/usr/lib/x86_64-linux-gnu/perl5/ is in libapt-pkg-perl 0.1.29+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/5.20/
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/Source.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/hash.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/System.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/Config.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/Config.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/Policy.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/PkgRecords.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/Version.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg/Cache.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/AptPkg/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/AptPkg/AptPkg.so
/usr/lib/x86_64-linux-gnu/perl5/5.20/AptPkg.pm