Bug 117493 [content assist] CompletionRequestor#completionFailure(IProblem)) is ignored
This got introduced after 3.2 M1 (i.e. broken in 3.2 M2 and newer). If completion fails we now always show: "No completion available." instead of the real error text. Example: for (Iterator i=things.iterator(); i.<ctrl-space> // Iterator not yet imported)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/ContentAssistProcessor.java
private static final Comparator ORDER_COMPARATOR= new Comparator() {
		public int compare(Object o1, Object o2) {
			CompletionProposalCategory d1= (CompletionProposalCategory) o1;
			CompletionProposalCategory d2= (CompletionProposalCategory) o2;
			
			return d1.getSortOrder() - d2.getSortOrder();
		}
		
	};
	
	private final List fCategories;
	private final String fPartition;
	private final ContentAssistant fAssistant;
	
	private char[] fCompletionAutoActivationCharacters;
	
	
	private int fRepetition= -1;
	private List fCategoryIteration= null;