I am getting this error while installing rails in osx yosemite 10.10.1
mezbah$ gem install rails --no-ri --no-rdoc
ERROR: Error installing rails:
invalid gem: package is corrupt, exception while verifying: undefined method `size' for nil:NilClass (NoMethodError) in /Users/mezbah/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/cache/nokogiri-1.6.6.2.gem
mezbah$ gem install nokogiri
ERROR: Error installing nokogiri:
invalid gem: package is corrupt, exception while verifying: undefined method `size' for nil:NilClass (NoMethodError) in /Users/mezbah/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/cache/nokogiri-1.6.6.2.gem
Any Idea??