[jira] [Comment Edited] (GROOVY-11975) CLONE - Groovy 5 can not compile super.foo with default interface method

["Eric Milles (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GROOVY-11975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18077343#comment-18077343 ] 

Eric Milles edited comment on GROOVY-11975 at 4/30/26 1:47 PM:
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So if I write this in Java, I get an error that Object does not have a foo method.
!image-2026-04-30-08-44-41-897.png!

I need to add a qualifier to the super call to target the interface method.  I think this has to do with future-proofing – a super class adding a foo method would change the outcome otherwise.

The STC error is directing you to add the qualifier, which would be "IService.super.save(entity)" in your example.


was (Author: emilles):
So if I write this in Java, I get an error that Object does not have a foo method.
!image-2026-04-30-08-44-41-897.png!

I need to add a qualifier to the super call to target the interface method.  I think this has to do with future-proofing – a super class adding a foo method would change the outcome.

The STC error is directing you to add the qualifier, which would be "IService.super.save(entity)" in your example.

> CLONE - Groovy 5 can not compile super.foo with default interface method
> ------------------------------------------------------------------------
>
>                 Key: GROOVY-11975
>                 URL: https://issues.apache.org/jira/browse/GROOVY-11975
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 5.x
>            Reporter: Saravanan
>            Assignee: Eric Milles
>            Priority: Minor
>         Attachments: image-2026-04-30-08-44-41-897.png
>
>
> {code:java}
> package com.company.test
> import groovy.transform.CompileStatic
> @CompileStatic
> interface IService {
>     default void save(T entity) {
>         System.out.println(entity);
>     }
> }
> @CompileStatic
> class TestGenericGroovy implements IService {
>     void save(String entity) {
>         // IService.super.save(entity) // works
>         super.save(entity) // doesn't work: Groovyc: [Static type checking] - Default method save() requires qualified super
>     }
>     static void main(String[] args) {
>         new TestGenericGroovy().save("test")
>     }
> }
>  {code}
> This seems to stem from issue GROOVY-10494.
> Now that Groovy supports interfaces natively without traits, it looks like this other fix is not necessary



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