no strict 'refs';
${"old_$_"} = $old->getfield($_) foreach $old->fields;
${"new_$_"} = $new->getfield($_) foreach $new->fields;
no strict 'refs';
${"old_$_"} = $old->getfield($_) foreach $old->fields;
${"new_$_"} = $new->getfield($_) foreach $new->fields;