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  1. or download this
    > perl -w -Mstrict -e"my%f;++@f{(1,2)};die'ack'if foo eq 'bar'"
    Bareword "foo" not allowed while "strict subs" in use at -e line 1.
    ...
    > perl -w -Mstrict -e"my%f;++@f{1..2};die'ack'if foo eq 'bar'"
    
    >
    
  2. or download this
    > perl -w -MO=Terse -Mstrict -e"my%f;++@f{1..2};die'ack'if foo eq 'bar
    +'"
    LISTOP (0x182015c) leave [1]
    ...
                    SVOP (0x3c4018) const  SPECIAL #0 Nullsv
    
    >
    
  3. or download this
    .