/usr/lib/x86_64-linux-gnu/ is in libnet-idn-encode-perl 2.400-1build1.
This file is owned by root:root, with mode 0o755.
..
/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/Net/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/Encode.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/Overview.pod
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/Punycode/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/Punycode/PP.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/Punycode.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/Standards.pod
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/UTS46/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/UTS46/_Mapping.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/Net/IDN/UTS46.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Net/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Net/IDN/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Net/IDN/Punycode/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Net/IDN/Punycode/Punycode.bs
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Net/IDN/Punycode/Punycode.so