#41 Assertion Failed in M8

[Anonymous]

I have just started using the JSP editor and am
encounter problems using the editor. After I get this
error the editor continues to give Assertion Failed -
Unhandled loop event errors and the ediotr also types
backwards. when typing the words move to the right not
the cursor.

!ENTRY org.eclipse.ui 4 4 May 05, 2004 20:03:30.565
!MESSAGE Unhandled event loop exception
!ENTRY org.eclipse.ui 4 0 May 05, 2004 20:03:30.581
!MESSAGE Assertion failed:
!STACK 0
org.eclipse.jface.text.Assert$AssertionFailedException:
Assertion failed:
at org.eclipse.jface.text.Assert.isTrue(Assert.java:175)
at org.eclipse.jface.text.Assert.isTrue(Assert.java:160)
at
org.eclipse.jface.text.Position.<init>(Position.java:55)
at
org.eclipse.jface.text.rules.DefaultPartitioner.computePartitioning(DefaultPartitioner.java:486)
at
org.eclipse.jface.text.AbstractDocument.computePartitioning(AbstractDocument.java:1188)
at
org.eclipse.jface.text.AbstractDocument.computePartitioning(AbstractDocument.java:837)
at
net.sf.solareclipse.text.rules.DocumentViewPartitioner.addOuterPartitions(DocumentViewPartitioner.java:676)
at
net.sf.solareclipse.text.rules.DocumentViewPartitioner.computePartitioning(DocumentViewPartitioner.java:631)
at
org.eclipse.jface.text.AbstractDocument.computePartitioning(AbstractDocument.java:1188)
at
org.eclipse.jface.text.TextUtilities.computePartitioning(TextUtilities.java:411)
at
org.eclipse.jface.text.presentation.PresentationReconciler.createPresentation(PresentationReconciler.java:437)
at
org.eclipse.jface.text.presentation.PresentationReconciler.processDamage(PresentationReconciler.java:550)
at
org.eclipse.jface.text.presentation.PresentationReconciler.access$5(PresentationReconciler.java:548)
at
org.eclipse.jface.text.presentation.PresentationReconciler$InternalListener.textChanged(PresentationReconciler.java:218)
at
org.eclipse.jface.text.TextViewer.updateTextListeners(TextViewer.java:2233)
at
org.eclipse.jface.text.TextViewer$DocumentListener.documentChanged(TextViewer.java:291)
at
org.eclipse.jface.text.AbstractDocument.doFireDocumentChanged2(AbstractDocument.java:673)
at
org.eclipse.jface.text.AbstractDocument.doFireDocumentChanged(AbstractDocument.java:638)
at
org.eclipse.jface.text.AbstractDocument.doFireDocumentChanged(AbstractDocument.java:623)
at
org.eclipse.jface.text.AbstractDocument.fireDocumentChanged(AbstractDocument.java:698)
at
org.eclipse.jface.text.AbstractDocument.replace(AbstractDocument.java:989)
at
org.eclipse.jface.text.DocumentAdapter.replaceTextRange(DocumentAdapter.java:194)
at
org.eclipse.swt.custom.StyledText.modifyContent(StyledText.java:5549)
at
org.eclipse.swt.custom.StyledText.sendKeyEvent(StyledText.java:6391)
at
org.eclipse.swt.custom.StyledText.doContent(StyledText.java:2526)
at
org.eclipse.swt.custom.StyledText.handleKey(StyledText.java:4948)
at
org.eclipse.swt.custom.StyledText.handleKeyDown(StyledText.java:4971)
at
org.eclipse.swt.custom.StyledText$7.handleEvent(StyledText.java:4720)
at
org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at
org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:769)
at
org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:793)
at
org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:778)
at
org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1720)
at
org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1716)
at
org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:3041)
at
org.eclipse.swt.widgets.Control.windowProc(Control.java:2944)
at
org.eclipse.swt.widgets.Display.windowProc(Display.java:3146)
at
org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native
Method)
at
org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:1374)
at
org.eclipse.swt.internal.BidiUtil.windowProc(BidiUtil.java:647)
at
org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native
Method)
at
org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1450)
at
org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2254)
at
org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1562)
at
org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1536)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:257)
at
org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:139)
at
org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:90)
at
org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:277)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:239)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:117)
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.core.launcher.Main.basicRun(Main.java:267)
at org.eclipse.core.launcher.Main.run(Main.java:692)
at org.eclipse.core.launcher.Main.main(Main.java:676)