perl-mode's indenting get confused on multiple level brackets

[S P Arif Sahari Wibowo]

I noticed that on multiple level brackets for complex data structure
perl-mode get confused, such like this:

$a= {
    'A' => {
        '1' =>
            [
             'a ... some long lines',
             'b ... some long lines'
             ],
                 '2' => 'wrong indentation',
             },
                 'B' => 'also wrong indentation',
             };

Is there any fix, yet? Or any hint on fixing it myself? The easiest way is
just regard brackets as the same treatment as curly brackets. I look into
the perl-mode.elc and it didn't seems easy to do it.

I use emacs 20.7.

Thank you.

-- 
                                   S P Arif Sahari Wibowo
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