my $global;

{
    my $local_outer;

    # $global known here
    # $local_outer known here
    # $local_inner unknown here

    {
        my $local_inner;

        # $global known here
        # $local_outer known here
        # $local_inner known here
    }

    # $global known here
    # $local_outer known here
    # $local_inner unknown here

    # An entirely different $local_inner:
    my $local_inner;
}

# $global known here
# $local_outer unknown here
# $local_inner unknown here

# An entirely different $local_outer:
my $local_outer;

# An entirely different $local_inner:
my $local_inner;