/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/ is in liblucy-perl 0.3.3-7+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/BackgroundMerger.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/BackgroundMerger.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DataReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DataReader.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DataWriter.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DataWriter.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DeletionsReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DeletionsWriter.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DeletionsWriter.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DocReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DocReader.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DocVector.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/DocWriter.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/FilePurger.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/HighlightReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/HighlightWriter.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/IndexManager.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/IndexManager.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/IndexReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/IndexReader.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Indexer.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Indexer.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Inverter.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Lexicon.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Lexicon.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/LexiconReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/LexiconReader.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/LexiconWriter.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/PolyLexicon.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/PolyReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/PolyReader.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Posting/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Posting.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Posting/MatchPosting.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Posting/RichPosting.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Posting/ScorePosting.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/PostingList.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/PostingList.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/PostingListReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/PostingListReader.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/PostingListWriter.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/SegLexicon.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/SegPostingList.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/SegReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/SegReader.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/SegWriter.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/SegWriter.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Segment.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Segment.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Similarity.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Similarity.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Snapshot.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/Snapshot.pod
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/SortCache.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/SortReader.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/SortWriter.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/TermInfo.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Lucy/Index/TermVector.pm