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https://issues.apache.org/jira/browse/GROOVY-11560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17916944#comment-17916944
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Eric Milles commented on GROOVY-11560:
--------------------------------------
The description here misses the override of m() in the concrete type, which is
what was missed from the first ticket.
> Invalid compiler error for class which overrides a method having duplicate
> default definitions from interfaces
> --------------------------------------------------------------------------------------------------------------
>
> Key: GROOVY-11560
> URL: https://issues.apache.org/jira/browse/GROOVY-11560
> Project: Groovy
> Issue Type: Bug
> Reporter: Eric Milles
> Assignee: Daniel Sun
> Priority: Major
> Labels: default-methods
>
> Consider the following:
> {code:java}
> package p;
> public interface A {
> default void m() {}
> }
> public interface B {
> default void m() {}
> }
> {code}
> {code:groovy}
> class C implements p.A, p.B {
> void test() {
> m()
> }
> }
> {code}
> {{groovyc}} does not detect that {{m()}} must be overridden to resolve the
> conflict. {{javac}} does produce an error, but it is still possible to
> import the interfaces from libraries and not trigger joint compilation.
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