java.lang.NullPointerException
   at org.netbeans.modules.debugger.jpda.models.CallStackFrameImpl.getLineNumber(CallStackFrameImpl.java:165)
   at org.netbeans.modules.debugger.jpda.models.JPDAThreadImpl.getLineNumber(JPDAThreadImpl.java:285)
   at org.netbeans.modules.debugger.jpda.ui.BreakpointOutput.substitute(BreakpointOutput.java:339)
   at org.netbeans.modules.debugger.jpda.ui.BreakpointOutput.substituteAndPrintText(BreakpointOutput.java:161)
   at org.netbeans.modules.debugger.jpda.ui.BreakpointOutput.breakpointReached(BreakpointOutput.java:154)
   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.LineBreakpointImpl.exec(LineBreakpointImpl.java:509)
   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)