--TEST--
Basic class support - attempting to pass a class constant by reference.
--FILE--
<?php
  class aclass
  {
      const myConst = "hello";
  }
  
  function f(&$a)
  {
      $a = "changed";
  }
  
  f(aclass::myConst);
  var_dump(aclass::myConst);
?>
--EXPECTF--

Fatal error: Only variables can be passed by reference in %s on line 12