I want to compile an anonymous subroutine within a Safe compartment, and then execute it from outside. This does not seem to work correctly. If I create a compartment that forbids file operations, and compile an anonymous subroutine that uses IO::File to open a file, it executes properly without complaint: 
my $code =<<'END';
sub {
    my $a = '';
    my $f = IO::File->new('/etc/passwd');
    while (my $l = $f->getline) { $a .= $l }
    return $a;
}
END
my $compartment = Safe->new(':default');
$safe = $compartment->reval($code);
print $safe->();

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If I replace IO::File->new with a direct call to open(), then the call is trapped, as desired. Is there a way to prevent anonymous subs defined within Safe compartments from invoking Class methods?

In reply to How to use Safe to compile anonymous subs by lstein

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