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_LEXICAL_SORTING_CHECKED= "LexicalSortingAction.isChecked"; 
		private TreeViewer fOutlineViewer;
		private LexicalSortingAction(TreeViewer outlineViewer) {
			super(TextMessages.JavaOutlineInformationControl_LexicalSortingAction_label, IAction.AS_CHECK_BOX);
			setToolTipText(TextMessages.JavaOutlineInformationControl_LexicalSortingAction_tooltip);
			setDescription(TextMessages.JavaOutlineInformationControl_LexicalSortingAction_description);
			JavaPluginImages.setLocalImageDescriptors(this, "alphab_sort_co.gif"); 
			fOutlineViewer= outlineViewer;
			boolean checked=getDialogSettings().getBoolean(STORE_LEXICAL_SORTING_CHECKED);
			setChecked(checked);
			PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.LEXICAL_SORTING_BROWSING_ACTION);
		}
		public void run() {
			valueChanged(isChecked(), true);
		}
		private void valueChanged(final boolean on, boolean store) {
			setChecked(on);
			BusyIndicator.showWhile(fOutlineViewer.getControl().getDisplay(), new Runnable() {
				public void run() {
					fOutlineViewer.refresh(false);
				}
			});
			if (store)
				getDialogSettings().put(STORE_LEXICAL_SORTING_CHECKED, on);
		}
	}
	private class SortByDefiningTypeAction extends Action {