TYPO3 Core

using comments or ve_guestbook or other extensions which try to clear the cache with tce_main results in an error in the front end, as the be_user object doesn't exist.

extending the line 6774 in that file with the following if should solve the problem:

if(is_a($this->BE_USER,'t3lib_userAuth')) {
$this->BE_USER->writelog(3, 1, 0, 0, ...
}

Perhaps it was early enough for 4.5.1 - hope so
regards
Kay

(issue imported from #M17683)