Description:
------------
When returning an anonymous function from a method or function call, the returned closure is not directly executable in a logical fashion. The closure needs to be stored in order to be executed or must be called via the call_user_func family of functions.

This is fairly illogical and inconsistent with the idea of closures.

Reproduce code:
---------------
function test($a)
{
 return function($b) use($a) { echo $a . ':' . $b . '<br/>'; };
}

call_user_func(test(1), 2);
$x = test(1);
$x(2);
test(1)(2);

Expected result:
----------------
Output should be:
1:2
1:2
1:2


Actual result:
--------------
Execution fails. Error:

PHP Parse error:  syntax error, unexpected '('