From aa3205bde60a21ae382373e0fc6775ab71d60886 Mon Sep 17 00:00:00 2001
From: Daniel Brown <ddb@star.sr.bham.ac.uk>
Date: Wed, 17 Aug 2016 11:24:22 -0700
Subject: [PATCH] fixing in loop edit of list

---
 pykat/param.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pykat/param.py b/pykat/param.py
index 72e9561..6644407 100644
--- a/pykat/param.py
+++ b/pykat/param.py
@@ -86,7 +86,7 @@ class putter(object):
         self.__owner = weakref.ref(newOwner)
         
     def clearPuts(self):
-        for _ in self.putees:
+        for _ in self.putees.copy():
             _.put(None)
     
     def register(self, toput):
-- 
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