in fact those need to be references due to list flattening. your %hash1 is not built as you want (same for %hash2). you can see this by just printing out your data structures and try to guess what happens: 
use strict;
use Data::Dumper;
my %hash1;
# fill %hash1 here
print Dumper \%hash1;

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In reply to Re: Merging hashes by kabel
in thread Merging hashes by hotshot

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