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This bug was originally marked as duplicate of bug 216251, 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 201210180002) VM: Java HotSpot(TM) Client VM, 23.3-b01, Java(TM) SE Runtime Environment, 1.7.0_07-b11 OS: Windows 7 User Comments: javydreamercsw: Trying to refactor move a class via drag and drop. javydreamercsw: Dragging in a pom file. The Java FX browser is opened in another tab. sreimers: NPE while embedded Webkit is open in background tab Stacktrace: java.lang.NullPointerException at javafx.embed.swing.SwingDnD$2.dragDropEnd(SwingDnD.java:119) at java.awt.dnd.DragSource.processDragDropEnd(DragSource.java:769) at java.awt.dnd.DragSourceContext.dragDropEnd(DragSourceContext.java:437) at sun.awt.dnd.SunDragSourceContextPeer$EventDispatcher.run(SunDragSourceContextPeer.java:491) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:721)
Created attachment 126162 [details] stacktrace
*** This bug has been marked as a duplicate of bug 216251 ***