[Zope] ZTopics breaks with 2.2?

[Jonathan Cheyne]

Hi, can anyone confirm that the ZTopics product works after upgrading to
2.2? I get an AttributeError for value Lexicon after migrating. 


Error
Zope has encountered an error while publishing this resource. 

Error Type: AttributeError
Error Value: lexicon

Traceback (innermost last):
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/ZPublisher/Publish.py, line
222, in publish_module
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/ZPublisher/Publish.py, line
187, in publish
  File /home/zope/Zope-2.2.0-linux2-x86/lib/python/Zope/__init__.py,
line 221, in zpublisher_exception_hook
    (Object: ElementWithAttributes)
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/ZPublisher/Publish.py, line
171, in publish
  File /home/zope/Zope-2.2.0-linux2-x86/lib/python/ZPublisher/mapply.py,
line 160, in mapply
    (Object: index_html)
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/ZPublisher/Publish.py, line
112, in call_object
    (Object: index_html)
  File /home/zope/Zope-2.2.0-linux2-x86/lib/python/OFS/DTMLMethod.py,
line 167, in __call__
    (Object: index_html)
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/DocumentTemplate/DT_String.py,
line 502, in __call__
    (Object: index_html)
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/Products/ZTopic/Topic.py,
line 166, in contents
    (Object: ElementWithAttributes)
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/Products/ZTopic/Topic.py,
line 228, in _contentsSet
    (Object: ElementWithAttributes)
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/SearchIndex/UnTextIndex.py,
line 391, in _apply_index
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/SearchIndex/UnTextIndex.py,
line 463, in query
  File
/home/zope/Zope-2.2.0-linux2-x86/lib/python/SearchIndex/UnTextIndex.py,
line 197, in getLexicon
AttributeError: (see above)