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https://issues.apache.org/jira/browse/LUCENE-4063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13277728#comment-13277728
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Robert Muir commented on LUCENE-4063:
-------------------------------------

As far as this being a bug, the original code implements the algorithm it 
claims to implement, and undoubling anything was its heuristic: see 
http://members.unine.ch/jacques.savoy/clef/frenchStemmerPlus.txt

                
> FrenchLightStemmer performs abusive compression of (arbitrary) repeated 
> characters in long tokens
> -------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-4063
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4063
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: modules/analysis
>    Affects Versions: 3.4, 4.0
>            Reporter: Tanguy Moal
>            Assignee: Steven Rowe
>            Priority: Minor
>         Attachments: LUCENE-4063.patch, SOLR-3463.patch, SOLR-3463.patch, 
> SOLR-3463.patch
>
>
> FrenchLightStemmer performs aggressive deletions on repeated character 
> sequences, even on numbers.
> This might be unexpected during full text search.

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