Hello Klemen Ferjancic

I am not really sure what should be the output of --describe-module since our JARs are not modules. They are plain old JARs meaning they should be used/recognized as automatic modules.

Apart from that, org.jboss.weld.environment.WeldProvider truly isn't part of servlet-core (automatic) module. It is instead located in weld-environment-common JAR which the servlet JAR depends on. So perhaps you should have both JARs on module path when considering the availability of the provider?

My JDK 9 knowledge isn't vast enough to tell from the top of my head, I can try and dig deeper into this later on.