set __traceback_info__ to ease debugging

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@24058 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFCategory/CategoryTool.py

@@ -1688,6 +1688,7 @@ class CategoryTool( UniqueObject, Folder, Base ):
         else:
           stack = list(relative_url)
         stack.reverse()
+        __traceback_info__ = relative_url
 
         validate = getSecurityManager().validate
         def restrictedGetOb(container, key, default):