private void saveContinueLabel(Label startLabel) {
            Object top = mBreakInfoStack.get(mBreakInfoStack.size() - 1);
            if (! (top instanceof BreakAndContinueLabels))
                throw new IllegalArgumentException("Internal compiler error: Break stack - unexpected object found.");
            ((BreakAndContinueLabels) top).setContinueLabel(startLabel);
        }