Michał Słomkowski created LUCENE-9524:
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Summary: NullPointerException in IndexSearcher.explain() when
using ComplexPhraseQueryParser
Key: LUCENE-9524
URL: https://issues.apache.org/jira/browse/LUCENE-9524
Project: Lucene - Core
Issue Type: Bug
Components: core/queryparser, core/search
Affects Versions: 8.6.2, 8.6
Reporter: Michał Słomkowski
I get NPE when I use {{IndexSearcher.explain()}}. Checked with Lucene 8.6.0
and 8.6.2.
The query: {{(lorem AND NOT "dolor lorem") OR ipsum}}
The text: {{dolor lorem ipsum}}
Stack trace:
{code}
java.lang.NullPointerException at
java.util.Objects.requireNonNull(Objects.java:203)
at org.apache.lucene.search.LeafSimScorer.<init>(LeafSimScorer.java:38)
at
org.apache.lucene.search.spans.SpanWeight.explain(SpanWeight.java:160)
at org.apache.lucene.search.BooleanWeight.explain(BooleanWeight.java:87)
at org.apache.lucene.search.BooleanWeight.explain(BooleanWeight.java:87)
at
org.apache.lucene.search.IndexSearcher.explain(IndexSearcher.java:716)
at
org.apache.lucene.search.IndexSearcher.explain(IndexSearcher.java:693)
{code}
Minimal example code:
{code:java}
val analyzer = new StandardAnalyzer();
val query = new ComplexPhraseQueryParser("", analyzer).parse(queryString);
final MemoryIndex memoryIndex = new MemoryIndex(true);
memoryIndex.addField("", text, analyzer);
final IndexSearcher searcher = memoryIndex.createSearcher();
final TopDocs topDocs = searcher.search(query, 1);
final ScoreDoc match = topDocs.scoreDocs[0];
searcher.explain(query, match.doc);
{code}
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