java.lang.AssertionError
   at org.netbeans.lib.profiler.results.locks.ThreadInfo.closeMonitor(ThreadInfo.java:77)
   at org.netbeans.lib.profiler.results.locks.LockGraphBuilder.monitorExit(LockGraphBuilder.java:160)
   at org.netbeans.lib.profiler.results.locks.AbstractLockDataFrameProcessor$2.execute(AbstractLockDataFrameProcessor.java:66)
   at org.netbeans.lib.profiler.results.AbstractDataFrameProcessor.foreachListener(AbstractDataFrameProcessor.java:177)
   at org.netbeans.lib.profiler.results.locks.AbstractLockDataFrameProcessor.fireMonitorExit(AbstractLockDataFrameProcessor.java:64)
   at org.netbeans.lib.profiler.results.cpu.CPUDataFrameProcessor.doProcessDataFrame(CPUDataFrameProcessor.java:251)
   at org.netbeans.lib.profiler.results.AbstractDataFrameProcessor.processDataFrame(AbstractDataFrameProcessor.java:97)
   at org.netbeans.lib.profiler.results.ProfilingResultsDispatcher$1.run(ProfilingResultsDispatcher.java:140)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
   at java.lang.Thread.run(Thread.java:745)