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https://issues.apache.org/jira/browse/LUCENE-6393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14394962#comment-14394962
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Robert Muir commented on LUCENE-6393:
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I think SpanPayloadCheckQuery, SpanPositionRangeQuery, or any other subclasses
of SpanPositionCheckQuery are likely impacted.
> SpanFirstQuery sometimes returns Spans without any positions
> ------------------------------------------------------------
>
> Key: LUCENE-6393
> URL: https://issues.apache.org/jira/browse/LUCENE-6393
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
>
> This hits an assert in SpanScorer because it breaks the javadocs contract of
> Spans.nextStartPosition():
> * Returns the next start position for the current doc.
> * There is always *at least one start/end position* per doc.
> * After the last start/end position at the current doc this returns
> NO_MORE_POSITIONS.
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