bug #25976 [Config] Handle Service/EventSubscriberInterface in ReflectionClassResource (nicolas-grekas)

This PR was merged into the 3.4 branch.

Discussion
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[Config] Handle Service/EventSubscriberInterface in ReflectionClassResource

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #25906
| License       | MIT
| Doc PR        | -

@weaverryan that should fix an issue you reported.

Commits
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67e821b [Config] Handle Service/EventSubscriberInterface in ReflectionClassResource

Author: nicolas-grekas

Compiler/RegisterServiceSubscribersPass.php

@@ -56,14 +56,14 @@ protected function processValue($value, $isRoot = false)
         }
         $class = $value->getClass();
 
-        if (!is_subclass_of($class, ServiceSubscriberInterface::class)) {
-            if (!class_exists($class, false)) {
-                throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $this->currentId));
-            }
-
+        if (!$r = $this->container->getReflectionClass($class)) {
+            throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $this->currentId));
+        }
+        if (!$r->isSubclassOf(ServiceSubscriberInterface::class)) {
             throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $this->currentId, ServiceSubscriberInterface::class));
         }
-        $this->container->addObjectResource($class);
+        $class = $r->name;
+
         $subscriberMap = array();
         $declaringClass = (new \ReflectionMethod($class, 'getSubscribedServices'))->class;