Description:
------------
Do not handle the exception in the exception.

Test script:
---------------
set_exception_handler(function($e){
 set_exception_handler(function($e){echo $e->getMessage();});
 echo $e->getMessage();
 throw new Exception('Fail 2');
});
throw new Exception('Fail 1');

Expected result:
----------------
Fail 1
Fail 2

Actual result:
--------------
Fail 1
Fatal error: Uncaught exception 'Exception' with message 'Fail 2' in ...