This crashes:
function &foo() {
   while (list($key, $name) = each($arr));
   return($ret);
}

------

This works:
function &foo() {
   if (is_array($arr))
      while (list($key, $name) = each($arr));
   return($ret);
}

------

This works:
function &foo() {
   while (list($key, $name) = each($arr));
   return(is_array($ret) ? $ret : false);
}

I know returning a NULL value as refernce is nonsense but it shouldn't crash, right?