(またしても日本語は下にあります / Japanese follows English)
You can try feature of Perl::Lint easier on this playground.
However this and Perl::Lint have not been completed yet, so possibly results are vague.
(e.g. Now, source code that was written in this playground is not file in spite of playground warns by policy of file path. I think there is more problems...)
For now, please play here and tell me your mind.