Bug 128825 [navigation] Long pause and exceptions pressing Ctrl+O
Build: 3.2 M5 While waiting for a long CVS checkout, I was browsing through some Java code. I hit Ctrl+O to open the outline, typed some characters ("get"), and then hit Ctrl+O again to show inherited members. There was a pause, and then the outline view went blank. After that, toggling Ctrl+O or changing the filter text in the outline had no effect - the view was just blank. After closing the outline popup completely and reopening, it was behaving as expected. While doing this, a large number of OperationCanceledExceptions appeared in my log file (log attached).
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaOutlineInformationControl.java
private static final String STORE_GO_INTO_TOP_LEVEL_TYPE_CHECKED= "GoIntoTopLevelTypeAction.isChecked"; 
		private TreeViewer fOutlineViewer;
		private ShowOnlyMainTypeAction(TreeViewer outlineViewer) {
			super(TextMessages.JavaOutlineInformationControl_GoIntoTopLevelType_label, IAction.AS_CHECK_BOX);
			setToolTipText(TextMessages.JavaOutlineInformationControl_GoIntoTopLevelType_tooltip);
			setDescription(TextMessages.JavaOutlineInformationControl_GoIntoTopLevelType_description);
			JavaPluginImages.setLocalImageDescriptors(this, "gointo_toplevel_type.gif"); 
			PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.GO_INTO_TOP_LEVEL_TYPE_ACTION);
			fOutlineViewer= outlineViewer;
			boolean showclass= getDialogSettings().getBoolean(STORE_GO_INTO_TOP_LEVEL_TYPE_CHECKED);
			setTopLevelTypeOnly(showclass);
		}
		/*
		 * @see org.eclipse.jface.action.Action#run()
		 */
		public void run() {
			setTopLevelTypeOnly(!fShowOnlyMainType);
		}
		private void setTopLevelTypeOnly(boolean show) {
			fShowOnlyMainType= show;
			setChecked(show);
			Tree tree= fOutlineViewer.getTree();
			tree.setRedraw(false);
			fOutlineViewer.refresh(false);
			if (!fShowOnlyMainType)
				fOutlineViewer.expandToLevel(2);
			
			Object selectedElement= getSelectedElement();