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    package Chess::PGN::EPD;
    
    ...
    unless (-d $db_dir_qfn) {
        $db_dir_qfn = realpath('db');
    }
    
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    Use of uninitialized value in -d at /home/sand/.cpan/build/Chess-PGN-E
    +PD-0.28-WRroyj/blib/lib/Chess/PGN/EPD.pm line 22.
    t/01_epdcode.t ...... ok
    ...
        usually optimized into "that " . $foo, and the warning will refer 
    +to
        the concatenation (.) operator, even though there is no . in your
        program.