my $code = 'sub { my $arg = shift; warn $arg; }';

##</code><code>##

use Safe;

my $code = 'sub { my $arg = shift; warn $arg; }';

my $safe = Safe->new();

my $ssub = $safe->reval( $code) || die ;

$ssub->( "hello$/" );
&$ssub( "hello$/" );