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    Use of uninitialized value in addition (+) at...
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    use strict; 
use warnings; 
...
    }; 
    return *inner; 
}
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    $ perl func_template2.pl
$addpiece = 20
...
$addpiece = 555
Subroutine main::inner redefined at func_template2.pl line 15.
result f2 = 565