Description:
------------
<?php
class  myclass{
	public $x;
	public function __construct($string){
		$this->x=$string;
	}
	public function show(){
		echo "this message is {$this->x}";
	}
}
$func = function (){
	$this->show();
};
$class = new myclass('hi this is example for bug');
$x = Closure::bind($func,$class);
$x();

Test script:
---------------
<?php
class  myclass{
	public $x;
	public function __construct($string){
		$this->x=$string;
	}
	public function show(){
		echo "this message is {$this->x}";
	}
}
$func = function (){
	$this->show();
};
$class = new myclass('hi this is example for bug');
$x = Closure::bind($func,$class);
$x();

Expected result:
----------------
this message is hi this is example for bug

Actual result:
--------------
Warning: Cannot bind an instance to a static closure in phar://var/www/test.phar/web.php on line 15