perl -we "use strict; open FH, '>', 'text.txt'; open FH, '>', 'text.txt';"

perl -we "use strict; open my $fh, '>', 'text.txt'; open my $fh, '>', 'text.txt';"
"my" variable $fh masks earlier declaration in same scope at -e line 1.


##</code><code>##

use strict;

open FH, '<', 'filename'; # dies
open my $fh, 'filename';  # dies

no strict 'open';

open FH, '<', 'filename'; # now ok
open my $fh, 'filename';  # now ok