David Smiley created LUCENE-7719:
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Summary: 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
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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