Description:
------------
Code with a class and a subclass with constructor functions and a separate function in both classes causes both the Apache 2.0.63 PHP module and the cli that ships with PHP 5.2.6 to emit the SIGSEGV signal.


Reproduce code:
---------------
<?
class Article {
  var $ai;
  function Article() {
  }
  function print_xml($node, $data) {
        return "<" . $node . ">" . $data . "</" . $node . ">";
  }
}
class Contribution extends Article {
  function Contribution() {
    $this->Article();
  }
  function print_xml($node, $data) {
        $this->print_xml($node, $data);
  }
}
$contrib = new Contribution();
print $contrib->print_xml("tagname", "New");
?>

Expected result:
----------------
<tagname>New</tagname>


Actual result:
--------------
I put a partial backtrace from gdb 6.4.90-debian online at
http://www.ping.uio.no/~oka/php-5.2.6-oka-SIGSEGV/php-5.2.6-oka-SIGSEGV.gdb-session.log