Symfony version(s) affected

7.3.1

Description

As discussed in #61169 and #61170

When PHP is upgraded above 8.3.x, every attempt to use cache:clear and certain custom Command objects results in CLI deprecation messages. These messages are emitted by var-exporter and Doctrine depending on the configuration. The only situation where they do not appear is with APP_ENV=dev

Various configuration changes and attempts to downgrade Doctrine were not successful. There might be workarounds involving Doctrine < 3.0 or doctrine @dev however those did not seem appropriate for my project.

How to reproduce

1. Install Symfony 7.3.0+ with PHP 8.4 and doctrine/orm 3.4 or 3.5.
2. Set APP_ENV=prod
3. Attempt bin/console cache:clear

Possible Solution

Downgrade to PHP 8.2 or 8.3.