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https://issues.apache.org/jira/browse/LUCENE-7064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15177856#comment-15177856
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Luc Vanlerberghe commented on LUCENE-7064:
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I just realized I pass the arrays from the builder to the query as is without
copying them, so any modification to the builder modifies the query as well.
I will update the PR in a moment...
> Make MultiPhraseQuery immutable
> -------------------------------
>
> Key: LUCENE-7064
> URL: https://issues.apache.org/jira/browse/LUCENE-7064
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Reporter: Luc Vanlerberghe
> Priority: Minor
> Fix For: master, 6.0
>
>
> See LUCENE-6531
> Mutable queries are an issue for automatic filter caching since modifying a
> query after it has been put into the cache will corrupt the cache. We should
> make all queries immutable (up to the boost) to avoid this issue.
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