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https://issues.apache.org/jira/browse/LUCENE-6390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14394471#comment-14394471
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Robert Muir commented on LUCENE-6390:
-------------------------------------
This is actually a pretty serious bug. It means none of the query stack can use
FieldInfos without breaking highlighting.
> WeightedSpansTermExtractor has a broken IndexReader
> ---------------------------------------------------
>
> Key: LUCENE-6390
> URL: https://issues.apache.org/jira/browse/LUCENE-6390
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
>
> The DelegatingLeafReader there is broken, it does not implement
> getFieldInfos. This is not an optional method, and this is blocking
> performance improvements to spans.
> I'm gonna work around it for now, but if it won't be fixed, then this
> DelegatingLeafReader optimization should be removed.
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