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https://issues.apache.org/jira/browse/LUCENE-1926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759573#action_12759573
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Uwe Schindler commented on LUCENE-1926:
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bq. Uwe, yes. I expect that if I added a stemmer, or reversetokenfilter, or
something it would modify my termAttribute. What i didnt expect is that the
back compat layer would modify my termAttribute.
OK, but this was the same with next(Token) (see above). You could not rely on
the fact that the reusableToken is preserved, it could even be changed by the
consumer or whatever.
You can implement you TokenFilter with next(reusableToken) and will have the
same problems if you rely on the reusableToken is preserved from the last call.
> Back compat break with old next() consumer API
> ----------------------------------------------
>
> Key: LUCENE-1926
> URL: https://issues.apache.org/jira/browse/LUCENE-1926
> Project: Lucene - Java
> Issue Type: Bug
> Components: Analysis
> Affects Versions: 2.9
> Reporter: Robert Muir
> Attachments: CaptureStateTestcase.java
>
>
> There is a bug that causes tokenstreams to return different results,
> depending upon whether they are consumed with the incrementToken() api or the
> next() api.
> I found this because the Solr analysis tool in the admin page uses the next()
> api, and i was seeing strange results.
> I've created a test case to show the problem. when calling captureState(),
> the current state is erased, but only when consuming with the next() api.
> If I consume with incrementToken(), things work.
> {code}
> State tempState = captureState(); // after we capture state here, things get
> strange.
> String right = termAtt.term(); // when using old consumer API, this value is
> wrong!!!!
> {code}
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