Throwing exception with double newline causes PHP Warning and return code 200

[bartek75]

Example:
throw new \ZfrRest\Http\Exception\Client\ConflictException("UniqueConstraintViolationException\n\n ss");
in controller causes:

< HTTP/1.1 200 OK
< Date: Mon, 28 Mar 2016 18:21:56 GMT
< Server: Apache/2.4.9 (Win32) PHP/5.5.12
< Access-Control-Allow-Origin: *
< Access-Control-Allow-Methods: POST, GET, PUT, OPTIONS, PATCH, DELETE
< Access-Control-Allow-Headers: X-Accept-Charset,X-Accept,Content-Type,app,key
< X-Powered-By: PHP/5.5.12
< Content-Length: 5736
< Content-Type: application/json

< /tr> < /tr>

( ! ) Warning: Header may not contain more than a single header, new line detected in C:\git\4inspector\server\vendor\zendframework\zend-mvc\src\ResponseSender\AbstractResponseSender.ph p on line 39
Call Stack
#	Time	Memory	Function	Location
1	0.0007	139640	{main}( )	..\index.php:0
2	0.1431	5071928	Zend\Mvc\Application->run( )	..\index.php:21
3	0.4733	12107616	Zend\EventManager\EventManager->trigger( )	. .\Application.php:321
4	0.4733	12107688	Zend\EventManager\EventManager->triggerListeners( )	..\EventManager.php:205
5	0.4735	12109040	call_user_func:{C:\git\4inspector\server\vendor\zendframework\zend-eventmanager\src\EventManager.php:444} ( )	..\EventManager.php:444
6	0.4735	12109120	Zend\Mvc\SendResponseListener->sendResponse( )	..\EventManager.php:444
7	0.4736	12109832	Zend\EventManager\EventManager->trigger( )	..\SendResponseListener.php:94
8	0.4736	12109976	Zend\EventManager\EventManager->triggerListeners( )	..\EventManager.php:205
9	0.4738	12111528	call_user_func:{C:\git\4inspector\server\vendor\zendframework\zend-eventmanager\src\EventManager.php:444} ( )	..\EventManager.php:444
10	0.4738	12111592	Zend\Mvc\ResponseSender\HttpResponseSender->__invoke( )	..\EventManager.php:444
11	0.4738	12111680	Zend\Mvc\ResponseSender\AbstractResponseSender->sendHeaders( )	..\HttpResponseSender.php:46
12	0.4747	12166976	header ( )	..\AbstractResponseS ender.php:39

{"status_code":409,"message":"UniqueConstraintViolationException\n\n ss"}\* Connection #0 to host left intact