Error in ComposerScripts::prePackageUninstall due to incompatible psr/log in Composer

[mi-dave]

Laravel Version

12.38.1

PHP Version

8.3.27

Database Driver & Version

N/A

Description

This was previously reported in #57295 (converted to discussion #57299), but it couldn't be reproduced at the time.

After digging into it, I found it happens when anything tries to access the log driver or indirectly loads Psr\Log\AbstractLogger - e.g. in a service provider's boot() method. As noted in that discussion, it happens because Composer includes an older version of psr/log which is loaded first.

In my particular case, there were several things doing that:

• LdapRecord-Laravel indirectly calls Log::channel() from the boot() method.
• My own service provider calls Mail::alwaysTo($email); in development, which indirectly loads AbstractLogger.
• My own service provider calls Debugbar::enable(); in development, which does the same thing.

Since Composer isn't likely to upgrade psr/log any time soon, Laravel can't downgrade it, and it seems unreasonable to expect that no package ever calls those methods in boot(), I would suggest doing the event dispatch in a subprocess rather than bootstrapping Laravel inside the Composer process.

Steps To Reproduce

composer create-project --prefer-dist laravel/laravel laravel-test
cd laravel-test

Edit app/Providers/AppServiceProvider.php - add any one of these lines to the boot() method:

\Log::debug('test');
\Log::driver();
\Mail::alwaysTo('example@example.com');
class_exists(\Psr\Log\AbstractLogger::class);

Then run:

composer require laravel/helpers
composer remove laravel/helpers

The output includes:

Package operations: 0 installs, 0 updates, 1 removal
> Illuminate\Foundation\ComposerScripts::prePackageUninstall
PHP Fatal error:  Declaration of Monolog\Logger::emergency(Stringable|string $message, array $context = []): void must be compatible with Psr\Log\LoggerInterface::emergency($message, array $context = []) in /local/temp/laravel-test/vendor/monolog/monolog/src/Monolog/Logger.php on line 683
PHP Fatal error:  Uncaught Error: Class "Monolog\Logger" not found in /local/temp/laravel-test/vendor/monolog/monolog/src/Monolog/Handler/AbstractHandler.php:60

Or:

Package operations: 0 installs, 0 updates, 1 removal
> Illuminate\Foundation\ComposerScripts::prePackageUninstall
PHP Fatal error:  Declaration of Psr\Log\AbstractLogger::emergency(Stringable|string $message, array $context = []): void must be compatible with Psr\Log\LoggerInterface::emergency($message, array $context = []) in /local/temp/laravel-test/vendor/psr/log/src/LoggerTrait.php on line 18
PHP Fatal error:  Declaration of Monolog\Logger::emergency(Stringable|string $message, array $context = []): void must be compatible with Psr\Log\LoggerInterface::emergency($message, array $context = []) in /local/temp/laravel-test/vendor/monolog/monolog/src/Monolog/Logger.php on line 683

[cosmastech]

Thank you for the reproduction case 🙏 I think it makes a lot of sense to run a separate process.