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From "Eric Milles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GROOVY-8815) Inconsistent class file - undefined type parameter for trait implementer
Date Mon, 05 Nov 2018 16:14:01 GMT

    [ https://issues.apache.org/jira/browse/GROOVY-8815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16675379#comment-16675379
] 

Eric Milles commented on GROOVY-8815:
-------------------------------------

Hmmm...I tried that test case with my solution and found no issue (within the IDE).

> Inconsistent class file - undefined type parameter for trait implementer
> ------------------------------------------------------------------------
>
>                 Key: GROOVY-8815
>                 URL: https://issues.apache.org/jira/browse/GROOVY-8815
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 2.4.15, 2.5.2
>            Reporter: Eric Milles
>            Priority: Major
>
> When compiling the following classes, the Service class ends up with an incomplete type
parameter in it. This causes errors for the IDE: "Inconsistent classfile encountered: The
undefined type parameter T is referenced from within Service"
> {code}
> import java.util.function.Consumer
> import groovy.transform.CompileStatic
> class Event<T> {
>   Event(String id, T payload) {
>   }
>   Event<T> setReplyTo(Object replyTo) {
>   }
> }
> @CompileStatic
> trait Events {
>   def <E extends Event<?>> Registration<Object, Consumer<E>>
on(Class key, Closure consumer) {
>   }
> }
> interface Registration<K, V> {
> }
> class Service implements Events {
> }
> {code}
> javap output for Events shows:
> {code:java}
>   public abstract <E extends Event<?>> Registration<java.lang.Object,java.util.function.Consumer<E>>
on(java.lang.Class, groovy.lang.Closure);
> {code}
> javap output for Service shows:
> {code:java}
>   public <E extends Event<T>> Registration<java.lang.Object, java.util.function.Consumer<E>>
on(java.lang.Class, groovy.lang.Closure);
>   public <E extends Event<?>> Registration<java.lang.Object, java.util.function.Consumer<E>>
Eventstrait$super$on(java.lang.Class, groovy.lang.Closure);
> {code}
> It is this "T" in the trait method that is not defined. I think it should be "?" instead
when looking at the original method's and the trait bridge method's type parameters.



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