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Using I20051018-0932, I got this error: org.eclipse.jface.text.Assert$AssertionFailedException: Assertion failed: at org.eclipse.jface.text.Assert.isTrue(Assert.java:189) at org.eclipse.jface.text.Assert.isTrue(Assert.java:174) at org.eclipse.jface.text.rules.FastPartitioner.documentChanged2(FastPartitioner.java:296) at org.eclipse.jface.text.AbstractDocument.updateDocumentStructures(AbstractDocument.java:652) at org.eclipse.jface.text.AbstractDocument.fireDocumentChanged(AbstractDocument.java:751) at org.eclipse.jface.text.AbstractDocument.replace(AbstractDocument.java:1112) at org.eclipse.jdt.internal.ui.javaeditor.PartiallySynchronizedDocument.replace(PartiallySynchronizedDocument.java:111) at org.eclipse.jface.text.AbstractDocument.replace(AbstractDocument.java:1119) at org.eclipse.jdt.internal.ui.javaeditor.PartiallySynchronizedDocument.replace(PartiallySynchronizedDocument.java:102) at org.eclipse.jface.text.DefaultDocumentAdapter.replaceTextRange(DefaultDocumentAdapter.java:238) at org.eclipse.swt.custom.StyledText.modifyContent(StyledText.java:5773) at org.eclipse.swt.custom.StyledText.sendKeyEvent(StyledText.java:6591) at org.eclipse.swt.custom.StyledText.doDelete(StyledText.java:2664) at org.eclipse.swt.custom.StyledText.invokeAction(StyledText.java:5657) at org.eclipse.jface.text.TextViewer.doOperation(TextViewer.java:3521) at org.eclipse.jface.text.source.SourceViewer.doOperation(SourceViewer.java:799) at org.eclipse.jface.text.source.projection.ProjectionViewer.doOperation(ProjectionViewer.java:1414) at org.eclipse.jdt.internal.ui.javaeditor.JavaSourceViewer.doOperation(JavaSourceViewer.java:177) at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$AdaptedSourceViewer.doOperation(CompilationUnitEditor.java:227) at org.eclipse.ui.texteditor.TextOperationAction$1.run(TextOperationAction.java:122) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69) at org.eclipse.ui.texteditor.TextOperationAction.run(TextOperationAction.java:120) at org.eclipse.jface.action.Action.runWithEvent(Action.java:996) at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:182) at org.eclipse.ui.internal.handlers.LegacyHandlerWrapper.execute(LegacyHandlerWrapper.java:108) at org.eclipse.core.commands.Command.execute(Command.java:311) at org.eclipse.core.commands.ParameterizedCommand.execute(ParameterizedCommand.java:401) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:459) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:781) at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:828) at org.eclipse.ui.internal.keys.OutOfOrderListener.handleEvent(OutOfOrderListener.java:76) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:893) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:917) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:902) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:930) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:926) at org.eclipse.swt.widgets.Widget.wmKeyDown(Widget.java:1525) at org.eclipse.swt.widgets.Control.WM_KEYDOWN(Control.java:3374) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3085) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3910) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1697) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2856) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1763) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1727) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:371) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:106) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:375) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:164) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.eclipse.core.launcher.Main.invokeFramework(Main.java:338) at org.eclipse.core.launcher.Main.basicRun(Main.java:282) at org.eclipse.core.launcher.Main.run(Main.java:977) at org.eclipse.core.launcher.Main.main(Main.java:952) I was deleting a line inside a string concatenation. I could not get it twice. I thought it was worth reporting it anyway.
Definitely worth reporting. The assertion is thrown when the partitioner is called with a different document than it is connected to, which should not be.
Which VM are you using?
I am using either a 1.4.2_10 or 1.5.0_06.
*** This bug has been marked as a duplicate of 134227 ***
