Description:
------------
When having the following code:

<?php
class foo {
    function bar() {
        self::$bar = 42;
    }
}
?>

The compiler generates compiled variable !0 for $bar, even though it's a class variable:

derick@whisky:/tmp$ php -dvld.active=1 -r 'class foo { function bar() { self::$bar = 42; } }'
Finding entry points
Branch analysis from position: 0
Return found
filename:       Command line code
function name:  (null)
number of ops:  2
compiled vars:  none
line     # *  op                           fetch          ext  return  operands
---------------------------------------------------------------------------------
   1     0  >   NOP                                                      
         1    > RETURN                                                   null

branch: #  0; line:     1-    1; sop:     0; eop:     1
path #1: 0, 
Class foo:
Function bar:
Finding entry points
Branch analysis from position: 0
Return found
filename:       Command line code
function name:  bar
number of ops:  4
compiled vars:  !0 = $bar
line     # *  op                           fetch          ext  return  operands
---------------------------------------------------------------------------------
         0  >   ZEND_FETCH_CLASS                              1          
         1      FETCH_W                      static member       $1      'bar'
         2      ASSIGN                                                   $1, 42
         3    > RETURN                                                   null

branch: #  0; line:     1-    1; sop:     0; eop:     3
path #1: 0, 
End of function bar.

End of class foo.
14:41 <@Derick> dmitry: I am wondering why self::$foo creates a compiled variable. Any idea?
14:42 <@Derick> dmitry: it creates it, but it's never used
14:44 <@dmitry> I see. It's probably because od simple one-pass compiler that first interpret $foo as local variable and only then as a class variable :)
14:44 <@Derick> dmitry: any way we can fix that perhaps?
14:44 <@dmitry> Derick: could you please create a bug and assign it to me
14:44 <@Derick> yes, sure