$x = "x";
$y = "y";

sub uc_call {
    my $x    = uc $x;
    local $y = uc $y;
    shift->();
}

my $code = sub { print "$x $y\n" };
uc_call($code);
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The above prints lower-case "x" but upper-case "Y", which illustrates that even without strictures, there's a difference between local and my.