Ich musste kürzlich Ruby on Rails neu installieren. Als ich versuchte, den Server für ein Projekt zu starten, an dem ich bereits vor dieser Neuinstallation gearbeitet hatte, erhielt ich die folgende Fehlermeldung:
$ ruby script/server
=> Booting WEBrick...
./script/../config/../vendor/rails/railties/lib/rails/gem_dependency.rb:107:in `requirement': undefined method `version_requirements' for #<Gem::Dependency:0xb74bf764> (NoMethodError)
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:292:in `check_gem_dependencies'
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:292:in `map'
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:292:in `check_gem_dependencies'
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:165:in `process'
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:112:in `send'
from ./script/../config/../vendor/rails/railties/lib/initializer.rb:112:in `run'
from /media/78C0-455B/bidmc/schedule/config/environment.rb:13
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
from /media/78C0-455B/bidmc/schedule/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:in `require'
from /media/78C0-455B/bidmc/schedule/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:in `new_constants_in'
from /media/78C0-455B/bidmc/schedule/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:in `require'
from /media/78C0-455B/bidmc/schedule/vendor/rails/railties/lib/commands/servers/webrick.rb:59
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
from /media/78C0-455B/bidmc/schedule/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:in `require'
from /media/78C0-455B/bidmc/schedule/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:in `new_constants_in'
from /media/78C0-455B/bidmc/schedule/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:in `require'
from /media/78C0-455B/bidmc/schedule/vendor/rails/railties/lib/commands/server.rb:49
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
from script/server:3
Ich habe die neuesten Versionen von Ruby, Rubygems und Rails.
Irgendwelche Vorschläge?
Danke.