cross reference in perl Data::Dumper

Code below is not fully tested, but it shows one feature of Data::Dumper — cross reference. Basically, $b content won't get dumped.
Dumper will show $b is an alias of (another pointer) @a.

If you don't want cross reference, then call Dumper() multiple times, each with a single argument.

use Data::Dumper

@a=(1);
$b = @a;

print Dumper @a, $b

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