dev-perl/
Hash-NoRef

Hash to store values without increasing reference count (weak references)

https://metacpan.org/release/Hash-NoRef

There are no pull requests

You think something is missing here?
Start with filling a new pull requests.

If you also like to help the Gentoo project, you can consider sending a Pull Request via GitHub.
Before doing so, you might want to take a look at the wiki page.