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    #!/usr/bin/perl -w
    #
    ...
            print "--> $key: $p{$key}\n";
        }
    }
    
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    Code before warnings are enabled at line 9, column 1.  See page 431 of
    + PBP.  (Severity: 4)
    Always unpack @_ first at line 19, column 1.  See page 178 of PBP.  (S
    +everity: 4)
    Subroutine "baz" does not end with "return" at line 19, column 1.  See
    + page 197 of PBP.  (Severity: 4)