Description:
------------
When a class constructor argument has both a visibility modifier and an attribute, and that attribute has at least one argument, the PHP interpreter crashes when attempting to compile it. This is due to the AST node for the attribute being used twice, once to create a parameter attribute and once to create a class property attribute.

The linked pull request fixes this bug by creating a temp copy of the attrib AST to use for the class property. 

https://github.com/php/php-src/pull/5891

Test script:
---------------
<?php

<<Attribute>>
class B {
    public function __construct($value)
    {
    }
}

class A {
    public function __construct(
        <<B(12)>> public $b
    )
    {
    }
}


Expected result:
----------------
No output; php parser is able to process the file

Actual result:
--------------
Crash with ZEND_ASSERTION_FAILED.