mitchellh/vagrant — pull request #2420 by tmacedo (2013-10-25 09:32:14+00:00)
Title: compatibility with rubygems 2.x

This patch makes the vagrant plugin system compatible with Rubygems 2.x. Even though the Vagrant bundles Rubygems, this makes integration in some platforms that don't have "official" packages (like Gentoo) easier. It should also help for when you decide to upgrade the bundled Rubygems version.

I will try to get that Rubygems bug patched upstream.