Description:
------------
Attempting to read or write to a property of a (non-empty) non-object usually results in a notice or a warning.

However, no warning or notice is raised when performing an indexed or reference assignment. Consequently, the assignment fails silently. 

Confirmed on 5_2, 5_3 and HEAD snaps.

Reproduce code:
---------------
<?php
$s = "hello";
$a = true;

echo "--> read access: ";
echo $a->p;

echo "\n--> direct assignment: ";
$a->p = $s;

echo "\n--> increment: ";
$a->p++;

echo "\n--> reference assignment:";
$a->p =& $s;

echo "\n--> indexed assignment:";
$a->p[0] = $s;

echo "\n\n\n--> Confirm assignments have had no impact:";
var_dump($a, $a->p);
?>

Expected result:
----------------
--> read access: 
Notice: Trying to get property of non-object in %s on line 6

--> direct assignment: 
Warning: Attempt to assign property of non-object in %s on line 9

--> increment: 
Warning: Attempt to increment/decrement property of non-object in %s on line 12

--> reference assignment:
--> indexed assignment:


--> Confirm assignments have had no impact:
Notice: Trying to get property of non-object in %s on line 21
bool(true)
NULL
 

Actual result:
--------------
--> read access: 
Notice: Trying to get property of non-object in %s on line 6

--> direct assignment: 
Warning: Attempt to assign property of non-object in %s on line 9

--> increment: 
Warning: Attempt to increment/decrement property of non-object in %s on line 12

--> reference assignment:
Warning: Attempt to assign property of non-object in %s on line 15

--> indexed assignment:
Warning: Attempt to assign property of non-object in %s on line 18



--> Confirm assignments have had no impact:
Notice: Trying to get property of non-object in %s on line 21
bool(true)
NULL