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NPE during move (advice error) cause freeze What steps will reproduce the problem? 1. Create a BDD on model root 2. Move root Package in ModelExplorer -- Error Details -- Date: Wed Jun 01 23:18:49 CEST 2011 Message: java.lang.NullPointerException Severity: Error Product: Eclipse 1.4.0.20110526-1025 (org.eclipse.epp.package.modeling.product) Plugin: org.eclipse.ui.navigator Exception Stack Trace: java.lang.NullPointerException at org.eclipse.papyrus.sysml.diagram.blockdefinition.helper.advice.DeleteViewDuringMoveHelperAdvice.getViewsToDestroy(DeleteViewDuringMoveHelperAdvice.java:76) at org.eclipse.papyrus.sysml.diagram.blockdefinition.helper.advice.DeleteViewDuringMoveHelperAdvice.getBeforeMoveCommand(DeleteViewDuringMoveHelperAdvice.java:50) at org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelperAdvice.getBeforeEditCommand(AbstractEditHelperAdvice.java:91) at org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelper.getEditCommand(AbstractEditHelper.java:166) at org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelper.getEditCommand(AbstractEditHelper.java:137) at org.eclipse.gmf.runtime.emf.type.core.MetamodelType.getEditCommand(MetamodelType.java:107) at org.eclipse.papyrus.service.edit.internal.ElementEditService.getEditCommand(ElementEditService.java:84) at org.eclipse.papyrus.modelexplorer.dnd.CommonDropAdapterAssistant.getDropIntoCommand(CommonDropAdapterAssistant.java:90) at org.eclipse.papyrus.modelexplorer.dnd.CommonDropAdapterAssistant.getDropIntoCommand(CommonDropAdapterAssistant.java:342) at org.eclipse.papyrus.modelexplorer.dnd.CommonDropAdapterAssistant.getDrop(CommonDropAdapterAssistant.java:258) at org.eclipse.papyrus.modelexplorer.dnd.CommonDropAdapterAssistant.validateDrop(CommonDropAdapterAssistant.java:289) at org.eclipse.ui.navigator.CommonDropAdapter$2.run(CommonDropAdapter.java:247) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.navigator.CommonDropAdapter.validateDrop(CommonDropAdapter.java:244) at org.eclipse.jface.viewers.ViewerDropAdapter.doDropValidation(ViewerDropAdapter.java:210) at org.eclipse.jface.viewers.ViewerDropAdapter.dragOver(ViewerDropAdapter.java:260) at org.eclipse.swt.dnd.DNDListener.handleEvent(DNDListener.java:80) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774) at org.eclipse.swt.dnd.DropTarget.DragOver(DropTarget.java:366) at org.eclipse.swt.dnd.DropTarget$3.method4(DropTarget.java:250) at org.eclipse.swt.internal.ole.win32.COMObject.callback4(COMObject.java:101) at org.eclipse.swt.internal.ole.win32.COM.DoDragDrop(Native Method) at org.eclipse.swt.dnd.DragSource.drag(DragSource.java:363) at org.eclipse.swt.dnd.DragSource.access$0(DragSource.java:289) at org.eclipse.swt.dnd.DragSource$1.handleEvent(DragSource.java:172) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4163) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3752) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
Fixed in r4826: The NPE itself does not cause the eclipse freeze, it occurs while moving an element in the ModelExplorer in one of its children (only if the move is detected as a re-order action).
