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This bug was originally marked as duplicate of bug 148168, 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 20120311-209c662b6f6a) VM: Java HotSpot(TM) Server VM, 20.4-b02, Java(TM) SE Runtime Environment, 1.6.0_29-b11 OS: SunOS User Comments: stefpet: Triggered by simply moving the mouse in the edit window of .html file. stefpet: Scrolled edit window of .html file. vv159170: switch off auto refresh files GUEST: adding a new attribute to a bean Stacktrace: java.lang.AssertionError: visnodes.size()=13 snapshot.size()=0 at org.openide.explorer.view.VisualizerChildren.recomputeIndexes(VisualizerChildren.java:98) at org.openide.explorer.view.VisualizerChildren.removed(VisualizerChildren.java:284) at org.openide.explorer.view.VisualizerEvent$Removed.run(VisualizerEvent.java:135) at org.openide.util.Mutex.readAccess(Mutex.java:365) at org.openide.util.Mutex$1R.run(Mutex.java:1307) at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1920)
Created attachment 116558 [details] stacktrace
*** This bug has been marked as a duplicate of bug 208589 ***