The following code produces "Repetitive method name/signature" error.

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public abstract class A { abstract protected void doIt() } class B extends A { void doIt() {} } new ProxyGenerator(debug:true).instantiateDelegateWithBaseClass([:], [], new B())

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After removing "protected" modifier it works properly. Full output: proxy source: ------------------ import org.codehaus.groovy.runtime.InvokerHelper class B_delegateProxy extends B { private delegate private closureMap B_delegateProxy(map, delegate) { this.closureMap = map this.delegate = delegate } void doIt() { Object[] args = [] InvokerHelper.invokeMethod(delegate, 'doIt', args) } void doIt() { Object[] args = [] InvokerHelper.invokeMethod(delegate, 'doIt', args) } } } new B_delegateProxy(map, delegate) ------------------ Exception thrown: groovy.lang.GroovyRuntimeException: Error creating proxy: startup failed, Script1.groovy: 9: Repetitive method name/signature for method 'void doIt()' in class 'B_delegateProxy'. @ line 9, column 5.Script1.groovy: 13: Repetitive method name/signature for method 'void doIt()' in class 'B_delegateProxy'. @ line 13, column 5. 2 errors