#545 epic freezes

[david gang]

i work on epic 0.6.33 and it freezed. this means that i could not edit the document

In the log there was the following message
!ENTRY org.eclipse.ui 4 0 2009-04-05 17:52:03.053
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.core.runtime.AssertionFailedException: assertion failed:
at org.eclipse.core.runtime.Assert.isTrue(Assert.java:111)
at org.eclipse.core.runtime.Assert.isTrue(Assert.java:97)
at org.eclipse.ui.internal.texteditor.quickdiff.DocumentLineDiffer.handleAboutToBeChanged(DocumentLineDiffer.java:775)
at org.eclipse.ui.internal.texteditor.quickdiff.DocumentLineDiffer.documentAboutToBeChanged(DocumentLineDiffer.java:744)
at org.eclipse.jface.text.AbstractDocument.fireDocumentAboutToBeChanged(AbstractDocument.java:645)
at org.eclipse.jface.text.AbstractDocument.replace(AbstractDocument.java:1148)
at org.eclipse.core.internal.filebuffers.SynchronizableDocument.replace(SynchronizableDocument.java:151)
at org.eclipse.jface.text.AbstractDocument.replace(AbstractDocument.java:1176)
at org.eclipse.core.internal.filebuffers.SynchronizableDocument.replace(SynchronizableDocument.java:137)
at org.eclipse.jface.text.DefaultDocumentAdapter.replaceTextRange(DefaultDocumentAdapter.java:248)
at org.eclipse.swt.custom.StyledText.modifyContent(StyledText.java:5876)
at org.eclipse.swt.custom.StyledText.sendKeyEvent(StyledText.java:6631)
at org.eclipse.swt.custom.StyledText.doContent(StyledText.java:2186)
at org.eclipse.swt.custom.StyledText.handleKey(StyledText.java:5145)
at org.eclipse.swt.custom.StyledText.handleKeyDown(StyledText.java:5170)
at org.eclipse.swt.custom.StyledText$7.handleEvent(StyledText.java:4873)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1158)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1182)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1167)
at org.eclipse.swt.widgets.Widget.sendIMKeyEvent(Widget.java:1244)
at org.eclipse.swt.widgets.Control.gtk_commit(Control.java:2599)
at org.eclipse.swt.widgets.Canvas.gtk_commit(Canvas.java:163)
at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1533)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4506)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4099)
at org.eclipse.swt.internal.gtk.OS._gtk_im_context_filter_keypress(Native Method)
at org.eclipse.swt.internal.gtk.OS.gtk_im_context_filter_keypress(OS.java:5324)
at org.eclipse.swt.widgets.Control.filterKey(Control.java:2038)
at org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:2758)
at org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:702)
at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1543)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4506)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4099)
at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method)
at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:5792)
at org.eclipse.swt.widgets.Display.eventProc(Display.java:1177)
at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)
at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:1550)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3031)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
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:386)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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)

after the restart i had the following message

java.lang.IllegalArgumentException: Argument not valid
at org.eclipse.swt.SWT.error(SWT.java:3761)
at org.eclipse.swt.SWT.error(SWT.java:3695)
at org.eclipse.swt.SWT.error(SWT.java:3666)
at org.eclipse.swt.custom.StyledText.setStyleRanges(StyledText.java:7914)
at org.eclipse.swt.custom.StyledText.setStyleRanges(StyledText.java:8008)
at org.eclipse.jface.text.TextViewer.applyTextPresentation(TextViewer.java:4467)
at org.eclipse.jface.text.TextViewer.changeTextPresentation(TextViewer.java:4519)
at org.eclipse.jface.text.presentation.PresentationReconciler.applyTextRegionCollection(PresentationReconciler.java:579)
at org.eclipse.jface.text.presentation.PresentationReconciler.processDamage(PresentationReconciler.java:568)
at org.eclipse.jface.text.presentation.PresentationReconciler.access$3(PresentationReconciler.java:564)
at org.eclipse.jface.text.presentation.PresentationReconciler$InternalListener.inputDocumentChanged(PresentationReconciler.java:119)
at org.eclipse.jface.text.TextViewer.fireInputDocumentChanged(TextViewer.java:2714)
at org.eclipse.jface.text.TextViewer.setDocument(TextViewer.java:2763)
at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:541)
at org.eclipse.jface.text.source.projection.ProjectionViewer.setDocument(ProjectionViewer.java:369)
at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:496)
at org.eclipse.ui.texteditor.AbstractTextEditor.initializeSourceViewer(AbstractTextEditor.java:3808)
at org.eclipse.ui.texteditor.AbstractTextEditor.createPartControl(AbstractTextEditor.java:3364)
at org.eclipse.ui.texteditor.StatusTextEditor.createPartControl(StatusTextEditor.java:53)
at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.createPartControl(AbstractDecoratedTextEditor.java:394)
at org.epic.perleditor.editors.PerlEditor.createPartControl(PerlEditor.java:84)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:661)
at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:428)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:594)
at org.eclipse.ui.internal.EditorAreaHelper.setVisibleEditor(EditorAreaHelper.java:263)
at org.eclipse.ui.internal.EditorManager.setVisibleEditor(EditorManager.java:1410)
at org.eclipse.ui.internal.EditorManager$5.runWithException(EditorManager.java:944)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:133)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3378)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3036)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
at org.eclipse.ui.internal.Workbench$27.runWithException(Workbench.java:1363)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:133)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3378)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3036)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2295)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
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:386)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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)

what should i do ?