Update security settings fails

In our portal Update security settings in portal_workflows fails with 
this traceback:
Traceback (innermost last):

     * Module ZPublisher.Publish, line 115, in publish
     * Module ZPublisher.mapply, line 88, in mapply
     * Module ZPublisher.Publish, line 41, in call_object
     * Module Products.CMFCore.WorkflowTool, line 483, in updateRoleMappings
     * Module Products.CMFCore.WorkflowTool, line 666, in 
_recursiveUpdateRoleMappings
     * Module Products.CMFCore.WorkflowTool, line 666, in 
_recursiveUpdateRoleMappings
     * Module Products.CMFCore.WorkflowTool, line 666, in 
_recursiveUpdateRoleMappings
     * Module Products.CMFCore.WorkflowTool, line 649, in 
_recursiveUpdateRoleMappings
     * Module Products.CPSWorkflow.workflow, line 268, in 
updateRoleMappingsFor
     * Module Products.CPSWorkflow.workflow, line 136, in 
updateStackDefinitionsRoleMappingsFor

TypeError: unsubscriptable object

this happens for an object of a flexible_type, which we assigned the 
section_folder_wf.

here is the diff for CPSWorkflow.workflow.py which fixes this for me:

  diff workflow.py.org workflow.py
132d131
<
135,143c134,143
<         try:
<             former_status = history[-2]
<         except IndexError:
<             # Virgin instance ;)
<             pass
<         else:
<             sflrm = former_status.get('sflrm', {})
<             for k, v in sflrm.items():
<                 wftool.updateFormerLocalRoleMappingForStack(ob, self.id,
---
 >         if history is not None:
 >             try:
 >                 former_status = history[-2]
 >             except IndexError:
 >                 # Virgin instance ;)
 >                 pass
 >             else:
 >                 sflrm = former_status.get('sflrm', {})
 >                 for k, v in sflrm.items():
 >                     wftool.updateFormerLocalRoleMappingForStack(ob, 
self.id,



-- 
Gruß Joachim



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