jpountz commented on issue #14517:
URL: https://github.com/apache/lucene/issues/14517#issuecomment-2816267241
You are correct. Here is the simplest recreation of the bug I could come up
with:
```java
Directory dir = new ByteBuffersDirectory();
IndexWriter w = new IndexWriter(dir, new IndexWriterConfig());
// high max doc to have a high number of unique values so that the
competitive iterator is
// initialized with `docsWithField` rather than specific (< 1024) terms
int maxDoc = 5_000;
for (int i = 0; i < maxDoc; ++i) {
Document doc = new Document();
// We need the field to be sparse, so that the competitive iterator is
initialized with
// `docsWithField`
if (i % 2 == 0) {
doc.add(new StringField("field", "value", Store.NO));
doc.add(new KeywordField("sort", Integer.toString(i), Store.NO));
}
w.addDocument(doc);
}
w.forceMerge(1);
w.close();
DirectoryReader reader = DirectoryReader.open(dir);
LeafReaderContext context = reader.leaves().get(0);
IndexSearcher searcher = new IndexSearcher(reader);
Query query = new TermQuery(new Term("field", "value"));
Weight weight = searcher.createWeight(query, ScoreMode.COMPLETE_NO_SCORES,
RANDOM_MULTIPLIER);
SortField sortField = KeywordField.newSortField("sort", false,
SortedSetSelector.Type.MIN);
sortField.setMissingValue(SortField.STRING_LAST);
Sort sort = new Sort(sortField);
Collector collector = new TopFieldCollectorManager(sort, 10,
10).newCollector();
LeafCollector leafCollector = collector.getLeafCollector(context);
BulkScorer bulkScorer = weight.bulkScorer(context);
// We need to split on this specific doc ID so that the current doc of the
competitive iterator
// and the current doc of `docsWithField` are out of sync, because the
competitive iterator was
// just updated.
bulkScorer.score(leafCollector, null, 0, 22);
bulkScorer.score(leafCollector, null, 22, maxDoc);
```
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