Description:
------------
If class B, extends Class A, and class B calls Class A's constructor in its own contructor by using call_user_func("parent", "__construct"), and if class A's constructor is defined as the class name rather than "__construct", then PHP seems to crash (which results in Apache 2 crashing). Problem still exists with all extensions disabled.

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

class testClass
{
	function testClass ()
	{
		echo 'Output string!';
	}
}


class testClass2 extends testClass
{
	function __construct ()
	{
		call_user_func(array('parent', '__construct'));
	}
}

new testClass2;

?>

Expected result:
----------------
The above code should echo out the string 'Output string!'. This code works correctly when "call_user_func" or "call_user_func_array" are not used.

Actual result:
--------------
call_user_func() and call_user_func_array(), cause PHP and as a result, Apache 2 to crash. When running PHP DBG debugger, the crash happens on the execution of call_user_func() line. The Windows event log notes that httpd.exe (apache) had crashed, blaming php5ts.dll for the fault.