我最近安装了Bullet gem版本5.6，以便在Rails 4.2（Ruby 2.2.3）应用程序上检测N + 1个查询。
我注意到我收到以下错误消息：
fatal - No live threads left. Deadlock?:
actionpack (4.2.4) lib/action_controller/metal/live.rb:154:in `each'
actionpack (4.2.4) lib/action_dispatch/http/response.rb:52:in `each'
actionpack (4.2.4) lib/action_dispatch/http/response.rb:220:in `body'
actionpack (4.2.4) lib/action_dispatch/http/response.rb:371:in `body'
bullet (5.6.0) lib/bullet/rack.rb:71:in `response_body'
bullet (5.6.0) lib/bullet/rack.rb:36:in `empty?'
bullet (5.6.0) lib/bullet/rack.rb:16:in `call'
jquery-fileupload-rails (0.4.6) lib/jquery/fileupload/rails/middleware.rb:14:in `_call'
jquery-fileupload-rails (0.4.6) lib/jquery/fileupload/rails/middleware.rb:10:in `call'
请提供任何线索