Comment 9 for bug 677066

I think it comes from the difference for the error_reporting variable. Your php.ini is set to not display E_NOTICE, so if you ran the tests on a version that didn't contain the call to error_reporting(E_ALL & ~E_DEPRECATED); in tests/php/hackit_all_tests.php, this would explain why you don't see any error.

I've attached my latest simpletest.log, with E_NOTICE reporting enabled.