Except that's not a symbolic reference. That's a hash-reference and your code is more commonly written as: 
sub go_through {
    my ($self, $node) = @_;
    return unless defined $node->{info};

    my @info_nodes;
    while ( $node->{info} ne 'root' ) {
        push @info_nodes, $node->{info};
        $node = $node->{parent};
    }

    return \@info_nodes;
}

[download]
This version also fixes a bug you had in your original code regarding contexts.
My criteria for good software:
  1. Does it work?
  2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?

In reply to Re^3: Invoke sub whose name is value of scalar by dragonchild
in thread Invoke sub whose name is value of scalar by andreas1234567

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