Description:
------------
getAttributes segfault on dynamic properties

Test script:
---------------
class Foobar {

}

$foobar = new Foobar();
$foobar->bar = 42;

$reflectionObject = new ReflectionObject($foobar);
$reflectionProperty = $reflectionObject->getProperty('bar');
$reflectionProperty->getAttributes();

Expected result:
----------------
Nothing

Actual result:
--------------
AH00052: child pid 40 exit signal Segmentation fault (11)