sure, here it is (with stack trace):

Configuration read from /home/thomas/projeSpe/phpbb/phpunit.xml.dist

PHP Fatal error:  Call to a member function set() on a non-object in /home/thomas/projeSpe/phpbb/phpBB/includes/functions.php on line 127
PHP Stack trace:
PHP   1. {main}() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/phpunit:0
PHP   2. PHPUnit_TextUI_Command::main() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/phpunit:55
PHP   3. PHPUnit_TextUI_Command->run() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/src/TextUI/Command.php:132
PHP   4. PHPUnit_TextUI_TestRunner->doRun() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/src/TextUI/Command.php:179
PHP   5. PHPUnit_Framework_TestSuite->run() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/src/TextUI/TestRunner.php:426
PHP   6. PHPUnit_Framework_TestCase->run() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/src/Framework/TestSuite.php:675
PHP   7. PHPUnit_Framework_TestResult->run() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/src/Framework/TestCase.php:753
PHP   8. PHPUnit_Framework_TestCase->runBare() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/src/Framework/TestResult.php:686
PHP   9. PHPUnit_Framework_TestCase->runTest() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/src/Framework/TestCase.php:817
PHP  10. ReflectionMethod->invokeArgs() /home/thomas/projeSpe/phpbb/phpBB/vendor/phpunit/phpunit/src/Framework/TestCase.php:951
PHP  11. phpbb_console_command_cron_run_test->test_normal_use() /home/thomas/projeSpe/phpbb/tests/console/cron/run_test.php:0
PHP  12. Symfony\Component\Console\Tester\CommandTester->execute() /home/thomas/projeSpe/phpbb/tests/console/cron/run_test.php:59
PHP  13. Symfony\Component\Console\Command\Command->run() /home/thomas/projeSpe/phpbb/phpBB/vendor/symfony/console/Symfony/Component/Console/Tester/CommandTester.php:70
PHP  14. phpbb\console\command\cron\run->execute() /home/thomas/projeSpe/phpbb/phpBB/vendor/symfony/console/Symfony/Component/Console/Command/Command.php:244
PHP  15. phpbb\lock\db->acquire() /home/thomas/projeSpe/phpbb/phpBB/phpbb/console/command/cron/run.php:83
PHP  16. unique_id() /home/thomas/projeSpe/phpbb/phpBB/phpbb/lock/db.php:104
PHP  17. set_config() /home/thomas/projeSpe/phpbb/phpBB/includes/functions.php:203