module ActionController::Rescue 
        Action Controller Rescue
This module is responsible for providing rescue_from to controllers, wrapping actions to handle configured errors, and configuring when detailed exceptions must be shown.
Inherits From
- 
          module
          
ActiveSupport::Rescuable  
Public instance methods
Override this method if you want to customize when detailed exceptions must be shown. This method is only called when consider_all_requests_local is false. By default, it returns false, but someone may set it to request.local? so local requests in production still show the detailed exception pages.
Source code GitHub
# File actionpack/lib/action_controller/metal/rescue.rb, line 21
def show_detailed_exceptions?
  false
end