Invalid gemspec in [/var/vcap/data/dea/apps/mvmap-0-0d7d5610c53756685ebfc69bcc3f b5b7/app/rubygems/ruby/1.9.1/specifications/carrierwave-0.6.2.gemspec]: Illforme d requirement ["#Syck::DefaultKey:0x00000001721158 1.1.4"] Invalid gemspec in [/var/vcap/data/dea/apps/mvmap-0-0d7d5610c53756685ebfc69bcc3f b5b7/app/rubygems/ruby/1.9.1/specifications/carrierwave-0.6.2.gemspec]: Illforme d requirement ["#Syck::DefaultKey:0x00000001721158 1.1.4"] [31mCould not find carrierwave-0.6.2 in any of the sources[0m

高手指点下，为什么？