You forgot how CGI::Vars works, https://metacpan.org/module/CGI::Struct#Auto-arrays doesn't account for it 

#!/usr/bin/perl --
use strict; use warnings;
use Data::Dump;
use CGI;
use CGI::Struct;


my $q = CGI->new('row[]=row;row[]=row;row[]=row;row[]=your boat');

my %qVars = $q->Vars;

my @errors;
my $struct = build_cgi_struct \%qVars, \@errors;

dd $q, \%qVars, $struct, \@errors;

### WORKAROUND for stupid Vars (must've written this line 100 times)
%qVars = map { $_ => [ $q->param($_) ] } $q->param;
dd \%qVars;
$struct = build_cgi_struct \%qVars, \@errors;
dd $struct, \@errors;
__END__
(
  bless({
    ".charset"     => "ISO-8859-1",
    ".fieldnames"  => {},
    ".iterator"    => 2,
    ".parameters"  => ["row[]"],
    "escape"       => 1,
    "param"        => { "row[]" => ["row", "row", "row", "your boat"] 
+},
    "use_tempfile" => 1,
  }, "CGI"),
  { "row[]" => "row\0row\0row\0your boat" },
  { row => ["row\0row\0row\0your boat"] },
  [],
)
{ "row[]" => ["row", "row", "row", "your boat"] }
({ row => ["row", "row", "row", "your boat"] }, [])

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In reply to Re^3: Building data structures from CGI params by Anonymous Monk
in thread Building data structures from CGI params by fullermd

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