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1. Drag a view that is in a stack with only one child. 2. Make the DND operation be one that'll split the stack into two separate stacks. 3. Release the mouse. 4. An SWTException is thrown. At this point if you try to reset your perspective all the stacks will go blank. Switching to another perspective and back seems to fix the problem but the system is probably still in a bad state. org.eclipse.swt.SWTException: Widget is disposed at org.eclipse.swt.SWT.error(SWT.java:4210) at org.eclipse.swt.SWT.error(SWT.java:4125) at org.eclipse.swt.SWT.error(SWT.java:4096) 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.Composite.computeSize(Composite.java:226) at org.eclipse.e4.ui.widgets.CTabFolder.setButtonBounds(CTabFolder.java:2219) at org.eclipse.e4.ui.widgets.CTabFolder.updateItems(CTabFolder.java:3449) at org.eclipse.e4.ui.widgets.CTabFolder.updateItems(CTabFolder.java:3382) at org.eclipse.e4.ui.widgets.CTabFolder.onResize(CTabFolder.java:1783) at org.eclipse.e4.ui.widgets.CTabFolder$2.handleEvent(CTabFolder.java:272) 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:5181) at org.eclipse.swt.widgets.Scrollable.WM_SIZE(Scrollable.java:291) at org.eclipse.swt.widgets.Composite.WM_SIZE(Composite.java:1662) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4586) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4939) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2519) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.WM_WINDOWPOSCHANGED(Control.java:5416) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4598) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4952) at org.eclipse.swt.internal.win32.OS.EndDeferWindowPos(Native Method) at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:949) at org.eclipse.swt.widgets.Composite.resizeChildren(Composite.java:915) at org.eclipse.swt.widgets.Composite.setResizeChildren(Composite.java:1126) at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1264) at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1270) at org.eclipse.swt.widgets.Composite.updateLayout(Composite.java:1249) at org.eclipse.swt.widgets.Composite.setLayoutDeferred(Composite.java:1086) at org.eclipse.swt.widgets.Display.runDeferredLayouts(Display.java:4156) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3714) at org.eclipse.e4.ui.workbench.addons.dndaddon.DnDManager.update(DnDManager.java:243) at org.eclipse.e4.ui.workbench.addons.dndaddon.SplitDropAgent.dock(SplitDropAgent.java:213) at org.eclipse.e4.ui.workbench.addons.dndaddon.SplitDropAgent.drop(SplitDropAgent.java:109) at org.eclipse.e4.ui.workbench.addons.dndaddon.DnDManager.finishDrag(DnDManager.java:257) at org.eclipse.e4.ui.workbench.addons.dndaddon.DnDManager.startDrag(DnDManager.java:233) at org.eclipse.e4.ui.workbench.addons.dndaddon.DnDManager$3.handleEvent(DnDManager.java:110) 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.Display.runDeferredEvents(Display.java:4132) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3721)
No longer reproducible on I20110331-2200.
