Weird, works for me: 
Perl 5.018002
Memoize  1.03
Tempdir  /tmp
Tempfile 5.018002_memoize_fib
Filesize 12288 bytes
Question 8
Answer 21

$%cache = {
            '0' => '0',
            '2' => '1',
            '4' => '3',
            '6' => '8',
            '1' => '1',
            '3' => '2',
            '5' => '5',
            '7' => '13'
          };

[download]
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

In reply to Re: Memoize problem with old Perl by choroba
in thread Memoize problem with old Perl by Anonymous Monk

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