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/JavaCompletionProposalComputer.java
/*
		 * @see IContextInformation#getImage()
		 */
		public Image getImage() {
			return fContextInformation.getImage();
		}
		/*
		 * @see IContextInformation#getInformationDisplayString()
		 */
		public String getInformationDisplayString() {
			return fContextInformation.getInformationDisplayString();
		}
		/*
		 * @see IContextInformationExtension#getContextInformationPosition()
		 */
		public int getContextInformationPosition() {
			return fPosition;
		}
		public void setContextInformationPosition(int position) {
			fPosition= position;
		}
		/*
		 * @see org.eclipse.jface.text.contentassist.IContextInformation#equals(java.lang.Object)
		 */
		public boolean equals(Object object) {
			if (object instanceof ContextInformationWrapper)
				return fContextInformation.equals(((ContextInformationWrapper) object).fContextInformation);
			else
				return fContextInformation.equals(object);
		}