/usr/local/lib/ruby/2.3.0/irb/completion.rb:10:in require': cannot load such file -- readline (LoadError) from /usr/local/lib/ruby/2.3.0/irb/completion.rb:10:in '来自/usr/local/bundle/gems/railties-4.2.6/lib/rails/commands/console.rb： 3：in require' from /usr/local/bundle/gems/railties-4.2.6/lib/rails/commands/console.rb:3:in 'from /usr/local/bundle/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:123:in require' from /usr/local/bundle/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:123:in require_command！'来自/usr/local/bundle/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:58:in console' from /usr/local/bundle/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in run_command！'来自/usr/local/bundle/gems/railties-4.2.6/lib/rails/commands.rb:17:in <top (required)>' from bin/rails:4:in require ' from bin/rails:4:in `'