/usr/lib/x86_64-linux-gnu/perl5/5.20/Devel/NYTProf/FileHandle.pm is in libdevel-nytprof-perl 5.06+dfsg-2+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | #!perl
use strict;
use warnings;
package Devel::NYTProf::FileHandle;
# We have to jump through some hoops to load a second XS file from the same
# shared object.
require DynaLoader;
require Devel::NYTProf::Core;
my $c_name = 'boot_Devel__NYTProf__FileHandle';
my $c = DynaLoader::dl_find_symbol_anywhere($c_name);
die "Can't locate '$c_name' in Devel::NYTProf shared object" unless $c;
my $xs = DynaLoader::dl_install_xsub(__PACKAGE__ . '::bootstrap', $c, __FILE__);
&$xs(__PACKAGE__, $Devel::NYTProf::Core::VERSION);
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