Index: JavaSelectMarkerRulerAction.java
===================================================================
RCS file: /home/eclipse/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaSelectMarkerRulerAction.java,v
retrieving revision 1.1
diff -u -r1.1 JavaSelectMarkerRulerAction.java
--- JavaSelectMarkerRulerAction.java	1 Jun 2002 09:58:56 -0000	1.1
+++ JavaSelectMarkerRulerAction.java	17 Jun 2002 12:49:01 -0000
@@ -24,6 +24,7 @@
 
 import org.eclipse.ui.texteditor.AbstractMarkerAnnotationModel;
 import org.eclipse.ui.texteditor.ITextEditor;
+import org.eclipse.ui.texteditor.ITextEditorExtension;
 import org.eclipse.ui.texteditor.MarkerUtilities;
 import org.eclipse.ui.texteditor.SelectMarkerRulerAction;
 
@@ -66,6 +67,13 @@
 	}
 	
 	public void update() {
+		// Begin Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20114
+		if (fMyTextEditor instanceof ITextEditorExtension && ((ITextEditorExtension)fMyTextEditor).isEditorInputReadOnly()) {
+			fPosition= null;
+			super.update();
+			return;
+		}
+		// End Fix for http://dev.eclipse.org/bugs/show_bug.cgi?id=20114
 		fPosition= getProblemPosition();
 		if (fPosition != null)
 			setEnabled(true);