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https://issues.apache.org/jira/browse/LUCENE-8586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16707402#comment-16707402
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Alan Woodward commented on LUCENE-8586:
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Patch with test and fix.
> Logic error in Intervals.or() can cause endless loop
> ----------------------------------------------------
>
> Key: LUCENE-8586
> URL: https://issues.apache.org/jira/browse/LUCENE-8586
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Alan Woodward
> Assignee: Alan Woodward
> Priority: Major
> Attachments: LUCENE-8586.patch
>
>
> An intervals source of the following type:
> {code:java}
> IntervalsSource source = Intervals.ordered(
> Intervals.or(Intervals.term("term1"), Intervals.term("term2")),
> Intervals.term("term3")){code}
> can cause an infinite loop when queried, due to a bug in the 'no more
> intervals' logic in DisjunctionIntervalIterator
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