Bug 121797 [Viewers] internalRefresh(Object)
AbstractListViewer.internalRefresh(Object) does not wrap calls to setRedraw on its org.eclipse.swt.widgets.List within a try-finally block. There are many methods between the two calls to setRedraw that subclasses could throw Exceptions on which could cause setRedraw(true) not to be called. The most likely is the call to the LabelProvider through AbstractLabelViewer.getLabelProviderText(ILabelProvider, Object)
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractListViewer.java
Object input = getInput();
        for (int i = 0; i < elements.length; ++i) {
            if (equals(elements[i], input)) {
                setInput(null);
                return;
            }
            int ix = getElementIndex(elements[i]);
            if (ix >= 0) {
                listRemove(ix);
                listMap.remove(ix);
                unmapElement(elements[i], getControl());
            }
        }
    }
    /**
     * Removes the given elements from this list viewer.
     * The selection is updated if required.
     * <p>
     * This method should be called (by the content provider) when elements 
     * have been removed from the model, in order to cause the viewer to accurately
     * reflect the model. This method only affects the viewer, not the model.
     * </p>
     *
     * @param elements the elements to remove
     */
    public void remove(final Object[] elements) {
        assertElementsNotNull(elements);
        if (elements.length == 0) {
        	return;
        }