/usr/share/perl5/KiokuDB/Backend/ is in libkiokudb-perl 0.56-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/KiokuDB/Backend/Hash.pm
/usr/share/perl5/KiokuDB/Backend/Role/
/usr/share/perl5/KiokuDB/Backend/Role/BinarySafe.pm
/usr/share/perl5/KiokuDB/Backend/Role/Broken.pm
/usr/share/perl5/KiokuDB/Backend/Role/Clear.pm
/usr/share/perl5/KiokuDB/Backend/Role/Concurrency/
/usr/share/perl5/KiokuDB/Backend/Role/Concurrency/POSIX.pm
/usr/share/perl5/KiokuDB/Backend/Role/GC.pm
/usr/share/perl5/KiokuDB/Backend/Role/Prefetch.pm
/usr/share/perl5/KiokuDB/Backend/Role/Query/
/usr/share/perl5/KiokuDB/Backend/Role/Query.pm
/usr/share/perl5/KiokuDB/Backend/Role/Query/GIN.pm
/usr/share/perl5/KiokuDB/Backend/Role/Query/Simple/
/usr/share/perl5/KiokuDB/Backend/Role/Query/Simple.pm
/usr/share/perl5/KiokuDB/Backend/Role/Query/Simple/Linear.pm
/usr/share/perl5/KiokuDB/Backend/Role/Scan.pm
/usr/share/perl5/KiokuDB/Backend/Role/TXN/
/usr/share/perl5/KiokuDB/Backend/Role/TXN.pm
/usr/share/perl5/KiokuDB/Backend/Role/TXN/Memory/
/usr/share/perl5/KiokuDB/Backend/Role/TXN/Memory.pm
/usr/share/perl5/KiokuDB/Backend/Role/TXN/Memory/Scan.pm
/usr/share/perl5/KiokuDB/Backend/Role/TXN/Nested.pm
/usr/share/perl5/KiokuDB/Backend/Role/UnicodeSafe.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/
/usr/share/perl5/KiokuDB/Backend/Serialize.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/Delegate.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/JSON.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/JSPON/
/usr/share/perl5/KiokuDB/Backend/Serialize/JSPON.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/JSPON/Collapser.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/JSPON/Converter.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/JSPON/Expander.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/Memory.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/Null.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/Storable.pm
/usr/share/perl5/KiokuDB/Backend/Serialize/YAML.pm
/usr/share/perl5/KiokuDB/Backend/TypeMap/
/usr/share/perl5/KiokuDB/Backend/TypeMap/Default/
/usr/share/perl5/KiokuDB/Backend/TypeMap/Default.pm
/usr/share/perl5/KiokuDB/Backend/TypeMap/Default/JSON.pm
/usr/share/perl5/KiokuDB/Backend/TypeMap/Default/Storable.pm