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Build ID: I20080409-1425 Steps To Reproduce: Unsure how to reproduce. I was editing some Java source, selected some lines and maybe alt-tabbed away from Eclipse or hit the up arrow or something when the error dialog popped up. The following showed up in my error log: org.eclipse.core.runtime.AssertionFailedException: assertion failed: at org.eclipse.core.runtime.Assert.isTrue(Assert.java:109) at org.eclipse.core.runtime.Assert.isTrue(Assert.java:95) at org.eclipse.jdt.internal.ui.actions.IndentAction.selectAndReveal(IndentAction.java:220) at org.eclipse.jdt.internal.ui.actions.IndentAction.access$5(IndentAction.java:218) at org.eclipse.jdt.internal.ui.actions.IndentAction$1.run(IndentAction.java:189) at org.eclipse.jdt.internal.ui.actions.IndentAction.run(IndentAction.java:207) at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:185) at org.eclipse.ui.internal.handlers.LegacyHandlerWrapper.execute(LegacyHandlerWrapper.java:109) 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:471) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:822) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:880) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:569) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:511) at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:126) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:83) at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1160) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1001) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1026) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1011) at org.eclipse.swt.widgets.Control.traverse(Control.java:3493) at org.eclipse.swt.widgets.Control.translateTraversal(Control.java:3475) at org.eclipse.swt.widgets.Composite.translateTraversal(Composite.java:1092) at org.eclipse.swt.widgets.Display.translateTraversal(Display.java:4303) at org.eclipse.swt.widgets.Display.filterMessage(Display.java:1174) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3368) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2375) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2339) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2205) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:478) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:473) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193) 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:362) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:175) 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:549) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504) at org.eclipse.equinox.launcher.Main.run(Main.java:1236) More information:
I can't do much without steps. Please reopen if you can provide steps.