This is an example of a serious design flaw in CPAN::Meta::YAML.

It is generally a bad idea to fake out a parsing process. In this case, CPAN::Meta::YAML strips off all lines that look like comments.

It should be easy to find dozens of bugs by looking at the assumptions the code makes and then finding a counter case like this.

That's why I'm working on Tiny::YAML and YAML::Pegex, which are driven by a grammar.