TYPO3 Core

This throws an error:

10 = TEXT
10 {
    noTrimWrap = | ({file:current:extension}, |)|
    insertData = 1
    data = file:current:size
    bytes = 1
    // regardless of using default or custom labels
    #bytes.labels = iec
    bytes.labels =  " B| KiB| MiB| GiB| TiB| PiB| EiB| ZiB| YiB" 
    // important for PHP 8, if base is not set, the Exception below is thown
    #bytes.base = 1024
}

(1/1) #1476107295 TYPO3\CMS\Core\Error\Exception

PHP Warning: Undefined array key "base" in __typo3_src/typo3_src-11.5/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php line 2085

//
ContentObjectRenderer.php line 2085

return GeneralUtility::formatSize((int)$content, $conf['bytes.']['labels'], $conf['bytes.']['base']);