I went along a different route:

#!/usr/bin/perl

use strict;
use warnings;
use Data::Dumper;

my ($hash_ref, $var1, $var2);
print "\n------This is my test of Data Dumper------\n\n";

$var1->{'temp'} = '123';

push (@{$hash_ref->{'test1'}}, $var1);
push (@{$hash_ref->{'test2'}}, $var1);
warn Dumper($hash_ref);

$var2->{'temp2'} = '123';
warn Dumper($hash_ref), "\n\n";
print "----------------------------------------------\n";

exit;
[download]

Update: Using Data::Dump::Streamer instead:

#!/usr/bin/perl

use strict;
use warnings;
use Data::Dump::Streamer;

my ($hash_ref, $var1, $var2);
print "\n------This is my test of Data Dumper------\n\n";

$var1->{'temp'} = '123';

push (@{$hash_ref->{'test1'}}, $var1);
push (@{$hash_ref->{'test2'}}, $var1);
warn Dump($hash_ref);

$var2->{'temp2'} = '123';
warn Dump($hash_ref), "\n\n";
print "----------------------------------------------\n";

exit;
[download]

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