HEAD, make install, install-pear.php, iterotor fatal errors

Hello, Using current HEAD, I got the following errors in make install-pear: ... Installing PHP CLI binary: /usr/local/web/php5/bin/ Installing PHP CLI man page: /usr/local/web/php5/man/man1/ Installing PEAR environment: /usr/local/web/php5/lib/php/ PHP Fatal error: Can't inherit abstract function Iterator::current() (previously declared abstract in Iterator) in Unknown on line 0 PHP Fatal error: Can't inherit abstract function Iterator::next() (previously declared abstract in Iterator) in Unknown on line 0 PHP Fatal error: Can't inherit abstract function Iterator::key() (previously declared abstract in Iterator) in Unknown on line 0 PHP Fatal error: Can't inherit abstract function Iterator::hasMore() (previously declared abstract in Iterator) in Unknown on line 0 PHP Fatal error: Can't inherit abstract function Iterator::rewind() (previously declared abstract in Iterator) in Unknown on line 0 ... Before I go for a deeper investigation, I'm wondering what has been changed. We do not use iterator in this script (or is there a default usage somewhere?) pierre