Description:
------------
When creating a SOAP client on a non-existing WSDL file, there will be an fatal error when xdebug is installed. In other cases it throws an Exception.

PHP Fatal error:  SOAP-ERROR: Parsing WSDL: Couldn't load from 'abc' : failed to load external entity "abc"

vs.

class SoapFault#3 (10) {
  protected $message =>
  string(90) "SOAP-ERROR: Parsing WSDL: Couldn't load from 'abc' : failed to load external entity "abc"\n"
...

Test script:
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try { $a = new SoapClient('abc'); } catch (Exception $e) { var_dump($e); }

Expected result:
----------------
Same error, independent from installed extensions (ideal case: Exception because it's catchable)