Tom Mortimer created LUCENE-7576:
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Summary: RegExp automaton causes NPE on Terms.intersect
Key: LUCENE-7576
URL: https://issues.apache.org/jira/browse/LUCENE-7576
Project: Lucene - Core
Issue Type: Bug
Components: core/codecs, core/index
Affects Versions: 6.2.1
Environment: java version "1.8.0_77" macOS 10.12.1
Reporter: Tom Mortimer
Priority: Minor
Calling org.apache.lucene.index.Terms.intersect(automaton, null) causes an NPE:
String index_path = <path to index>
String term = <a valid term name>
Directory directory = FSDirectory.open(Paths.get(index_path));
IndexReader reader = DirectoryReader.open(directory);
Fields fields = MultiFields.getFields(reader);
Terms terms = fields.terms(args[1]);
CompiledAutomaton automaton = new CompiledAutomaton(
new RegExp("do_not_match_anything").toAutomaton());
TermsEnum te = terms.intersect(automaton, null);
throws:
Exception in thread "main" java.lang.NullPointerException
at
org.apache.lucene.codecs.blocktree.IntersectTermsEnum.<init>(IntersectTermsEnum.java:127)
at
org.apache.lucene.codecs.blocktree.FieldReader.intersect(FieldReader.java:185)
at org.apache.lucene.index.MultiTerms.intersect(MultiTerms.java:85)
...
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