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https://issues.apache.org/jira/browse/LUCENE-1926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759572#action_12759572
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Uwe Schindler commented on LUCENE-1926:
---------------------------------------

I think this info from next(Token) javadocs also applies to incrementToken():
{code}
   * Also, the producer must make no assumptions about a {...@link Token} after 
it
   * has been returned: the caller may arbitrarily change it. If the producer
   * needs to hold onto the {...@link Token} for subsequent calls, it must 
clone()
   * it before storing it. Note that a {...@link TokenFilter} is considered a
   * consumer.
{code}

> 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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