java.lang.NullPointerException
   at org.netbeans.modules.debugger.jpda.jdi.ClassTypeWrapper.concreteMethodByName(ClassTypeWrapper.java:168)
   at org.netbeans.modules.debugger.jpda.truffle.DebugManagerHandler.breakpointReached(DebugManagerHandler.java:153)
   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:652)
   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:503)
   at org.netbeans.modules.debugger.jpda.util.Operator.access$800(Operator.java:117)
   at org.netbeans.modules.debugger.jpda.util.Operator$1.run(Operator.java:248)
   at java.lang.Thread.run(Thread.java:745)