Issue running specs with Rails beta installed

[mrgilman]

I installed Rails 4.2.0.beta4 on my machine, and wasn't able to run the specs for suspenders with Rails version 4.1.7. The error was LoadError: cannot load such file -- active_job/railtie.

I think this is because of the use of Bundler.with_clean_env here -- Bundler will use the newest version of Rails on my machine instead of the one specified in the Gemfile. The application.rb template comes from Rails 4.2, which includes the active_job/railtie directory, while 4.1 does not.

I think that removing the with_clean_env block has other consequences, so I'm not sure what the fix is.

[jferris]

We previously had issues with Suspenders picking up odd versions of Rails, but I thought this was fixed. See #365 for the lengthy discussion and debugging process.

What version of Ruby gems do you have installed? I think there was a bug with prereleases which was fixed in 2.4.2.

[mrgilman]

Upgrading rubygems seems to fix it -- I was on 2.2.2. Thanks.