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
return null;
	}
	/*
	 * @see org.eclipse.jface.text.contentassist.IContentAssistProcessor#getErrorMessage()
	 */
	public String getErrorMessage() {
		return null;
	}
	/*
	 * @see org.eclipse.jface.text.contentassist.IContentAssistProcessor#getContextInformationValidator()
	 */
	public IContextInformationValidator getContextInformationValidator() {
		return null;
	}
	/**
	 * Creates a progress monitor.
	 * <p>
	 * The default implementation creates a
	 * <code>NullProgressMonitor</code>.
	 * </p>
	 * 
	 * @return a progress monitor
	 */
	protected IProgressMonitor createProgressMonitor() {
		return new NullProgressMonitor();
	}
	/**
	 * Creates the context that is passed to the completion proposal
	 * computers.
	 *