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No steps, sorry. Noticed it in the Error Log an hour later. -- Error Details -- Date: Wed Aug 03 11:10:31 CEST 2011 Message: Exception occurred in listener of Type hierarchy change notification Severity: Error Product: Eclipse SDK 3.7.0.v201107291200 (org.eclipse.sdk.ide) Plugin: org.eclipse.jdt.core Session Data: eclipse.buildId=I20110729-1200 java.fullversion=JRE 1.6.0 IBM J9 2.4 Windows XP x86-32 jvmwi3260sr7-20091214_49398 (JIT enabled, AOT enabled) J9VM - 20091214_049398 JIT - r9_20091123_13891 GC - 20091111_AA BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=pl_PL Framework arguments: -product org.eclipse.sdk.ide Command-line arguments: -product org.eclipse.sdk.ide -data D:\workspace\eclipse\web -dev file:D:/workspace/eclipse/team/dev.eclipse.org_HEAD_extssh/.metadata/.plugins/org.eclipse.pde.core/Eclipse (web)/dev.properties -os win32 -ws win32 -arch x86 Exception Stack Trace: java.lang.NullPointerException at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache$HierarchyCacheEntry.dispose(SuperTypeHierarchyCache.java:57) at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache.removeHierarchyEntryFromCache(SuperTypeHierarchyCache.java:211) at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache.access$0(SuperTypeHierarchyCache.java:208) at org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache$HierarchyCacheEntry.typeHierarchyChanged(SuperTypeHierarchyCache.java:41) at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy$1.run(TypeHierarchy.java:365) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.fireChange(TypeHierarchy.java:360) at org.eclipse.jdt.internal.core.DeltaProcessor$5.run(DeltaProcessor.java:1697) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.jdt.internal.core.DeltaProcessor.notifyTypeHierarchies(DeltaProcessor.java:1688) at org.eclipse.jdt.internal.core.DeltaProcessor.resourceChanged(DeltaProcessor.java:2081) at org.eclipse.jdt.internal.core.DeltaProcessingState.resourceChanged(DeltaProcessingState.java:470) at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285) at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149) at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:395) at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1530) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2353) at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:118) at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:75) at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:65) at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation(TextFileDocumentProvider.java:456) at org.eclipse.ui.editors.text.TextFileDocumentProvider.saveDocument(TextFileDocumentProvider.java:772) at org.eclipse.ui.texteditor.AbstractTextEditor.performSave(AbstractTextEditor.java:5048) at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.performSave(CompilationUnitEditor.java:1247) at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor.doSave(CompilationUnitEditor.java:1301) at org.eclipse.ui.texteditor.AbstractTextEditor$TextEditorSavable.doSave(AbstractTextEditor.java:7177) at org.eclipse.ui.Saveable.doSave(Saveable.java:214) at org.eclipse.ui.internal.SaveableHelper.doSaveModel(SaveableHelper.java:349) at org.eclipse.ui.internal.SaveableHelper$3.run(SaveableHelper.java:195) at org.eclipse.ui.internal.SaveableHelper$5.run(SaveableHelper.java:277) at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372) at org.eclipse.jface.window.ApplicationWindow$1.run(ApplicationWindow.java:759) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.jface.window.ApplicationWindow.run(ApplicationWindow.java:756) at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2642) at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:285) at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:264) at org.eclipse.ui.internal.SaveableHelper.saveModels(SaveableHelper.java:207) at org.eclipse.ui.internal.SaveableHelper.savePart(SaveableHelper.java:144) at org.eclipse.ui.internal.EditorManager.savePart(EditorManager.java:1399) at org.eclipse.ui.internal.WorkbenchPage.savePart(WorkbenchPage.java:3416) at org.eclipse.ui.internal.WorkbenchPage.saveEditor(WorkbenchPage.java:3429) at org.eclipse.ui.internal.handlers.SaveHandler.execute(SaveHandler.java:54) at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508) at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:468) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:786) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:885) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:567) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:508) at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:123) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1052) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1098) at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1509) at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4640) at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:345) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4528) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4972) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2531) 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(NativeMethodAccessorImpl.java:48) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:600) 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) at org.eclipse.equinox.launcher.Main.main(Main.java:1386)
Moving to JDT/UI for investigation
Raksha, please investigate.
Fixed in org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache. Couldn't reproduce the scenario where the type hierarchy is null when the cache entry is removed, even tried some odd scenarios. So just added check to avoid NPE.
(In reply to comment #3) > Fixed in org.eclipse.jdt.internal.corext.util.SuperTypeHierarchyCache. Couldn't > reproduce the scenario where the type hierarchy is null when the cache entry is > removed, even tried some odd scenarios. So just added check to avoid NPE. ==> commit 4778eb29eb182b5bc283c46e59c6eafac8b2afe1
