Bug 91899 [Markers] IMarker.setAttribute fails when attributeName = IMarker.LOCATION
Calling setAttribute(IMarker.LOCATION, "foo") on an IMarker instance does nothing---the "Location" column in the Problem View remains blank.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/FieldLineNumber.java
private String description;
    private Image image;
    /**
     * Create a new instance of the receiver.
     */
    public FieldLineNumber() {
        description = MarkerMessages.description_lineNumber;
    }
    /*
     *  (non-Javadoc)
     * @see org.eclipse.ui.views.markers.internal.IField#getDescription()
     */
    public String getDescription() {
        return description;
    }