Description:
------------
Consider the following code:

$foo = new A;
$foo->bar = 'bar';
echo $foo->bar;

Assume A defines __get.
Behavior of the last line is different depending on whether A defines __set. If __set is not defined, then the last line won't call __get. If __set is defined, __get will be called.

Reproduce code:
---------------
<?php
  class A { public function __get($prop) { echo "getting\n"; } }
  $a = new A; $a->foo = 'foo'; echo $a->foo."\n";
?>

------

<?php
  class A { public function __get($prop) { echo "getting\n"; } public function __set($prop, $val) { echo "setting\n"; } }
  $a = new A; $a->foo = 'foo'; echo $a->foo."\n";
?>


Expected result:
----------------
The first run produces:

foo

The second run produces:

getting
setting


Actual result:
--------------
Either 'getting' should be printed in both runs, or it should be not printed in either run.