CI tests failing

[marcovtwout]

Latest commit on master was on december 15th, that test was succeeding (1c6f6fe)
When I rerun that test now, the build is failing: https://github.com/yiisoft/yii/actions/runs/3706226399/jobs/6371756468#step:15:56

Nothing changed in yii code, perhaps something in the build chain or one of the dependencies during testing?

PHPunit throws exceptions like:

1) CActiveRecordTest::testModel
Exception: Serialization of 'Closure' is not allowed

phpvfscomposer:///home/runner/work/yii/yii/vendor/phpunit/phpunit/phpunit:51
/home/runner/work/yii/yii/vendor/bin/phpunit:118

Possible cause is that phpunit hides a deeper error: sebastianbergmann/phpunit#2739

[marcovtwout]

Not sure why, but when I rerun now it works again: https://github.com/yiisoft/yii/actions/runs/3706226399
Closing.