Integer overflow in PHP 8.1.19 for macOS

[danepowell]

On several unrelated projects using setup-php in GitHub Actions, upgrading from PHP 8.1.18 to 8.1.19 in macOS runners caused an integer overflow when running phpstan:

PHP Fatal error: Possible integer overflow in memory allocation (2147483648 * 32 + 32) in phar:///Users/runner/work/composer-stager/composer-stager/vendor/phpstan/phpstan/phpstan.phar/vendor/nette/di/src/DI/DependencyChecker.php on line 47

For instance, on the acquia-php-sdk-v2 project, here's the last good build from two weeks ago, and the first failing build after that. Pretty much the only change is the bump from PHP 8.1.18 to PHP 8.1.19.

Here's another failing build on the composer-stager project.

Running the same script locally on macOS 13.3.1 works fine, as does the same script in Ubuntu, or in PHP 8.0 or 8.2.

Obviously this could be a bug in PHP core or the phpstan libraries, but the extreme specificity of it leads me to believe that it could be a problem with this particular PHP build in GitHub Actions. I know setup-php uses its own homebrew PHP builds, is it possible the PHP 8.1.19 macOS build was corrupted somehow?

[shivammathur]

@danepowell I have rebuilt php 8.1, please try restarting the CI job.

[danepowell]

Incredibly that worked!

typhonius/acquia-php-sdk-v2#393

I'm going to have my colleagues verify on their projects as well.

I'm quite curious about what might have been wrong with the build.

[shivammathur]

PHP 8.1 was retagged in php-src mostly likely for this bug.
Ref: php/web-php-distributions@a5e260c