Description:
------------
I set the error handler to point at a class/method and then change some of the class variables. Debugging lines and method confirm the class variable has occurred. When I then trigger an error by echo'ing an uninitialized variable the error handler resets or reinstantiates the class.

If $use_me is initialized in the constructor instead of being defined as a 'constant', it makes no difference as the value at the time of an error is NULL, whatever is defined in the core class code.

If the set_error_handler function is called from line 3, i.e. set_error_handler (array (&$err, 'handler_error')), it all works fine.

Reproduce code:
---------------
<?
$err = new ErrorHandler;

$err->use_me = true;
echo ("[1:{$err->use_me}]");
$err->test ();

echo $fred;

class ErrorHandler {
  var $use_me = 4;
  
  function ErrorHandler () { 
    set_error_handler (array (&$this, 'handle_error'));
  }  

  function test () {
    echo ("[2:{$this->use_me}]");
  }  

  function handle_error ($number, $message, $file, $line, $context) {
    echo ("[3:{$this->use_me}]");
    echo ("Error $number");
  }  
}
?>

Expected result:
----------------
[1:1][2:1][3:1]Error 8

Actual result:
--------------
[1:1][2:1][3:4]Error 8