/usr/lib/x86_64-linux-gnu/perl5/ is in libevent-perl 1.23-1+b1.
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/Event.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/Event/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/Event/Event.so
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/timer.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/MakeMaker.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/typemap
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/var.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/EventAPI.h
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/idle.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/group.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/generic.pod
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/generic.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/type.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/Watcher.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/io.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Event/signal.pm