Description:
------------
While var_dump() produces sensible output for Closures, output of the var_export() is pretty much useless.

Test script:
---------------
<?php

$a = range(1, 3);
$foo = function($n) use($a) {
	return $a[$n];
};

var_dump($foo);
var_export($foo);


Expected result:
----------------
object(Closure)#1 (2) {
  ["static"]=>
  array(1) {
    ["a"]=>
    array(3) {
      [0]=>
      int(1)
      [1]=>
      int(2)
      [2]=>
      int(3)
    }
  }
  ["parameter"]=>
  array(1) {
    ["$n"]=>
    string(10) "<required>"
  }
}

(((resembling the following:)))
object(Closure)#1 (2) {
  ["static"]=>
  array(1) {
    ["a"]=>
    array(3) {
      [0]=>
      int(1)
      [1]=>
      int(2)
      [2]=>
      int(3)
    }
  }
  ["parameter"]=>
  array(1) {
    ["$n"]=>
    string(10) "<required>"
  }
}

Actual result:
--------------
object(Closure)#1 (2) {
  ["static"]=>
  array(1) {
    ["a"]=>
    array(3) {
      [0]=>
      int(1)
      [1]=>
      int(2)
      [2]=>
      int(3)
    }
  }
  ["parameter"]=>
  array(1) {
    ["$n"]=>
    string(10) "<required>"
  }
}
Closure::__set_state(array(
))