I'm not sure what you expect. Both output lines are the same:
$ perl 1218891.pl
Scalar value @row[FL2] better written as $row[FL2] at 1218891.pl line
+17.
e n w
e n w
$ perl -v | head
This is perl 5, version 16, subversion 3 (v5.16.3) built for x86_64-li
+nux-thread-multi
(with 25 registered patches, see perl -V for more detail)
Copyright 1987-2012, Larry Wall
Perl may be copied only under the terms of either the Artistic License
+ or the
GNU General Public License, which may be found in the Perl 5 source ki
+t.
Complete documentation for Perl, including FAQ lists, should be found
+on