PHP 8.1 Return type of DeprecatedArray::unserialize() and ::serialize()

Running against 10.1

Not sure this can be backported to 9.5 as this change is 8.1 specific and D9 claims to support 7.4

Committed/pushed to 10.1.x and cherry-picked to 10.0.x, thanks!

We have a meta issue open trying to remove the all ReturnTypeWillChange annotations.

https://git.drupalcode.org/project/drupal/-/blob/9.5.x/core/lib/Drupal/C...

Drupal 9 with PHP 8.1 still has this problem.
Should I reopen this issue and change the "version" to "9.5.x-dev"?

Think you’ll have to patch for 9.5 as 9 claims to work with 7.4 and won’t that change break those sites?

For PHP 7.4 lines like this #[\ReturnTypeWillChange] are just a simple comment, it does nothing with it.
Same as this one

PHP 8.x handles this kind of comments in a special way.
https://www.php.net/manual/en/language.attributes.overview.php

Reopening for backport to 9.5.x, but I would like the CI run to be clean first (the last failures were a different issue, but let's be sure)

Good point, cherry-picked to 9.5.x too.

Automatically closed - issue fixed for 2 weeks with no activity.