php_phongo_dispatch_handlers() currently iterates over all registered subscribers and invokes event handlers using zend_call_method(). In the event that an exception is thrown from an event handler, we rely on zend_call_function() to no-op; however, we will continue to loop through the subscribers and make repeated calls to zend_call_method().

If the exception is thrown during a command started handler, php_phongo_dispatch_handlers() will still be called for the subsequent command succeeded/failed event and make additional zend_call_method() calls, which will again no-op.

It would be prudent to check for an exception before calling zend_call_method() in php_phongo_dispatch_handlers() and break out of the subscriber iteration so that we can return early.