Perl wrongly complaining about Name “main::FILE” used only once

Question

I simplified my program to the following trivial snippet and I\'m still getting the message

Name \"main::FILE\" used only once: possible typo...

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Answer 1

According to the documentation for autodie:

BUGS

"Used only once" warnings can be generated when autodie or Fatal is used with package filehandles (eg, FILE ). Scalar filehandles are strongly recommended instead.

I get the warning on Perl 5.10.1, but not 5.16.3, so there may be something else going on as well.