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https://issues.apache.org/jira/browse/LUCENE-1926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759566#action_12759566
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Yonik Seeley commented on LUCENE-1926:
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Yes, I think calling captureState() before incrementToken() doesn't make sense
(as case:2 does) since the state would seem to be undefined at that point?
> 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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