I think my previous example was perhaps too involved. Here's something simpler that shows the same behavior:

#!/local/bin/perl -w
use warnings;
use strict;

# Start of a big block - don't want to pollute
{
my $y = 222;
my $x = 777;


print "Initialized, what's the values?";
print " x = $x\n";
print " y = $y\n\n";

sub mysub
    {
    print "  Start of subroutine\n";
    print "    what's x? (forget y for now)\n";
    print "    x = $x\n\n";
    print "    Going to child block\n";
    print "     let's inspect the variables again:\n";

    my $sr =             
        sub {
        print "y = $y\n\n";
        print "x = $x\n\n";
        };
    
    &$sr;
    }
}
# Big Block
mysub();
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