sebastianbergmann/phpunit — pull request #747 by PHPGangsta (2012-12-12 15:13:57+00:00)
Title: Added function_exists('exec') in version detection

In some environments, exec() is disabled (disable_functions in php.ini), and then a warning is generated:

Warning: exec() has been disabled for security reasons in /data/phpunit/PHPUnit/Runner/Version.php on line 75