Description:
------------
The "getFileName" method of ReflectionClass returns an empty string when it should return a valid path.  The correct value is returned the first time it is run, however, every call afterward returns an empty string.


PHP 5.4.9 NTS
Apache 2.2.22 fcgid 2.3.7

[PHP Modules]
bcmath
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[Zend Modules]
Xdebug

Test script:
---------------
<?php 
//Run this twice with wincache loaded
//Run twice without wincache loaded
class Foo{
	
	public function dump(){
		$r    = new ReflectionClass($this);
		$path = $r->getFileName();
		
		var_dump($path);
	}
	
}

$test = new Foo();
$test->dump();

Expected result:
----------------
A var_dump of a string containing the path to the current file.