Ruby on Rails

On OS X Yosemite I get this message at the end of a Rails 5.0.0-RC2 upgrade:

GET
https://api.rubygems.org/api/v1/dependencies?gems=hike,journey,multi_json,rack-cache,rack-mount,tilt
200 OK
ERROR: Error installing rails:
conflicting dependencies activesupport (= 3.0.0) and activesupport (=
5.0.0.rc2)
Activated activesupport-5.0.0.rc2
which does not match conflicting dependency (= 3.0.0)

Conflicting dependency chains:
rails (= 5.0.0.rc2), 5.0.0.rc2 activated, depends on
activesupport (= 5.0.0.rc2), 5.0.0.rc2 activated

versus:
rails (= 5.0.0.rc2), 5.0.0.rc2 activated, depends on
sprockets-rails (>= 2.0.0), 2.0.0 activated, depends on
actionpack (>= 3.0), 3.0.0 activated, depends on
activesupport (= 3.0.0)

Nothing to update


Any ideas?

gvim

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