Bug 48852 Found the followng exception in the log
I20031216 java.lang.IllegalArgumentException: at org.eclipse.core.internal.runtime.Assert.isLegal(Assert.java:56) at org.eclipse.core.internal.runtime.Assert.isLegal(Assert.java:41) at org.eclipse.core.runtime.Status.setMessage(Status.java:156) at org.eclipse.core.runtime.Status.<init>(Status.java:75) at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation (TextFileDocumentProvider.java:396) at org.eclipse.ui.editors.text.TextFileDocumentProvider.validateState (TextFileDocumentProvider.java:812) at org.eclipse.ui.texteditor.AbstractTextEditor.validateState (AbstractTextEditor.java:3035) at org.eclipse.ui.texteditor.AbstractTextEditor$16.run (AbstractTextEditor.java:3080) at org.eclipse.swt.custom.BusyIndicator.showWhile (BusyIndicator.java:84) at org.eclipse.ui.texteditor.AbstractTextEditor.validateEditorInputState (AbstractTextEditor.java:3075) at org.eclipse.ui.texteditor.AbstractTextEditor$ElementStateListener$Validator.ver ifyText(AbstractTextEditor.java:212) at org.eclipse.swt.widgets.TypedListener.handleEvent (TypedListener.java:193) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:847) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:871) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:856) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:664) at org.eclipse.swt.custom.StyledText.modifyContent (StyledText.java:5947) at org.eclipse.swt.custom.StyledText.sendKeyEvent(StyledText.java:6931) at org.eclipse.swt.custom.StyledText.doContent(StyledText.java:2554) at org.eclipse.swt.custom.StyledText.handleKey(StyledText.java:5300) at org.eclipse.swt.custom.StyledText.handleKeyDown (StyledText.java:5323) at org.eclipse.swt.custom.StyledText$8.handleEvent (StyledText.java:5070) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:847) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:871) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:856) at org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1716) at org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1712) at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:3036) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2939) at org.eclipse.swt.widgets.Display.windowProc(Display.java:2836) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1369) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1990) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1506) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1482) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench (Workbench.java:246) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:139) at org.eclipse.ui.internal.ide.IDEApplication.run (IDEApplication.java:47) at org.eclipse.core.internal.runtime.PlatformActivator$1.run (PlatformActivator.java:233) at org.eclipse.core.runtime.adaptor.EclipseStarter.run (EclipseStarter.java:84) 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:324) at org.eclipse.core.launcher.Main.basicRun(Main.java:280) at org.eclipse.core.launcher.Main.run(Main.java:741) at org.eclipse.core.launcher.Main.main(Main.java:582)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitDocumentProvider.java
/*
			 * @see Annotation#paint
			 */
			public void paint(GC gc, Canvas canvas, Rectangle r) {
				initializeImages();
				if (fImage != null)
					drawImage(fImage, gc, canvas, r, SWT.CENTER, SWT.TOP);
			}
			
			/*
			 * @see IJavaAnnotation#getImage(Display)
			 */
			public Image getImage(Display display) {
				initializeImages();
				return fImage;
			}
			
			/*
			 * @see IJavaAnnotation#getMessage()
			 */
			public String getText() {
				return fProblem.getMessage();
			}
			
			/*
			 * @see IJavaAnnotation#getArguments()
			 */
			public String[] getArguments() {
				return isProblem() ? fProblem.getArguments() : null;
			}