rack-2.0.1 is the only slotted rack that only supports ruby 21, 22, 23. This is causing a blocker because rake-test-0.6.3 still has at ruby20 target. Disabling the ruby20 target is rake-test breaks actionpack:4.0 which is still needed as a reverse dependency of metasploit. I worked around the issue by adding ruby20 to the list of supporting rubies is the ebuild.
(In reply to Harris Landgarten from comment #0) > I worked around the issue by adding ruby20 to the list of supporting rubies > is the ebuild. This may happen to work for you depending on what components you need but this version of rack is not compatible with ruby20, so we can't add ruby20 to the ebuild in the tree. It's probably best to stop using ruby 2.0 since that version is no longer supported upstream, see bug 576034. Finally, I'm not sure what problem you are having with this, and how this can result in a blocker.
Closing since this version is no longer available and rack-test no longer has a ruby20 target.
