Description:
------------
ArrayObject doesn't call offsetSet when using combined operators on a property with \ArrayObject::ARRAY_AS_PROPS flag.

https://bugs.php.net/bug.php?id=45653&edit=2 says it should work.





Test script:
---------------
<?php
class MyArrayObject extends ArrayObject {
    public function offsetSet($name, $value) {
        parent::offsetSet($name . '_control', $value);
        parent::offsetSet($name, $value);
    }
}

$test = new MyArrayObject();
$test->setFlags(\ArrayObject::ARRAY_AS_PROPS);

$test['my_value_1']  = 1;
$test['my_value_1']  = $test['my_value_1'] + 1;
$test['my_value_1'] += 1;

$test->my_value_2  = 1;
$test->my_value_2  = $test->my_value_2 + 1;
$test->my_value_2 += 1; // It seems that MyArrayObject::offsetSet() is not called here

echo '<pre>';
print_r($test);


Expected result:
----------------
MyArrayObject Object
(
    [storage:ArrayObject:private] => Array
    (
        [my_value_1_control] => 3
        [my_value_1] => 3
        [my_value_2_control] => 3
        [my_value_2] => 3
    )
)

Actual result:
--------------
MyArrayObject Object
(
    [storage:ArrayObject:private] => Array
    (
        [my_value_1_control] => 3
        [my_value_1] => 3
        [my_value_2_control] => 2
        [my_value_2] => 3
    )
)