java.lang.IllegalArgumentException: Not a default method
   at com.sun.tools.jdi.ObjectReferenceImpl.validateIfaceMethodInvocation(ObjectReferenceImpl.java:352)
   at com.sun.tools.jdi.ObjectReferenceImpl.validateMethodInvocation(ObjectReferenceImpl.java:292)
   at com.sun.tools.jdi.ObjectReferenceImpl.invokeMethod(ObjectReferenceImpl.java:405)
   at org.netbeans.modules.debugger.jpda.jdi.ObjectReferenceWrapper.invokeMethod(ObjectReferenceWrapper.java:510)
   at org.netbeans.modules.debugger.jpda.visual.JavaComponentInfo$ComponentProperty.getValueLazy(JavaComponentInfo.java:609)
   at org.netbeans.modules.debugger.jpda.visual.JavaComponentInfo$ComponentProperty.access$500(JavaComponentInfo.java:526)
   at org.netbeans.modules.debugger.jpda.visual.JavaComponentInfo$ComponentProperty$1$1.run(JavaComponentInfo.java:586)
   at org.netbeans.modules.debugger.jpda.visual.RemoteServices$1.breakpointReached(RemoteServices.java:378)
   at org.netbeans.api.debugger.jpda.JPDABreakpoint.fireJPDABreakpointChange(JPDABreakpoint.java:300)
   at org.netbeans.api.debugger.jpda.JPDADebugger.fireBreakpointEvent(JPDADebugger.java:491)
   at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.fireBreakpointEvent(JPDADebuggerImpl.java:659)
   at org.netbeans.modules.debugger.jpda.breakpoints.BreakpointImpl.perform(BreakpointImpl.java:559)
   at org.netbeans.modules.debugger.jpda.breakpoints.MethodBreakpointImpl.exec(MethodBreakpointImpl.java:258)
   at org.netbeans.modules.debugger.jpda.util.Operator.processEvents(Operator.java:502)
   at org.netbeans.modules.debugger.jpda.util.Operator.access$800(Operator.java:116)
   at org.netbeans.modules.debugger.jpda.util.Operator$1.run(Operator.java:247)
   at java.lang.Thread.run(Thread.java:745)