[jira] [Created] (LUCENE-9274) UnifiedHighlighter cannot handle SpanMultiTermQueryWrapper with an Automaton of type SINGLE

["Christoph Goller (Jira)" <ji...@apache.org>]

Christoph Goller created LUCENE-9274:
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             Summary: UnifiedHighlighter cannot handle SpanMultiTermQueryWrapper with an Automaton of type SINGLE
                 Key: LUCENE-9274
                 URL: https://issues.apache.org/jira/browse/LUCENE-9274
             Project: Lucene - Core
          Issue Type: Bug
    Affects Versions: 8.4
            Reporter: Christoph Goller


MultiTermHighlighting.extractAutomata ignores a Term from a SINGLE Automaton and Highlighting does not work. 

Of course an AutomatonQuery with a single term does not make much sense, but it may be generated by an automatic process.

Possible fixes:
 * Either implement consumeTerms in MultiTermHighlighting.AutomataCollector
 * Or remove special case for SINGLE in CompiledAutomaton.visit

I attatch a Unit Test



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