This is an OS X Homebrew install, with rbenv root in /usr/local/var/rbenv; Ruby 2.0.0, and Rails 4.0.0. ‘gem install rails’ went without complaint. Then I tried to run ‘rails new hypothetical_app’. That, and all calls to the rails app, show that app_rails_loader is finding a directory bin/rails where it expects to find a file bin/rails:
/usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/app_rails_loader.rb:34:in
read': Is a directory - bin/rails (Errno::EISDIR) from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/app_rails_loader.rb:34:in ``from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/app_rails_loader.rb:34:in
block in exec_app_rails’
from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/app_rails_loader.rb:32:inloop' from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/app_rails_loader.rb:32:in ``from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/app_rails_loader.rb:32:in
exec_app_rails’
from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/cli.rb:6:in<top (required)>' from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in ``from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in
require’
from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:inrequire' from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/railties-4.0.0/bin/rails:9:in ``from /usr/local/var/rbenv/versions/2.0.0-p195/lib/ruby/gems/2.0.0/gems/railties-4.0.0/bin/rails:9:in
’
from /usr/local/var/rbenv/versions/2.0.0-p195/bin/rails:23:inload' from /usr/local/var/rbenv/versions/2.0.0-p195/bin/rails:23:in ``from /usr/local/var/rbenv/versions/2.0.0-p195/bin/rails:23:in
’
Aside from not setting my rbenv root to ~/.rbenv, I can’t think of any departures I have made from completely standard installation of everything.