/usr/lib/ is in libyaml-syck-perl 1.29-1build3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/5.26/YAML/
/usr/lib/x86_64-linux-gnu/perl5/5.26/YAML/Dumper/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.26/
/usr/lib/x86_64-linux-gnu/perl5/5.26/JSON/
/usr/lib/x86_64-linux-gnu/perl5/5.26/JSON/Syck.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/YAML/Dumper/Syck.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/YAML/Loader/
/usr/lib/x86_64-linux-gnu/perl5/5.26/YAML/Loader/Syck.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/YAML/Syck.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/YAML/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/YAML/Syck/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/YAML/Syck/Syck.so