On Mon, 14 Oct 2024 at 01:28, Jordan LeDoux <jordan.led...@gmail.com>: > Backwards compatible has never, in any work I've done through my entire > career, meant something like "if you take old code and then update it to the > new version incorrectly, it doesn't work"... that seems... obvious? > > What exactly is the claim being made here? Because it sounds like the claim > is very much that second "definition". > > Jordan
Hi, Jordan! The problem is that in practice most of the PHP libraries consider themselves to be compatible with newer PHP versions. For instance, Symfony PropertyInfo uses `"php": ">=8.2"` constraint in its `composer.json`. However, it is not compatible with PHP 8.4, I've just created an issue: https://github.com/symfony/symfony/issues/58556 The end user will be the victim, because `composer require symfony/property-info` will happily install property-info v7.1.4 for PHP 8.4, but it's not gonna work. -- Valentin
