This release is not compatible with PHP 8.1.2

[bvowell1975]

Is there an existing issue for this?

• I have searched the existing issues

Which topic?

https://devdocs.magento.com/guides/v2.4/release-notes/open-source-2-4-4.html

What's wrong with the content?

output of "magento set:up"
PHP Fatal error: During inheritance of Countable: Uncaught Exception: Deprecated Functionality: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/mage-src/2.4.4/vendor/composer/composer/src/Composer/Repository/ArrayRepository.php on line 206 in /var/mage-src/2.4.4/vendor/magento/framework/App/ErrorHandler.php:61
Stack trace:
#0 /var/mage-src/2.4.4/vendor/composer/composer/src/Composer/Repository/ArrayRepository.php(27): Magento\Framework\App\ErrorHandler->handler()
#1 /var/mage-src/2.4.4/vendor/composer/ClassLoader.php(571): include('...')
#2 /var/mage-src/2.4.4/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile()
#3 /var/mage-src/2.4.4/vendor/composer/composer/src/Composer/Repository/WritableArrayRepository.php(22): Composer\Autoload\ClassLoader->loadClass()
#4 /var/mage-src/2.4.4/vendor/composer/ClassLoader.php(571): include('...')
#5 /var/mage-src/2.4.4/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile()
#6 /var/mage-src/2.4.4/vendor/composer/composer/src/Composer/Repository/FilesystemRepository.php(25): Composer\Autoload\ClassLoader->loadClass()
#7 /var/mage-src/2.4.4/vendor/composer/ClassLoader.php(571): include('...')
#8 /var/mage-src/2.4.4/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile()
#9 /var/mage-src/2.4.4/vendor/composer/composer/src/Composer/Repository/InstalledFilesystemRepository.php(20): Composer\Autoload\ClassLoader->loadClass()
#10 /var/mage-src/2.4.4/vendor/composer/ClassLoader.php(571): include('...')
#11 /var/mage-src/2.4.4/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile()
#12 /var/mage-src/2.4.4/vendor/composer/composer/src/Composer/Factory.php(429): Composer\Autoload\ClassLoader->loadClass()
#13 /var/mage-src/2.4.4/vendor/composer/composer/src/Composer/Factory.php(339): Composer\Factory->addLocalRepository()
#14 /var/mage-src/2.4.4/vendor/composer/composer/src/Composer/Factory.php(576): Composer\Factory->createComposer()
#15 /var/mage-src/2.4.4/vendor/magento/framework/Composer/ComposerFactory.php(47): Composer\Factory::create()
#16 /var/mage-src/2.4.4/vendor/magento/framework/Composer/ComposerInformation.php(368): Magento\Framework\Composer\ComposerFactory->create()
#17 /var/mage-src/2.4.4/vendor/magento/framework/Composer/ComposerInformation.php(381): Magento\Framework\Composer\ComposerInformation->getComposer()
#18 /var/mage-src/2.4.4/vendor/magento/framework/Composer/ComposerInformation.php(244): Magento\Framework\Composer\ComposerInformation->getLocker()
#19 /var/mage-src/2.4.4/vendor/magento/framework/App/ProductMetadata.php(120): Magento\Framework\Composer\ComposerInformation->getSystemPackages()
#20 /var/mage-src/2.4.4/vendor/magento/framework/App/ProductMetadata.php(80): Magento\Framework\App\ProductMetadata->getSystemPackageVersion()
#21 /var/mage-src/2.4.4/vendor/magento/framework/Console/Cli.php(98): Magento\Framework\App\ProductMetadata->getVersion()
#22 /var/mage-src/2.4.4/bin/magento(22): Magento\Framework\Console\Cli->__construct()
#23 {main} in /var/mage-src/2.4.4/vendor/composer/composer/src/Composer/Repository/ArrayRepository.php on line 27

What changes do you propose?

fix attribute

Anything else that can help to cover this?

no

[m2-assistant]

Hi @bvowell1975. Thank you for your report.
To speed up processing of this issue, make sure that you provided sufficient information.

Add a comment to assign the issue: @magento I am working on this

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[hostep]

@bvowell1975, try upgrading composer/composer to the latest version, credits to @BarnyShergold:

[hguthrie]

@bvowell1975 Does this solve your issue?

[bvowell1975]

No, same result. I am using Debian Sid, and the newest composer available from that Debian repo is v2.2.9. I manually downloaded composer v2.3.5 from the getcomposer.org website and tried everything again with PHP 8.1.2, and the exact same errors come up. I'm reverting back to PHP 7.4.26 right now and 'magento set:up' appears to be functional.

[bvowell1975]

I'm not sure if this is relevant or not, but PHP 8.1.2 was also throwing MySQL errors about a file not existing. I'm running and connecting to MySQL through a local unix socket, and TCP/IP connections are disabled completely in the MySQL config. Is there something different about how PHP 8.1 handles PDO connections and how Magento uses them when connecting over a socket? My env.php has a blank 'host' entry in the config, and with the 'unix_socket' parameter defined.

[hostep]

There is more info in this thread: magento/magento2#35306, hopefully you can find an answer there...

[C4rter]

The issue is the composer module in the vendor folder.
I don't know when but when following the steps in the linked thread, it will update at some point.

If not following the steps there is a point when it won't update anymore and you are stuck with the old module that's incompatible to PHP 8.1

[bvowell1975]

Can you share the old and new module versions? I've restored my 2.4.3-p1 backup several times and followed the steps in the other thread, and keep ending up with a 2.4.4 installation that works with PHP 7 but not with PHP 8. I had a couple of dependency problems in the composer.json that took a bit to sort out, but all the Magento components downloaded and upgraded without complaining.

At the end of my upgrade attempts, I'm left with composer/composer 2.2.12 and the following DB errors when trying "magento set:up":

Cache types config flushed successfully

SQLSTATE[HY000] [2002] No such file or directory

In Abstract.php line 144:

SQLSTATE[HY000] [2002] No such file or directory

In Abstract.php line 128:

SQLSTATE[HY000] [2002] No such file or directory

Immediately switching back to PHP 7 gives a functional system with none of those errors, which is why I was thinking this might be some sort of PDO driver problem between PHP7 and PHP8, or something strange with the env.php syntax that isn't picking up all the necessary details for the PDO driver. As I noted before, I'm running MySQL on a unix socket, and not over TCP/IP.

[dobooth]

Closing as this is not a docs issue.