check @there if it is nil to prevent infinite loop
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36998 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
check @there if it is nil to prevent infinite loop
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36998 b2dd03c8-39d4-4d8f-98ff-823fe69b080e