It doesn't fail for me with Perl 5.8.7.
My best guess is that your input had a blank line in it at the start or the end. That blank line would (legitimately from the spec) result in the output that you saw.
Are you posting in the right place? Check out Where do I post X? to know for sure.
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Want more info? How to link
or How to display code and escape characters
are good places to start.