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https://issues.apache.org/jira/browse/LUCENE-1542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714020#action_12714020
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Michael McCandless commented on LUCENE-1542:
--------------------------------------------

Alas, this looks like a dup of LUCENE-1255, where we at first did a fix (like 
this one) but then decided it was not back-compatible and so reverted it.

However, if that first token (with posIncr=0) also has a payload, it appears to 
be particularly disastrous, since the way we encode a payload (by left-shifting 
the position delta by 1 bit) does not preserve the -1, right?

> Lucene can incorrectly set the position of tokens that start a field with 
> positonInc 0.
> ---------------------------------------------------------------------------------------
>
>                 Key: LUCENE-1542
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1542
>             Project: Lucene - Java
>          Issue Type: Bug
>    Affects Versions: 2.4
>            Reporter: Mark Miller
>            Priority: Minor
>             Fix For: 2.9
>
>         Attachments: LUCENE-1542.patch
>
>
> More info in LUCENE-1465

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