Description:
------------
The "class" parameter should be "B" instead of "A", as I called B::r() and not A::r().

Reproduce code:
---------------
<?php
abstract class A {
	public static function r() {
		var_dump(debug_backtrace());
	}
}

class B extends A {

}

echo B::r();
?>

Expected result:
----------------
array(1) {
  [0]=>
  array(6) {
    ["file"]=>
    string(13) "/www/test.php"
    ["line"]=>
    int(12)
    ["function"]=>
    string(1) "r"
    ["class"]=>
    string(1) "B" /* Not A */
    ["type"]=>
    string(2) "::"
    ["args"]=>
    array(0) {
    }
  }
}

Actual result:
--------------
array(1) {
  [0]=>
  array(6) {
    ["file"]=>
    string(13) "/www/test.php"
    ["line"]=>
    int(12)
    ["function"]=>
    string(1) "r"
    ["class"]=>
    string(1) "A"
    ["type"]=>
    string(2) "::"
    ["args"]=>
    array(0) {
    }
  }
}