TYPO3 Core

When I try to create a new version of a page, I end up in PHP fatal error.

Tested with current master rev. 932f1dd

• Disable workspace extension, enable versioning extension
• Go to list module
• Create page
• Create a second version of the page

Result:

[Fri Apr 19 11:17:38 2013] [error] [client 127.0.0.1] PHP Fatal error:  Call to undefined method TYPO3\\CMS\\Extbase\\Utility\\ExtensionUtility::isLoaded() in /var/www/sites/foo.bar/typo3_src-master/typo3/sysext/version/Classes/Controller/VersionModuleController.php on line 504, referer: http://foo.bar/typo3/mod.php?M=web_list&id=1
[Fri Apr 19 11:17:38 2013] [error] [client 127.0.0.1] PHP Stack trace:, referer: http://foo.bar/typo3/mod.php?M=web_list&id=1
[Fri Apr 19 11:17:38 2013] [error] [client 127.0.0.1] PHP   1. {main}() /var/www/sites/foo.bar/typo3_src-master/typo3/sysext/version/cm1/index.php:0, referer: http://foo.bar/typo3/mod.php?M=web_list&id=1
[Fri Apr 19 11:17:38 2013] [error] [client 127.0.0.1] PHP   2. TYPO3\\CMS\\Version\\Controller\\VersionModuleController->main() /var/www/sites/foo.bar/typo3_src-master/typo3/sysext/version/cm1/index.php:41, referer: http://foo.bar/typo3/mod.php?M=web_list&id=1
[Fri Apr 19 11:17:38 2013] [error] [client 127.0.0.1] PHP   3. TYPO3\\CMS\\Version\\Controller\\VersionModuleController->versioningMgm() /var/www/sites/foo.bar/typo3_src-master/typo3/sysext/version/Classes/Controller/VersionModuleController.php:226, referer: http://foo.bar/typo3/mod.php?M=web_list&id=1
[Fri Apr 19 11:17:38 2013] [error] [client 127.0.0.1] PHP   4. TYPO3\\CMS\\Version\\Controller\\VersionModuleController->adminLinks() /var/www/sites/foo.bar/typo3_src-master/typo3/sysext/version/Classes/Controller/VersionModuleController.php:370, referer: http://foo.bar/typo3/mod.php?M=web_list&id=1