$ gem --version
[/home/rohit/.rvm/gems/[email protected]/specifications/net-ssh-2.5.2.gemspec] isn't a Gem::Specification (NilClass instead).
[/home/rohit/.rvm/gems/[email protected]/specifications/net-sftp-2.0.5.gemspec] isn't a Gem::Specification (NilClass instead).
[/home/rohit/.rvm/gems/[email protected]/specifications/net-ssh-gateway-1.1.0.gemspec] isn't a Gem::Specification (NilClass instead).
[/home/rohit/.rvm/gems/[email protected]/specifications/net-scp-1.0.4.gemspec] isn't a Gem::Specification (NilClass instead).
RVM 1.12.3, RubyGems 1.8.22, & Ruby 1.9.3을 사용하십시오.gem --version 이후에 실행할 때 "Gem :: Specification (NilClass 대신)"이 표시되지 않습니다.
왜이 오류가 발생합니까?