a) refer 'perl' in their Makefile, or
b) have a directory name of p5-*, or
c) have any dependency on any p5-* package
Like last time, where this caused no complaints.
Plack::Middleware::Test::StashWarnings is a Plack middleware
component to record warnings generated by your application so that
you can test them to make sure your application complains about
the right things.