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This bug was originally marked as duplicate of bug 230276, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE Dev (Build nbms-and-javadoc-11212-on-20130627) VM: Java HotSpot(TM) 64-Bit Server VM, 25.0-b33, Java(TM) SE Runtime Environment, 1.8.0-ea-b91 OS: Linux User Comments: szmitek: NetBeans show message: Unexpected Exception on Last Run There was an error during the last run of NetBeans IDE. Can you please report the problem? I think that if error ocurred during the last run, NetBeans should reported this error during lst run. No error occured during NetBeans shutdown. szmitek: Switching between Netbeans and Firefox window tboudreau: Woo hoo szmitek: After update unexpected exception: A java.lang.NullPointerException exception has occurred. Stacktrace: org.netbeans.modules.deadlock.detector.Detector$DeadlockDetectedException at java.lang.Object.wait(Object.java:0) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1987)
Created attachment 136435 [details] stacktrace
*** This bug has been marked as a duplicate of bug 230276 ***