[jira] [Commented] (LUCENE-6418) NearSpans[Payload]Ordered sometimes returns -1 for nextStartPosition()

["Robert Muir (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-6418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14491491#comment-14491491 ] 

Robert Muir commented on LUCENE-6418:
-------------------------------------

More generally this will help too: LUCENE-6411
I've already started working on it, so we can find and eliminate all these bugs.

> NearSpans[Payload]Ordered sometimes returns -1 for nextStartPosition()
> ----------------------------------------------------------------------
>
>                 Key: LUCENE-6418
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6418
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
>
> It happens in both impls, so I think the problem is in NearSpansPayloadOrdered. Maybe atFirstInCurrentDoc gets set without matchStart getting set?
> Can be triggered more generally in tests like this:
> {code}
>   @Override
>   public int nextStartPosition() throws IOException {
>     if (atFirstInCurrentDoc) {
>       atFirstInCurrentDoc = false;
>       assert matchStart >= 0; // add this assert
>       return matchStart;
>     }
> {code}



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