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https://issues.apache.org/jira/browse/GROOVY-11548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17910588#comment-17910588
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Xiaotian Ma commented on GROOVY-11548:
--------------------------------------

[~paulk] Maybe I have to reopen this issue because I tried both of your 
workaround but no one works. When I use @Delegate, the "new B().func()" still 
prints "I0::func". Writting the interface "I0" in java still not makes the "B" 
to compile (the same error).

> Could not inherit class and interface where class has a final method 
> overridden by interface
> --------------------------------------------------------------------------------------------
>
>                 Key: GROOVY-11548
>                 URL: https://issues.apache.org/jira/browse/GROOVY-11548
>             Project: Groovy
>          Issue Type: Bug
>          Components: Compiler
>    Affects Versions: 4.0.24
>         Environment: Tried on Linux and Windows, the same error.
>            Reporter: Xiaotian Ma
>            Assignee: Paul King
>            Priority: Major
>             Fix For: 5.0.0-alpha-11
>
>
> Compile following code.
> {code:groovy}
> class A {
>     final public void func() {
>     }
> }
> interface I0 {
>     public default void func() {
>     }
> }
> class B extends A implements I0 {
> }{code}
> Groovy 4.0.24:
> {code:java}
> A.groovy: -1: You are not allowed to override the final method func() from 
> class 'A'.
> @ line -1, column -1.
> 1 error{code}
> Groovy 5.0.0-alpha-11: passed



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