TYPO3 Core

Yesterday I tried upgrading a TYPO3 install which excluded E_USER_DEPRECATED in [SYS][exceptionalErrors].
This lead to an uncaught exception in frontend, backend and install tool and I had to change the setting manually in my configuration.

If this happens for people during an upgrade it would be cool if the install tool would at least still work.

The exception is thrown in: Utility/ExtensionManagementUtility.php:1714

        if (!empty($messages)) {
            $context = 'Automatic TCA migration done during bootstrap. Please adapt TCA accordingly, these migrations'
                . ' will be removed. The backend module "Configuration -> TCA" shows the modified values.'
                . ' Please adapt these areas:';
            array_unshift($messages, $context);
            trigger_error(implode(LF, $messages), E_USER_DEPRECATED);
        }

Just tried it again (value 28674) and typo3/ and typo3/install do not work, accessing the install tool via typo3/install.php does work.