As to why?

Get stricter with use warnings FATAL => 'all';

sometimes when you get "use of unitialized value" , the value is absolutely critical to the proper functioning of the program, so the program should end , no exceptions:D

In reply to Re^2: Difference Between use warnings and use warnings FATAL => 'all' by Anonymous Monk
in thread Difference Between use warnings and use warnings FATAL => 'all' by Jim

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