I'm not sure where I should read the output for the related jobs? Could anyone point me at past ones?

Symfony is still enabled on 7.4, the reason why I dropped it on master is that phpunit doesn't install due to platform requirements (it is not compatible with PHP 8 and there is no way to pass --ignore-platform-reqs). Unless this got fixed in the phpunit wrapper, this issue will appear again.

You can edit https://github.com/php/php-src/blob/master/azure-pipelines.yml and drop everything but the community job to check whether it works. It's not run on pull request builds.

it is not compatible with PHP 8 and there is no way to pass --ignore-platform-reqs

got it, the attached patch should work around the issue, don't you think?

What is the relation between flex and the memory_limit? We can also change the memory_limit.

It is possible to run php7.3 ./phpunit install? I'd guess that would avoid both the PHP version issue and be faster. I just didn't realize that the installation part could be run separately from the tests.

What is the relation between flex and the memory_limit?

When there are too many legacy tags, the matrix explodes, see symfony/flex#378 which introduced the workaround exactly for this reason.

I pushed symfony/symfony@62020ab on the bridge to give it the flexibility we need here.

Be careful if you want to do further tweaks, I push-forced on my branch.

Yay, looks like it works.

Also one ubsan warning (also on 7.4 but got lost in the log): ./home/vsts/work/1/s/ext/standard/random.c:238:13: runtime error: signed integer overflow: 9223372036854775807 - -9223372036854775808 cannot be represented in type 'long int'

Should probably configure it to abort instead of only printing a message.

Cool! What's the next step? There are failures, errors, deprecation notices (a bunch of them, dunno why as I don't have them on 7.3)

The next step should just be to merge it, we don’t really care about deprecations, notices etc on a userland level but the results of the ub tooling on the test suites :)

Partially backported via #4672 and then merged up. The symfony run was successful in https://dev.azure.com/phpazuredevops/PHP/_build/results?buildId=2567.