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Occurred when Source Editor was closed / hidden in the Editing workspace and a Java source file was opened by double-clicking on it in the Explorer. Seems to be similar, but not identical, to the following: http://www.netbeans.org/issues/show_bug.cgi?id=27773 Stack trace in error dialog is as follows: java.lang.ClassCastException at org.openide.text.PositionRef.getPosition (PositionRef.java:134) at org.openide.text.DocumentLine.attachDetachAnnotations (DocumentLine.java:326) [catch] at org.openide.text.DocumentLine$LR.run (DocumentLine.java:609) at java.awt.event.InvocationEvent.dispatch (InvocationEvent.java:178) at java.awt.EventQueue.dispatchEvent (EventQueue.java:448) at java.awt.EventDispatchThread.pumpOneEventForHierarchy (EventDispatchThread.java:197) at java.awt.EventDispatchThread.pumpEventsForHierarchy (EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:144) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:136) at java.awt.EventDispatchThread.run (EventDispatchThread.java:99)
Created attachment 10638 [details] ide.log file
It seems this is duplicate of the issue #34246 *** This issue has been marked as a duplicate of 34246 ***