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https://issues.apache.org/jira/browse/LUCENE-3475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alan Woodward updated LUCENE-3475:
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    Attachment: LUCENE-3475.patch

> ShingleFilter should handle positionIncrement of zero, e.g. synonyms
> --------------------------------------------------------------------
>
>                 Key: LUCENE-3475
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3475
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: modules/analysis
>            Reporter: Cameron
>            Assignee: Alan Woodward
>            Priority: Minor
>              Labels: newdev
>         Attachments: LUCENE-3475.patch
>
>
> ShingleFilter is creating shingles for a single term that has been expanded 
> by synonyms when it shouldn't. The position increment is 0.
> As an example, I have an Analyzer with a SynonymFilter followed by a 
> ShingleFilter. Assuming car and auto are synonyms, the SynonymFilter produces 
> two tokens and position 1: car, auto. The ShingleFilter is then producing 3 
> tokens, when there should only be two: car, car auto, auto. This behavior 
> seems incorrect.



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