/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/ is in libanyevent-perl 7.140-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/Cocoa.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/EV.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/Event.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/EventLib.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/FLTK.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/Glib.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/IOAsync.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/Irssi.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/POE.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/Perl.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/Qt.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/Tk.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AnyEvent/Impl/UV.pm