Bug 67187 [implementation] Concurrent modification of CompilationUnitDocumentProvider's ReverseMap
Was just scrolling through a Java file and got a popup with the following info: Java AST creation (Error: An internal error occurred during: "Java AST creation".) An internal error occurred during: "Java AST creation". java.lang.IndexOutOfBoundsException: Index: 62, Size: 60 java.util.ArrayList.RangeCheck(ArrayList.java:507) java.util.ArrayList.get(ArrayList.java:324) org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitDocumentProvider$ReverseM ap.get(CompilationUnitDocumentProvider.java:325) org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitDocumentProvider$Compilat ionUnitAnnotationModel.addAnnotation(CompilationUnitDocumentProvider.java:665) org.eclipse.jface.text.source.AnnotationModel.addAnnotation (AnnotationModel.java:163) org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater.calcula teLightBulb(QuickAssistLightBulbUpdater.java:233) org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater.doSelec tionChanged(QuickAssistLightBulbUpdater.java:221) org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater.access$ 0(QuickAssistLightBulbUpdater.java:204) org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater$1.selec tionChanged(QuickAssistLightBulbUpdater.java:128) org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$PartLis tenerGroup.calculateASTandInform(SelectionListenerWithASTManager.java:164) org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$3.run (SelectionListenerWithASTManager.java:136) org.eclipse.core.internal.jobs.Worker.run(Worker.java:66) Wasn't doing anything remarkable at the time - certainly nothing that I would expect would induce this...
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/QuickAssistLightBulbUpdater.java
public void uninstall() {
		uninstallSelectionListener();
		if (fPropertyChangeListener != null) {
			PreferenceConstants.getPreferenceStore().removePropertyChangeListener(fPropertyChangeListener);		
			fPropertyChangeListener= null;
		}
	}
	
	protected void doPropertyChanged(String property) {
		if (property.equals(PreferenceConstants.EDITOR_QUICKASSIST_LIGHTBULB)) {
			if (isSetInPreferences()) {
				ICompilationUnit cu= getCompilationUnit();
				if (cu != null) {
					installSelectionListener();
					Point point= fViewer.getSelectedRange();
					ASTParser parser= ASTParser.newParser(AST.JLS2);
					parser.setSource(cu);
					parser.setResolveBindings(true);
					CompilationUnit astRoot= (CompilationUnit) parser.createAST(null);
					doSelectionChanged(point.x, point.y, astRoot);
				}
			} else {
				uninstallSelectionListener();
			}			
		}
	}	
	
	private ICompilationUnit getCompilationUnit() {
		IEditorInput input= fEditor.getEditorInput();
		Object elem= input.getAdapter(IJavaElement.class);