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Win7, Build id: I20100718-2237 I was trying the steps in bug 317466 to see where we are at on that bug. So I had done something like: 1. Open a file. 2. Drag the 'Problems' view to the 'Outline' view's stack. 3. Detach the 'Problems' view. 4. Detach the 'Outline' view to the 'Problems' view's stack. 5. Minimize that stack. 6. Restore it. The current behavior is different than what the bug says, so I decided to reset the (Java) perspective and try some simpler steps in order to annotate that bug. After resetting the perspective, I tried to detach the outline view (I think) and got an NPE. At that point, nothing seemed to work (show view, etc.) and I got an NPE when closing the workbench. Note that things seemed better when I opened the workbench again (I don't think I was permanently hosed by the problem). I'm not sure these are the precise steps but it was something close to this. I'll attach the log.
Created attachment 174671 [details] log
after playing around with some different drag/drop scenarios, detach, etc... I'm pretty sure that resetting the perspective is what starts to cause the trouble. I was resetting from the perspective switcher.
From HEAD (with the fix for bug 320306.) I can still get into problems after resetting a perspective. Again, my steps are sketchy, because I had reset the java perspective while in the middle of a bunch of drag and drop experiments. I can confirm that I had only one perspective open (Java). I had run into some trouble with empty detached windows and decided to reset the perspective. When I tried to exit the workbench, I got this error: !ENTRY org.eclipse.ui.workbench 4 2 2010-07-20 14:16:26.612 !MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench". !STACK 0 org.eclipse.e4.core.di.InjectionException: org.eclipse.swt.SWTException: Widget is disposed at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:54) at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:795) at org.eclipse.e4.core.internal.di.InjectorImpl.uninject(InjectorImpl.java:163) at org.eclipse.e4.core.internal.di.InjectorImpl.disposed(InjectorImpl.java:326) at org.eclipse.e4.core.internal.di.Requestor.disposed(Requestor.java:112) at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:59) at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:90) at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.doHandleInvalid(TrackableComputationExt.java:53) at org.eclipse.e4.core.internal.contexts.Computation.handleInvalid(Computation.java:59) at org.eclipse.e4.core.internal.contexts.EclipseContext.dispose(EclipseContext.java:196) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.clearContext(PartRenderingEngine.java:604) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:545) at org.eclipse.ui.internal.WorkbenchWindow.hardClose(WorkbenchWindow.java:1431) at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:1132) at org.eclipse.ui.internal.WorkbenchWindow.access$9(WorkbenchWindow.java:1111) at org.eclipse.ui.internal.WorkbenchWindow$6.run(WorkbenchWindow.java:1158) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1156) at org.eclipse.ui.internal.Workbench$13.run(Workbench.java:1023) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.Workbench.busyClose(Workbench.java:1017) at org.eclipse.ui.internal.Workbench.access$11(Workbench.java:951) at org.eclipse.ui.internal.Workbench$14.run(Workbench.java:1093) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.Workbench.close(Workbench.java:1091) at org.eclipse.ui.internal.Workbench.close(Workbench.java:1064) at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:1129) at org.eclipse.ui.internal.WorkbenchWindow.access$9(WorkbenchWindow.java:1111) at org.eclipse.ui.internal.WorkbenchWindow$6.run(WorkbenchWindow.java:1158) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1156) at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1172) at org.eclipse.ui.internal.WorkbenchWindow$4.close(WorkbenchWindow.java:427) at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer$8.shellClosed(WBWRenderer.java:420) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:98) 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.Decorations.closeWidget(Decorations.java:308) at org.eclipse.swt.widgets.Decorations.WM_CLOSE(Decorations.java:1665) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4162) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1598) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2038) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4873) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2454) at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:497) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4251) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1598) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2038) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4873) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2454) at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:497) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4251) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1598) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2038) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4873) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2459) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3655) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:713) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:633) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:106) at org.eclipse.ui.internal.Workbench$3.run(Workbench.java:541) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:525) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115) 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:369) 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:619) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574) at org.eclipse.equinox.launcher.Main.run(Main.java:1407) at org.eclipse.equinox.launcher.Main.main(Main.java:1383) Caused by: org.eclipse.swt.SWTException: Widget is disposed at org.eclipse.swt.SWT.error(SWT.java:4083) at org.eclipse.swt.SWT.error(SWT.java:3998) at org.eclipse.swt.SWT.error(SWT.java:3969) at org.eclipse.swt.widgets.Widget.error(Widget.java:468) at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:340) at org.eclipse.swt.widgets.Control.getShell(Control.java:1432) at org.eclipse.e4.ui.workbench.addons.minmax.TrimStack.getShellClientComposite(TrimStack.java:385) at org.eclipse.e4.ui.workbench.addons.minmax.TrimStack.showStack(TrimStack.java:366) at org.eclipse.e4.ui.workbench.addons.minmax.TrimStack.cleanUp(TrimStack.java:218) 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.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:47) ... 86 more
*** This bug has been marked as a duplicate of bug 319847 ***
