Description:
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I have a class called INIT that stores object of classes in array. When I add a line $this->db = &$db; PHP reports an error. 

This happens ONLY when I add this line. Then suddenly everywhere, where I called INIT class, PHP gives me this error.

Reproduce code:
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$db = Instance::get('MySQLConnector');

$db->connectDB($config[db][host], $config[db][user], $config[db][password],  $config[db][database]);
		
$this->db = &$db; // THIS IS THIS LINE

// creating object of this class

$core = Instance::get('Core');

// Intializing Router Class

$router = Instance::get('Router');

$_param = $router->parseURL();


Expected result:
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It is suppose to assign DB object to class' varable $db ($this->db = &$db).

Actual result:
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Warning: Problem with method call - please report this bug in C:\usr\www\ff\class\Core.class.php on line 39

Warning: Problem with method call - please report this bug in C:\usr\www\ff\class\Core.class.php on line 43