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https://issues.apache.org/jira/browse/LUCENE-7719?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Smiley resolved LUCENE-7719.
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Resolution: Fixed
Fix Version/s: master (7.0)
> UnifiedHighlighter doesn't handle some AutomatonQuery's with multi-byte chars
> -----------------------------------------------------------------------------
>
> Key: LUCENE-7719
> URL: https://issues.apache.org/jira/browse/LUCENE-7719
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/highlighter
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Minor
> Fix For: master (7.0)
>
> Attachments: LUCENE_7719.patch
>
>
> In MultiTermHighlighting, a CharacterRunAutomaton is being created that takes
> the result of AutomatonQuery.getAutomaton that in turn is byte oriented, not
> character oriented. For ASCII terms, this is safe but it's not for
> multi-byte characters. This is most likely going to rear it's head with a
> WildcardQuery, but due to special casing in MultiTermHighlighting,
> PrefixQuery isn't affected. Nonetheless it'd be nice to get a general fix in
> so that MultiTermHighlighting can remove special cases for PrefixQuery and
> TermRangeQuery (both subclass AutomatonQuery).
> AFAICT, this bug was likely in the PostingsHighlighter since inception.
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