I randomly upgraded from an old version to latest and I noticed I broke the website because I was naming variables data

Something like

Flight::render('serviceTable.php', [ 'data' => $data], 'content');

and it broke here
https://github.com/flightphp/core/blob/aaf9f62ecc6f2cb4b75c75d6d72351e8e19b611d/flight/template/View.php#L125

but I hadn't time to investigate as it was in production ( 🥇 ) so I simply renamed all the things to exData and it worked.
Perhaps a check or a note in the migration docs could be useful...