Description:
------------
Failure to load a WSDL file using the SoapClient class causes more than just an exception. The error is also caught by the error handler and a 500 status code is sent back.

This error is classified as a PHP Fatal error and can't be caught by any custom error handlers.

This error shouldn't be triggered at all, that's what we have exceptions for ;-)

Reproduce code:
---------------
<?php

try {
  $s = new SoapClient('http://localhost/invalid_wsdl');
} catch (Exception $e) {
  echo $e->getMessage();
}

?>


Expected result:
----------------
SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://localhost/invalid_wsdl'

Actual result:
--------------
[HTTP/1.x 500 Internal Server Error]
PHP Fatal error:  SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://localhost/invalid_wsdl' in /var/www/html/test.php on line 4
SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://localhost/invalid_wsdl'