ReflectionException: Class Symfony\Component\Templating\Helper\Helper not found

[gharlan]

Q	A
Bug report?	yes
Feature request?	no
BC Break report?	no
RFC?	no
Symfony version	3.3.6

I'm using symfony/flex with sf 3.3.
After upgrading to 3.3.6, I get this exception:

I do not use the templating component.

I guess it is related to #23573 (ping @nicolas-grekas)

[tarlepp]

Yep, I'm having same problem. Just updated to 3.3.6 and after that I get the same error...

[nicolas-grekas]

My bad. Should be fixed by #23755.
This should be triggered indirectly by calls to $container->getReflectionClass($class, false) (false as second arg is the important thing.)
I think that for now, you can opt-out from autowiring and autoconfiguration for the services that need the missing classes. Can you confirm (both the fix and that the config change works if possible?)

[Perf]

Having this problem.

Executing script assets:install --symlink --relative public [KO]
 [KO]
Script assets:install --symlink --relative %PUBLIC_DIR% returned with error code 255
!!
!!  Fatal error: Uncaught ReflectionException: Class Symfony\Component\Templating\Helper\Helper not found in /home/vagrant/Code/vendor/symfony/security-bundle/Templating/Helper/LogoutUrlHelper.php:23

composer.json

"require": {
        "php": "^7.1.3",
        "api-platform/api-pack": "^2.1@dev",
        "api-platform/core": "^2.1@dev",
        "doctrine/doctrine-migrations-bundle": "^1.2",
        "javiereguiluz/easyadmin-bundle": "^1.16",
        "symfony/console": "^3.3",
        "symfony/flex": "^1.0",
        "symfony/framework-bundle": "^3.3@dev",
        "symfony/yaml": "^3.3"
    },

symfony/framework-bundle (3.3.x-dev 25bc5e5)

So, issue seems not to be fixed yet. Or I'm doing something wrong.

[jvasseur]

@Perf the issue was in the dependency injection component not the framework bundle.

[chalasr]

In the config component in fact.

[Perf]

Thank you guys!
Btw, it was fixed by composer req config:^3.3@dev, got it from #23913