mayya-sharipova opened a new issue, #13103:
URL: https://github.com/apache/lucene/issues/13103
### Description
UnifiedHighlighter based on matches incorrectly returns field 'X' was
indexed without offsets, cannot highlight
Test to reproduce:
```java
static final FieldType textType = new FieldType(TextField.TYPE_STORED);
static {
textType.setStoreTermVectors(true);
textType.setStoreTermVectorPositions(true);
textType.setStoreTermVectorOffsets(true);
textType.freeze();
}
public void testHighlgiht() {
String indexPath = "../lucene-test-indices/index1";
Path path = Paths.get(indexPath);
try {
Directory directory = NIOFSDirectory.open(path);
Analyzer analyzer = new ClassicAnalyzer();
IndexWriterConfig config = new IndexWriterConfig(analyzer);
try (IndexWriter writer = new IndexWriter(directory, config)) {
addDoc(writer, "The quick brown fox jumps over the lazy
dog");
}
try (IndexReader reader = DirectoryReader.open(directory)) {
IndexSearcher searcher = new IndexSearcher(reader);
Query query = new IntervalQuery("content",
Intervals.analyzedText("quick brown fox jumps over
the lazy dog", analyzer, "content", 0, true));
TopDocs topDocs = searcher.search(query, 10);
UnifiedHighlighter.Builder uhBuilder = new
UnifiedHighlighter.Builder(searcher, analyzer)
.withWeightMatches(true);
UnifiedHighlighter highlighter = new
UnifiedHighlighter(uhBuilder);
String[] highlights = highlighter.highlight("content",
query, topDocs, 1);
System.out.println(Arrays.toString(highlights));
}
} catch (IOException e) {
e.printStackTrace();
}
}
private static void addDoc(IndexWriter writer, String content) throws
IOException {
Document doc = new Document();
doc.add(new Field("content", content, textType));
writer.addDocument(doc);
}
```
produces an error:
```
java.lang.IllegalArgumentException: field 'content' was indexed without
offsets, cannot highlight
at
org.apache.lucene.search.uhighlight.FieldHighlighter.highlightOffsetsEnums(FieldHighlighter.java:157)
at
org.apache.lucene.search.uhighlight.FieldHighlighter.highlightFieldForDoc(FieldHighlighter.java:83)
at
org.apache.lucene.search.uhighlight.UnifiedHighlighter.highlightFieldsAsObjects(UnifiedHighlighter.java:944)
at
org.apache.lucene.search.uhighlight.UnifiedHighlighter.highlightFields(UnifiedHighlighter.java:814)
at
org.apache.lucene.search.uhighlight.UnifiedHighlighter.highlightFields(UnifiedHighlighter.java:792)
at
org.apache.lucene.search.uhighlight.UnifiedHighlighter.highlight(UnifiedHighlighter.java:725)
```
A workaround to disable highlighting based on matches:
```java
UnifiedHighlighter.Builder uhBuilder = new
UnifiedHighlighter.Builder(searcher, analyzer)
.withWeightMatches(false);
```
This happens because of `ClassicAnalyzer` that removes stop words, and
because of it usage of `ExtendedIntervalsSource` that returns -1 offsets.
### Version and environment details
Lucene v 9.9.1
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