We need to make a 'shallow copy' here other wise the cached value is also modified.

(bad)
  tmp_list = caching_method()
  tmp_list.extend(...)
(good)
  tmp_list = caching_method()[:]
  tmp_list.extend(...)


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26641 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Predicate_getMembershipCriterionCategoryList.xml

@@ -66,7 +66,7 @@ category_list = []\n
 ctool = context.portal_categories\n
 for item in mixed_list:\n
   base_category = ctool[item]\n
-  item_list = base_category.getCategoryChildCompactLogicalPathItemList(base=1)\n
+  item_list = base_category.getCategoryChildCompactLogicalPathItemList(base=1)[:]\n
   if item_list == [[\'\', \'\']]:\n
     for fallback_category in base_category.getFallbackBaseCategoryList():\n
       fallback_category = ctool.restrictedTraverse(fallback_category, None)\n

product/ERP5/bootstrap/erp5_core/bt/revision

-1168
+1169
\ No newline at end of file