a/lib/sqlalchemy/topological.py b/lib/sqlalchemy/topological.py
index d35213f6b..9e584ff4e 100644
--- a/lib/sqlalchemy/topological.py
+++ b/lib/sqlalchemy/topological.py
@@ -270,7 +270,7 @@ def _find_cycles(edges):
         for (n, key) in edges.edges_by_parent(node):
             if key in cycle:
                 continue
-            cycle.add(key)
+            cycle.append(key)
             if key is goal:
                 cycset = set(cycle)
                 for x in cycle:
@@ -287,7 +287,7 @@ def _find_cycles(edges):
             cycle.pop()
 
     for parent in edges.get_parents():
-        traverse(parent, set(), parent)
+        traverse(parent, [], parent)
 
     unique_cycles = set(tuple(s) for s in cycles.values())
     
-- 
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