I'm attempting to build the data structure shown below that will be passed to a nested LOOP in HTML::Template. 
$OUTER_Ref = [
  {
    'INNER' => [
      { 'DATA' => 'data01' },
      { 'DATA' => 'data02' },
    ]
  },
  {
    'INNER' => [ 
      { 'DATA' => 'data11' },
      { 'DATA' => 'data12' },
    ]
  },
];

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I can up with this simplfied snippet to build the structure but I'm getting an unexpected reference to an undefined value and it's not getting all the values. 
use strict;
use Data::Dumper;

my @outer = ();
my @inner = ();
my $n = 0;
while (<DATA>) {
    chomp;
    push @inner, { DATA => $_ };
    if ($n == 1) {
        push @outer, { 'INNER' => @inner };
        @inner = ();
        $n = 0;
    } else { $n++; }
}
print Dumper(\@outer);

__DATA__
data01
data02
data11
data12

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In reply to Nested LOOP in HTML::Template by nedals

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