/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/ is in libdevel-cover-perl 1.17-1+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Compilation.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Html.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Html_basic.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Html_minimal.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Html_subtle.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Json.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Sort.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Text.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Text2.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/Cover/Report/Vim.pm