undefined method `chomp' for nil:NilClass (NoMethodError) /public/pub7/home7/oct/html/chaos/tdiary/defaultio.rb:42:in `block in restore_comment' /public/pub7/home7/oct/html/chaos/tdiary/defaultio.rb:39:in `open' /public/pub7/home7/oct/html/chaos/tdiary/defaultio.rb:39:in `restore_comment' /public/pub7/home7/oct/html/chaos/tdiary/defaultio.rb:167:in `transaction' /public/pub7/home7/oct/html/chaos/tdiary.rb:1953:in `initialize' index.rb:59:in `new' index.rb:59:in `<main>'