Bug #79349 [Com]: Unlinked anonymous classes prevent using preloading

Edit report at https://bugs.php.net/bug.php?id=79349&edit=1 ID: 79349 Comment by: nicolasgrekas@php.net Reported by: nicolasgrekas@php.net Summary: Unlinked anonymous classes prevent using preloading Status: Open Type: Bug Package: opcache PHP Version: 7.4.3 Block user comment: N Private report: N New Comment: Maybe all missing symbols could trigger the autoloader before linking happens? Previous Comments: ------------------------------------------------------------------------ [2020-03-05 11:15:30] nicolasgrekas@php.net Of course, using regular class autoloading would work also instead of the current error. ------------------------------------------------------------------------ [2020-03-05 11:09:16] nicolasgrekas@php.net The first affect class is this one: https://github.com/symfony/symfony/blob/7c90c8ba84f24e3d4b62c02eeb8b14ce23eff59f/src/Symfony/Component/HttpKernel/Kernel.php#L459 > $cache = new class($cachePath, $this->debug) extends ConfigCache { Right now, this anonymous class cannot be linked during preloading because the ConfigCache is not available. Then, at runtime, when the code path is hit, the error occurs. I wish there would be a way to discover programmatically that the ConfigCache class is required so that it could be loaded. Apparently, there is one internally, since opcache is able to trigger this warning: > Can't preload unlinked class class@anonymous: Unknown parent > Symfony\Component\Config\ConfigCache But that's too late for me to do anything about it. Of course, I could explicitly list ConfigCache for preloading - but this doesn't work in the generic case as it requires ad-hoc knowledge of the codebase. ------------------------------------------------------------------------ [2020-03-05 11:03:19] nikic@php.net Can you please share the relevant code in Symfony? ------------------------------------------------------------------------ [2020-03-05 11:02:09] nicolasgrekas@php.net Typo: Would it be possible to have nested anonymous classes be loaded at *preload* time? ------------------------------------------------------------------------ [2020-03-05 11:00:58] nicolasgrekas@php.net Description: ------------ Following https://bugs.php.net/78937, commit 20ef51db22c46fd45976eb6d0b780c14022c8873 added a new runtime exception that says: > Fatal error: Class foo wasn't preloaded I don't how to deal with this exception. I feel like this is a blocker that prevents using preloading when the preloading strategy is base on composer+autoloading. This hits Symfony. Would it be possible to have nested anonymous classes be loaded at runtime? This would allow the autoloader to load their dependencies, thus solving the issue. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79349&edit=1