It looks like a closure to me. Based on some really wierd combination of the require and the my variable. Since perl doesn't see that func2 uses the "global" lexical $sep, the variable is not bound to func2. So you end up with a different $sep from the lexical that you think you're seeing.

That said, I get funny results when I change testcall2.pl: 

#!/usr/bin/perl
use strict;
use warnings;
my ($sep, $z);
sub func2 {
    #print "func2: \$sep == $sep\n";
    eval '$z = sub { print "sep == ($sep)\n"; printf "sep => %p\n", \$
+sep}';
    &{$z}();
}
sub func1 {
    $sep = "AB";
    printf "sep => %p\n", \$sep;
    func2();
}
1;

[download]
This shows the address to be the same - although I'm not sure I'm doing that right. However, I think my theory is right based on the fact that if I change "my" to "our", so we're using global variables and not lexicals (thus no more closure), then things work the way we think it should.

In reply to Re: A 'print' at one spot changes a value at another by Tanktalus
in thread A 'print' at one spot changes a value at another by ralphmerridew

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