[Contracts] Fix setting $container before calling parent::setContainer in ServiceSubscriberTrait #49441
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This changes the
setContainer
method ofServiceSubscriberTrait
so that it callsparent::setContainer
first, before updating$this->container
. This is so that the parent method can work correctly if it relies on the old container value.This is particularly relevant for
AbstractController
, since it returns the old container value. When used withServiceSubscriberTrait
, it returned the new container rather than the old one. This, in turn, caused incorrect behavior in framework bundle'sControllerResolver
, as described in #49382.