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Getting this in my inner right now. 1. Window > Show View > Other... > General > Navigator 2. Resize your left stack. 3. An NPE is thrown. 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.setVisible(Control.java:3370) at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer$3.controlResized(LazyStackRenderer.java:335) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228) 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:1058) at org.eclipse.swt.widgets.Control.WM_SIZE(Control.java:4813) at org.eclipse.swt.widgets.Scrollable.WM_SIZE(Scrollable.java:291) at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1653) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4234) 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.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.WM_WINDOWPOSCHANGED(Control.java:4970) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4244) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4873) at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method) at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1456) at org.eclipse.swt.widgets.Control.forceResize(Control.java:1018) at org.eclipse.swt.widgets.Control.getSize(Control.java:1451) at org.eclipse.e4.ui.workbench.renderers.swt.CTabRendering.computeTrim(CTabRendering.java:95) at org.eclipse.e4.ui.widgets.CTabFolder.onResize(CTabFolder.java:1764) at org.eclipse.e4.ui.widgets.CTabFolder$1.handleEvent(CTabFolder.java:265) 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:1058) at org.eclipse.swt.widgets.Control.WM_SIZE(Control.java:4813) at org.eclipse.swt.widgets.Scrollable.WM_SIZE(Scrollable.java:291) at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1653) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4234) 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.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.WM_WINDOWPOSCHANGED(Control.java:4970) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4244) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4873) at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method) at org.eclipse.swt.widgets.Widget.SetWindowPos(Widget.java:1456) at org.eclipse.swt.widgets.Control.setBounds(Control.java:2816) at org.eclipse.swt.widgets.Composite.setBounds(Composite.java:1018) at org.eclipse.swt.widgets.Control.setBounds(Control.java:2777) at org.eclipse.swt.widgets.Control.setBounds(Control.java:2773) at org.eclipse.swt.widgets.Control.setBounds(Control.java:2840) at org.eclipse.swt.custom.SashForm.onDragSash(SashForm.java:279) at org.eclipse.swt.custom.SashForm$1.handleEvent(SashForm.java:90) 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.sendSelectionEvent(Widget.java:1093) at org.eclipse.swt.widgets.Sash.WM_MOUSEMOVE(Sash.java:384) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4206) 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:718)
Can't reproduce this anymore with I20100716-0808. Probably an intermediate problem between all the rendering changes from yesterday.