Bunlder Error with Nokogiri and Rails 4.2

this is my gem file.

source 'https://rubygems.org'

Bundle edge Rails instead: gem 'rails', github: 'rails/rails'

gem 'rails', '~> 4.2.0'

Use SCSS for stylesheets

gem 'sass-rails', '~> 5.0'

Use Uglifier as compressor for JavaScript assets

gem 'uglifier', '>= 1.3.0'

Use CoffeeScript for .coffee assets and views

gem 'coffee-rails', '~> 4.1.0'

See https://github.com/sstephenson/execjs#readme for more supported runtimes

gem 'therubyracer', platforms: :ruby

Use jquery as the JavaScript library

gem 'jquery-rails'

Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks

gem 'turbolinks'

Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder

gem 'jbuilder', '~> 2.0'

bundle exec rake doc:rails generates the API under doc/api.

gem 'sdoc', '~> 0.4.0', group: :doc

Use ActiveModel has_secure_password

gem 'bcrypt', '~> 3.1.7'

Use Unicorn as the app server

gem 'unicorn'

Use Capistrano for deployment

gem 'capistrano-rails', group: :development

adding bootstrap for styling

gem 'bootstrap-sass', '3.2.0.0' group :development do # Call 'byebug' anywhere in the code to stop execution and get a debugger console gem 'byebug'

# Access an IRB console on exception pages or by using <%= console %> in views gem 'web-console', '~> 2.0' gem 'spring', '1.1.3' gem 'capistrano', '~> 3.2.1' gem 'capistrano-rails', '~> 1.1.1' gem 'capistrano-bundler', '~> 1.1.2' gem 'capistrano-rbenv', '~> 2.0.2' gem 'capistrano-faster-assets', '~> 1.0' gem 'sqlite3'

end

test group

group :test do gem 'minitest-reporters', '1.0.5' gem 'mini_backtrace', '0.1.3' gem 'guard-minitest', '2.3.1' end

Windows does not include zoneinfo files, so bundle the tzinfo-data gem

gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

production group

group :production do gem 'pg', '0.17.1' gem 'rails_12factor', '0.0.2' #gem 'rails_log_stdout', github: 'heroku/rails_log_stdout' #gem 'rails3_serve_static_assets', github: 'heroku/rails3_serve_static_assets' #gem 'unicorn', '4.8.3' gem 'unicorn', '~> 4.8.3' end

adding gem for password security

gem 'bcrypt'

adding gem for Fake users

gem 'faker', '1.4.2'

adding gem for user pagination

gem 'will_paginate', '3.0.7' gem 'bootstrap-will_paginate', '0.0.10'

adding gem for checkout process

gem 'paypal-sdk-rest'

Add this if you're using rbenv

gem 'capistrano-rbenv', github: "capistrano/rbenv"

/r/rails Thread