... but it doesn't.

What does it do? (This is nearly always a more useful metric :)

I ask, because for me, (in the absence of strict), it works as expected whether I use globals or lexicals:

$foo = 'foo';;
$bar = 'f';;
print ${ $bar . 'oo' };;
foo

{ 
    my $foo = 'foo'; 
    my $bar = 'f'; 
    print ${ $bar . 'oo' }; 
}
foo
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