[split] URI routing in 3.1.1

I found two bugs in URI Routing in version 3.1.1, in version 3.1.0 was no such!

First. If named function same name controller.
Example:

class Bug extends CI_Controller
{

   function bug()
   {
       exit(1);
   }

}
Link http://site/bug/bug does not work!

Second. If add to existing function any URI segment in URL without routes.php not shown error 404.
Example:

http://site/bug/bug/dawdad
http://site/bug/bug/3123
http://site/bug/bug/dawdad/3123/dad/3123/...