Description:
------------
I was trying to call a function returned by another function and it caused a parse error.

Reproduce code:
---------------
function a() {
    echo 'a';
    return create_function('', 'echo \'b\';');
};
a()();

- OR -

function a() {
    echo 'a';
    return function() { echo 'b'; };
};
a()();

Expected result:
----------------
ab

Actual result:
--------------
Parse error: syntax error, unexpected '(' in ...