Mattias Reichel created GROOVY-11736:
----------------------------------------

             Summary: Compile error in Groovy 5
                 Key: GROOVY-11736
                 URL: https://issues.apache.org/jira/browse/GROOVY-11736
             Project: Groovy
          Issue Type: Bug
    Affects Versions: 5.0.0-rc-1
            Reporter: Mattias Reichel


This class hierarchy compiles successfully with Groovy 4.0.28.
(It is used in the Grails codebase)
{code:java}
class A implements Collection {

    @Delegate final Collection target

    A(Collection target) {
        this.target = target
    }
}

class B extends A implements Set {

    @Delegate Set target

    B(Set target) {
        super(target)
        this.target = target
    }
}{code}
{code:java}
10: The interface Collection cannot be implemented more than once with 
different arguments: java.util.Collection<java.lang.Object> and 
java.util.Collection
. At [10:1]  @ line 10, column 1.
   class B extends A implements Set {
   ^1 error{code}



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