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  1. or download this
    $ perl -wMstrict -le 'sub foo { return @_; }
 ;;
...

ARRAY(0xada8b410)
$
  2. or download this
      DB<12> use strict;print  @$b
Can't use an undefined value as an ARRAY reference at (eval 39)[/data/
+data/com.termux/files/usr/lib/perl5/5.28.2/perl5db.pl:738] line 2.
...
  DB<14> p $b
ARRAY(0xb0a92180)
  DB<15>