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  1. or download this
      DB<71> x [qw/a b c/]->[2]                # works like expected
0  'c'
...
0  'a'
  DB<73> x [qw/a b c/]->[0,1]
0  'b'
  2. or download this
      DB<83> x @{[ qw// ]}[0,1]
0  undef
...
  DB<84> x @{[ qw/a b c/ ]}[0,1]
0  'a'
1  'b'